What is the solution casting method?
It is the simplest method used to create thin films from solution using centrifugal force. By drop small amount of polymer solution (or chemical solution) onto spinning head (mold or surface), then spin the solution (rpm for few seconds or minutes), the centrifugal force (force used for rotating around the motor) will provide enough force to spread the solution droplet into thin film layers spreading out on top of the surface (mold).
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dilute 85ml of HCL to 1000ml. This answer does not state which is the original concentration of the 85ml of HCL mentioned.. The question should state what does the operator have initially (for example "I have HCl 87.5% (v/v; 7+1) solution and I want to get 1N solution of HCl, what should I do?"
Answer . This space is for answering " http://wiki.answers.com/Q/How do you determine integral heat of solution of ammonium chloride by the calorimeteric method "
Cast: Used to immobilise broken bones OR The first step in making a mold for dentures etc or The group of people called actors in plays, TV shows movies and so on defenition:a slight hint or trace of some color
Hinduism developed out beliefs of Aryans in Ancient India and many other countries. Part of that belief system says that all things have a place in nature's order. An age-old Indian social structure has its roots in that idea. According to the Aryans, it was the law of nature that people belonged to… particular classes, or in other words: caste. ( Full Answer )
Advantages of the casting process . A casting may be defined as a " metal object obtained by allowing molten metal to solidify in a mold ", the shape of the object being determined by the shape of the mold cavity.. Certain advantages are inherent in the metal casting process. These often fo…rm the basis for choosing casting over other shaping processes such as machining, forging, welding, stamping, rolling, extruding, etc. Some of the reasons for the success of the casting process are:. The most intricate of shapes, both external and internal, may be cast. As a result, many other operations, such as machining, forging, and welding, can be minimized or eliminated. Because of their physical properties, some metals can only be cast to shape since they cannot be hot-worked into bars, rods, plates, or other shapes from ingot form as a preliminary to other processing. Construction may be simplified. Objects may be cast in a single piece which would otherwise require assembly of several pieces if made by other methods. Metal casting is a process highly adaptable to the requirements of mass production. Large numbers of a given casting may be produced very rapidly. For example, in the automotive industry hundreds of thousands of cast engine blocks and transmission cases are produced each year. Extremely large, heavy metal objects may be cast when they would be difficult or economically impossible to produce otherwise. Large pump housing, valves, and hydroelectric plant parts weighing up to 200 tons illustrate this advantage of the casting process. Some engineering properties are obtained more favorably in cast metals. Examples are :: More uniform properties from a directional standpoint; i.e., cast metals exhibit the same properties regardless of which direction is selected for the test piece relative to the original casting. This is not generally true for wrought metals.. Strength and lightness in certain light metal alloys, which can be produced only as castings. Good bearing qualities are obtained in casting metals. . A decided economic advantage may exist as a result of any one or a combination of points mentioned above. The price and sale factor is a dominant one which continually weighs the advantages and limitations of process used in a competitive of enterprise. . There are many more advantages to the metal-casting process; of course it is also true that conditions may exist where the casting process must give way to other methods of manufacture, when other processes may be more efficient. For example, machining procedures smooth surfaces and dimensional accuracy not obtainable in any other way; forging aids in developing the ultimate of fiber strength and toughness in steel; welding provides a convenient method of joining or fabricating wrought or cast products into more complex structures; and stamping produces lightweight sheet metal parts. Thus the engineer may select from a number of metal processing methods that one or combination, which is most suited to the needs of his work. ( Full Answer )
Bromothymol Blue (BTB) Bromothymol blue is an indicator, a substance that changes color as the pH of a solution changes. Bromothymol blue is yellow in acidic solutions and blue in basic solutions. . BTB can be prepared by mixing 0.1 g (a pinch) of bromothymol blue powder in 10 mL of a 4% solutio…n of sodium hydroxide. . Add 20 mL of alcohol and dilute to 1 L with distilled water. . The solution should be deep blue. . If it is green, add sodium hydroxide solution drop by drop until the solution turns blue. . Bromothymol blue can be purchased from scientific supply houses. CAUTION: Sodium hydroxide is corrosive; the BTB solution should be prepared in a laboratory. BTB stains hands and clothes. Have students wear goggles and follow safety precautions when using BTB solution. ( Full Answer )
This is good for separating a liquid from a solution. For example, water can be separated from salty water by simple distillation. This method works because the water evaporates from the solution, but is then cooled and condensed into a separate container. The salt does not evaporate and so it sta…ys behind. ( Full Answer )
A 'method' usually refers to a step by step process used to achieve a desired goal. A method can be either a physical or a mental process: physical as in making toast or starting a car, and mental as in making decisions, finding the answers to questions, and solving problems. An effective method is …made up of "critical parts," which means that it has separate steps that must all be addressed and addressed effectively for the method to be successful. This aspect of method can be restated in a way that clearly shows its great practical importance; "An effective process, effectively carried out, will always produce a good product." And this is not merely a factual truth but a more powerful, logical truth. One of its uses is that the goodness of the product is testable by the method itself rather than by its visible results. We can all see the truth of this by using any handy and reliable calculator. 1.Choose a calculator that you know is dependable. (Almost all hand-held or software calculators are extremely dependable and an easily be tested beforehand.) 2, Without looking at the screen, carefully add any two numbers together. 3. Before looking at the computed answer, ask your . A means or manner of procedure, especially a regular and systematic way of accomplishing something: a simple method for making a pie crust; mediation as a method of solving disputes. See Usage Note at http://www.answers.com/topic/methodology. . Orderly arrangement of parts or steps to accomplish an end: random efforts that lack method. . The procedures and techniques characteristic of a particular discipline or field of knowledge: This field course gives an overview of archaeological method. . Method A technique of acting in which the actor recalls emotions and reactions from past experience and uses them in identifying with and individualizing the character being portrayed. self if you know it the unseen result is correct or not. A moment's reflection will reveal to you what I mean here by the proof of goodness being in the method itself -- you will know you have the right answer without even knowing what the answer is. (!) . A means or manner of procedure, especially a regular and systematic way of accomplishing something: a simple method for making a pie crust; mediation as a method of solving disputes. See Usage Note at http://www.answers.com/topic/methodology. . Orderly arrangement of parts or steps to accomplish an end: random efforts that lack method. . The procedures and techniques characteristic of a particular discipline or field of knowledge: This field course gives an overview of archaeological method. . Method A technique of acting in which the actor recalls emotions and reactions from past experience and uses them in identifying with and individualizing the character being portrayed. . A means or manner of procedure, especially a regular and systematic way of accomplishing something: a simple method for making a pie crust; mediation as a method of solving disputes. See Usage Note at http://www.answers.com/topic/methodology. . Orderly arrangement of parts or steps to accomplish an end: random efforts that lack method. . The procedures and techniques characteristic of a particular discipline or field of knowledge: This field course gives an overview of archaeological method. . Method A technique of acting in which the actor recalls emotions and reactions from past experience and uses them in identifying with and individualizing the character being portrayed. . A means or manner of procedure, especially a regular and systematic way of accomplishing something: a simple method for making a pie crust; mediation as a method of solving disputes. See Usage Note at http://www.answers.com/topic/methodology. . Orderly arrangement of parts or steps to accomplish an end: random efforts that lack method. . The procedures and techniques characteristic of a particular discipline or field of knowledge: This field course gives an overview of archaeological method. . Method A technique of acting in which the actor recalls emotions and reactions from past experience and uses them in identifying with and individualizing the character being portrayed.shit ( Full Answer )
Sorry, but there is only one solution. However, there are two ways to make these solutions. First you find the pH of either using litmus paper taht either turns red or blue indicating an acid or a base. Secondly, you can make your own natural pH indicator using red cabbage or blueberry.. Bowler225 … 16:41, 18 Mar 2009 (UTC). There are many indicators. They change color at set pHs, which is known as the "transition range.". Common indicators are Bromothymol Blue, Bromocresol Blue, Phenolphthalein and Methyl Orange. ( Full Answer )
In a nutshell, the process of producing thin films or membranes involves the following steps: a polymer solution or melt is forced through a die/coating machine onto a backing or inert support, such as a sheet of nylon or even cellulosic paper. The newly deposited film on its backing is then fed,… in the form of a continuously driven sheet, through a treatment process specific to the application. Finally, the sheet is packaged for later use, often by rolling it back up. Here is a longer step by step description of the process: 1) polymer system is prepared. This involves the melting or dissolution of one or more polymers into a solvent system. This step may involve more complicated procedures than simply adding solids to a solvent or heating a solid until it melts. The specifics are ultimately determined by the application, the capacity and equipment available, and the 2) the polymer melt or solution is then fed through a die coating machine onto a backing of some kind. This is by far the most common process, and even when applications do not use a backing/support the film is still cast this way (later processing will peel it away). other processes exist, such a spin coating, spray coating, etc. but this method is the most widely used in industry for the preparation of thin films or membranes. This step is typically considered to be the most precise part of the entire process. The polymer must be fed at a constant, consistent, and reliable/accurate pressure, temperature, and flow rate. This must be achieved while depositing approximately 100-200 micrograms of polymer solution (ultimately about 20-40 micrograms of solids after the solvent has been removed) per square milimeter over a width of several feet and a length of many thousands of feet. A small scale operation should produce around 7,000 feet of membrane per day per casting machine, though it can be much much higher. 3) The newly coated polymer sheet is now treated by drawing the sheet through some collection of processes along a series of cylindrical rollers. Drying, heating or cooling, photo irradiation, doping (example: exposure to a dye, a particular chemical, a salt solution, etc.), pH balancing, and rinsing are common examples of treatment stages. 4) the sheet, now treated, is typically rolled back up for later processing. It should be noted that not all films require the use of backing or support in their application there are many applications which require that the polymer film be carefully peeled away from the backing at some later processing stage. As a side note, I will mention the following about this particular method of thin film casting: Its main historical application, and that which produced the most R&D and understanding of the theory underpinning this field of materials science, was the production of large quantities of Cellulosic (nitrate or acetate) film backing for use in chemical film. Unsurprisingly, Eastman Kodak held many of the patents and trade secrets related to this technology for many years, and they (Eastman Chemical Company) still operate as one of the main suppliers of cellulose acetate used for the production of membranes or films. ( Full Answer )
I hunted around and found you a set of complete instructions with pictures. See the link.
The method of recovering solids from a solution is calledprecipitation. The solid substance that is separated is called theprecipitate.
Current Edited Answer:. Using the methods available to separate mixtures that are applicable to what solutions you want to separate.. Example: Filtration, Evaporation, Distillation.. Same as a mixture because a solution is a type of mixture.
Casting is a process of pouring molten metal into a mold to form apart. After removing from the mold, the part may be machined andheat treated for use. The part is referred to as a casting. Themetal is usually more porous than other types of metals. A Forging is a part made by hammering steel into a… final shape.Some forgings are shaped to a special hammer form. The forging isstronger than a casting. ( Full Answer )
1. Weigh the adequate quantity of the necessary substance (observe the indications: calcination, drying, etc.) . 2. Put this substance in a 1 L volumetric flask. 3. Add slowly approx. 200 mL distilled water and stir. 4. Put the flask in a thermostat at 20 0 C and maintain for 1 hour. 5. Add… distilled water up to the mark. Stir vigorously. 6. If necessary standardize the solution by titration following the suitable recommendations. 7. Transfer the solution in a bottle and apply a label (date, name of the operator, name of the solution, normality). ( Full Answer )
I have some personal problem i am very tense i want solution from you please tell me the method how i can talk to you?
The people on this site are not mental health professionals, and no reputable professional would attempt to advise on specific issues with someone they had not met. Please contact your local Mental Health Association, or see a mental health professional.
Testing the Acidity of Pools Because most pools are kept in a pH range of 7.2-7.6, the pH test that uses phenol red as a reagent is particularly effective. Add the specified number of drops of liquid, to the water sample, and compare the resulting colour to the test-kit standard.
You get a felt thing on the place of the cast, then the plaster and it hardens over it i think.
Solve the system by the elimination method 5x 5y-13 7x-3y17what is the solution to the system?
What is meant by the phrase 'there are as many methods as there are people seeking solutions' to a certain problem?
It means that there are always lots of ways to approach a problem. Some solutions might be better than others, but there are many to choose from.
No. Fajans method relies on the naked eye, which is not as precise as analytical instruments.
How do the methods of speeding the rate of solution for dissolving a solid in a liquid compare to the methods of speeding the rate of solution when dissolving a gas in a liquid?
Heat (in most cases) has an opposite effect on the solubility of solids as compared to gases. Almost all solids will dissolve faster in a liquid at higher temperatures, whereas gases will dissolve in a liquid faster at lower temperatures (as long as the temperature is not so low that the liquid in q…uestion freezes). ( Full Answer )
if u have sodium chloride solution just heat it..water will get evaporated leaving only sodium chloride
Filtration. First the solute is removed from the solution via the process of crystallization, then the slurry is poured through a filter paper where the crystalized solute is retained, and the solution is recovered in the beaker.
The first thing is by "scratching" or rubbing the flask with a glass rod or metal spatula. A second tactic is the use of seed crystals. Taking just a few crystals from the previous crop and putting them in your solution will promote the growth of more crystals. Often, it is enough to just stir the s…olution with a spatula that has touched some of the desired crystals. ( Full Answer )
That's not an equation. Maybe the expression can be factored to make it look better, but that process won't change anything, and won't answer any question, because the expression isn't an equation and doesn't ask any question.
Well I know what it means in Science. Solute is like when it is dissolved in a solution that changes its state.
Pouring off can only separate solids or liquids with a different density than the solution.
Make a bubble of liquid on top of a surface then either . Spin the chip on a spinner, or . Wait 30 seconds and rinse with clean solvent, or . Wait until on all solvent evaporates (this will leave drying spots, non-uniform coverage) In chemistry, the dropcast method is commonly understood… to be the latter (no. 3), pipetting a compound dissolved in solvent onto a surface and left to dry. As stated previously, non-uniform coverage and small volumes make repeatability an issue. ( Full Answer )
We have three methods. 1) Cramer's rule method (Or) Determinant method 2) Rank method 3) Matrix Inversion method. see the text book of 12th standard mathematics in tamilnadu text book corporation. My own question: For just 2 unknowns, do any of the above include the "ordinary" way in whic…h you multiply one or the equations through so one of the unknowns match in both lines, subtract, solve the now-single difference for its unknown then substitute back? Or do the above only apply if you're solving great banks of equations simultaneously. It's the only method I know but I recall being taught how to stretch it to 3 unknowns, but it becomes rather long-winded. I ask out of curiosity because I "learnt" matrices without understanding them and with only the haziest hint that they have any uses! ( Full Answer )
Solution Definitions The most useful type of mixture for a beginning chemistry student is one in which a relatively small amount of one substance is blended with (dissolved in) a relatively larger amount of liquid, often water, to form a homogeneous mixture. These mixtures are the typical solutions… that are used in freshman chemistry lab experiments. The solvent is the major component of a solution (the part that does the dissolving). The solute is the minor component of the solution (the part that gets dissolved). Concentration Calculations We often need a mixture with a specific composition, not only a particular solute and solvent but with specific relative amounts of each. There are several methods of stating the relative amounts of the components of a mixture. Each has its own advantages and disadvantages. Percent Composition: One of the easiest methods of making a mixture with a specific composition is to measure the masses of each of the parts and express the concentration as a percentage of solute to the mass of the entire mixture. This method is especially useful for mixtures of solids, like solder and alloys. For example, nichrome wire is a mixture of 75% nickel, 12% iron, 11% chromium, and 2% manganese by mass (data from Dr. Seeley's web site), so 100 grams of the wire has 75 grams of nickel. Mass/mass percentages are the best ways of expressing concentrations for applications in which the physical rather than the chemical properties of the mixture are most important. This is a poor way of expressing concentration for solutions used in chemical reactions, though, because mole ratio information is buried. We can convert the information to moles using the formula weight, if necessary. Some solutions are so dilute, that it is more convenient to use parts per million, ppm, or even parts per billion, ppb, instead of percent (parts per one hundred, note). To find a concentration in parts per million, divide the mass of solute by the mass of solution and multiply by one million, 10 6 . To find a concentration in parts per billion, divide the mass of the solute by the mass of the solution and multiply by one billion, 10 9 .. 4 Concept Check: According to the organization SeaFriends, seawater has 904 ppm of sulfur. What is the mass percent of sulfur in seawater? Answer: Assume one million grams of seawater. The number of grams of solute in one million grams is 904. This gives . The mole fraction, X, is the concentration expression most like percent composition yet includes mole ratio information. The mole fraction is the number of moles of one component of a mixture divided by the total number of moles in the mixture. This concentration expression is useful for situation in which the chemical behavior of the mixture is important and when the solute and solvent roles aren't clear. Raoult's Law is an example of an application that requires mole fraction concentrations: the vapor pressure of a liquid in a mixture depends on the mole fraction of that liquid. Henry's law, the solubility of a gas in a liquid, is sometimes stated in terms of mole fraction.. Concept Check: According to the alloys table from Dr. Seely's website, Dentist's amalgam is 70% mercury and 30% copper, by mass. What is the mole fraction of copper in dentist's amalgam? Answer: For the purpose of assigning significant figures, we will assume that the percentages are accurate to at least 1%. Assume 100 grams of amalgam, which contains 70 grams of mercury and 30 grams of copper, each value having at least two significant figures. Convert each to moles and find X. Note that X does not have units. . Molarity: The molarity, M, is defined as the number of moles of solute in each liter of solution. This is the most common concentration expression in the freshman chemistry lab. We use molarity when the focus is on the chemical behavior of the solute. We can measure the volume of the mixture and deduce the amount of solute present in a format that makes chemical computations as straightforward as possible. Mass/volume composition concentration would require an additional calculation to convert grams of solute into moles for any chemical calculations. In addition to laboratory labels, molarity is used extensively in physical chemistry calculations such as pH of acid solutions and equilibrium constant expressions.. Concept Check: A solution contains 5.7 grams of potassium nitrate dissolved in enough water to make 233 mL of solution. What is its molarity? Answer: The formula weight of KNO 3 is 101.103 g/mol. . Molality: The molality, m, is defined as the number of moles of solute per kilogram of solvent . This is useful when the properties of the solvent are being studied rather than the properties of the solute. When we study colligative properties, we are observing the amount of solute and the nature of the solvent. Freezing point depression is an example of a colligative property. The freezing point of a liquid is lowered by the presence of impurities. The disadvantage to molality is that we need density information to determine the amount of the mixture. Students beware: the two words (molarity and molality) are very similar, and the two variables (M and m) are really close! These two concentration expressions are easily confused. . Concept Check: What is the molality of dentist's amalgam? Recall that dentist's amalgam is 70% mercury and 30 % copper, by mass. Answer: Assume 100grams of amalgam and two significant figures, as in the previous example. By mass, mercury is the major component, so it must be the solvent. 100 grams of amalgam contains 70 grams of mercury, which is 0.070 kg of mercury. It also contains 30 grams of copper, which is 0.47 moles of copper. This gives Note that we have used the mass of the solvent rather than the mass of the mixture.. Normality: Normality, N, is similar to molarity, moles of solute per liter of solution. However, instead of the entire solute, the normality is based on the number of moles of the active part of the solute, called a chemical equivalent . For an acid, the chemical equivalent is the number of moles of H +1 ion. For a base, the chemical equivalent is the number of moles of OH -1 ions. For an oxidation-reduction solution, the chemical equivalent is the number of moles of electrons transferred. The normality of hydrochloric acid, HCl, is the same as the molarity of hydrochloric acid, because there is one mole of H +1 ions for every one mole of hydrochloric acid. The normality of sulfuric acid, H 2 SO 4 , is twice the molarity because there are two moles of H +1 ions per mole of sulfuric acid. The advantage to using normality is that it gives an effective concentration (3M sulfuric acid is twice as acidic as 3M hydrochloric acid-this is clear if they are labeled 6N and 3N, respectively). The disadvantage to using normality is that it is redundant information, since we can use the molecular formula to find the relative amount of the effective part of the solute. A bigger drawback to normality is that it is situational, so it can cause confusion. This is especially true with oxidation-reduction solutions. Some compounds can gain or lose different numbers of electrons depending on the electrochemical aggressiveness of the other reactant. For example, copper (II) ion can gain two electrons to become copper metal or it can gain one electron to become copper (I) ion. A solution that has one mole of copper (II) ion for every liter of solution is 1.0 M, but the same solution could be 1.0 N or 2.0 N depending on the reactant to which it is added. Formality: Formality, F, is the number of formula weight units of solute per liter of solution. Remember that one mole of a compound has a mass equal to the formula weight in grams. The number of formula weight units is equal to the number of moles for molecular substances. The purpose of formality is to distinguish the number of moles of a compound from the number of moles of ions in solutions of ionic compounds or weak electrolytes. If we dissolve one mole of calcium nitrate in enough water to make a liter of solution, the formality is one. The molarity (as it is commonly used) of calcium nitrate is the same as the formality, but that is a little sloppy because, once dissolved, the calcium nitrate ionizes completely so there isn't really any Ca(NO 3 ) 2 in the solution. The molarity of the nitrate ions is two molar, because one formula unit has two nitrate ions. The formality of nitrate ion doesn't exist because it is defined as the number of moles of the entire compound. So the only difference between formality and molarity is that you can express the molarity of the different ions individually and the formality is the entire compound irrespective of ionization. Formality is somewhat old fashioned. Modern more casual usage is to use molarity for both ideas and label with the appropriate solute. For example 1.0 F solution of Ca(NO 3 ) 2 is 2.0 M NO 3 1- or 1.0 M Ca(NO 3 ) 2 . Summary of the Concentration Types Concentration Type Mathematical Formula Use . % composition ppm ppb. For ease of making a solution. When physical properties are more important than chemical properties. Mixtures of solids. When the concentrations are very low, use ppm or ppb. . Mole fraction. Mixtures of solids or gases Mixtures in which the roles of solute and solvent are not clear . Molarity. Most common laboratory solutions . Molality. Situations in which the properties of the solvent are studied. . Normality. Acids and bases Oxidizing agents Reducing agents. Formality. Ionic compounds . Conversions among Units If we examine the definitions of the various concentration expressions, we can see that molality is the really different one. The denominator of the expression is the mass of only one component of the mixture. All the rest have a denominator that is a measure of the mixture as a whole. The general strategy for any other system to molality is to determine the mass of the solute as separate from the mass or volume of the mixture. Molarity, normality, and formality all have liters of solution in the denominator. We need to remember the definitions to use in the numerator, but these fairly straightforward to convert, second only to mass %, ppm, and ppb. Those conversions require only a shift in the decimal place. Percent Composition to Molarity: In order to convert mass percent to molarity or vice versa, you need to know the density of the solution. Assume 100 grams of solution; this gives you a mass of solution and a mass of solute. Use the density to find the volume of the solution. Use dimensional analysis to convert the mass of the solute to moles. Parts per million and billion can be worked the same way except for the decimal point. . Concept Check: Concentrated hydrochloric acid is 31% hydrochloric acid and 69% water, by mass. If the density of concentrated hydrochloric acid is 1.16g/mL, what is its molarity? Answer: Assume 100 grams of concentrated hydrochloric acid; this has 31 grams of HCl and 69 grams of water. The formula weight of hydrochloric acid is 36.46 g/mol, so 31 grams is 0.85moles. Find the volume of the solution. Find the molarity. . Mole Fraction to Molarity: You need density information to find mole fraction if given molarity, or vice versa. . Concept Check: An aqueous solution of sulfuric acid has a molarity of 18 mol/L. if its density of 1.84 g/mL, what is the mole fraction of water in the solution? Answer: Assume one liter of solution, which has 18 moles of sulfuric acid. The formula weight of sulfuric acid is 98.08 g/mol, so 18 moles has a mass of 1800 grams (1756 with two significant figures). Use the density formula to find the mass of the solution If 1800 grams of the solution is sulfuric acid, 40 grams must be water. The formula weight of water is 18.015 g/mol, so 40 grams of water is 2 moles. The mole fraction of water is . Molarity and Molality: You need density information to find molarity if given molality, or vice versa.. Concept Check: An aqueous solution of hydrogen peroxide, H 2 O 2 , is 16.9 mol/L. if it has a density of 1.196 g/mL, what is its molality? Answer: Assume one liter of solution; this has 16.9 moles of hydrogen peroxide. The formula weight of hydrogen peroxide is 34.015 g/mol, so the liter of solution contains 575 grams of hydrogen peroxide. Use the density formula to find the mass of one liter of solution: If the mixture has 575 grams of hydrogen peroxide in 1196 grams of solution, it must have 621 grams of water (or 0.621 kg of solvent). The molality is . Normality and Formality: The most sensible way of doing this is to use molarity all the time then use definitions to convert to formality or normality, if your instructor uses them (which probably won't happen until you reach sophomore analytical chemistry).. Concept Check: What is the normality and formality of concentrated sulfuric acid, 18 M? Answer: Sulfuric acid is an acid. There are two hydrogen ions in its formula, so one mole of solute has two moles of equivalents. Concentrated sulfuric acid has a normality of 36N. The number of gram formula weights for sulfuric acid is the same as the number of moles of solute, so concentrated sulfuric acid has a formality of 18F.. Dilutions A solution is diluted when extra solvent is added. We can calculate the concentration that results when a solution is diluted using the equation C 1 V 1 =C 2 V 2 , where C is the concentration, usually in molarity, and V is the volume. Any volume units will work in this formula as long as they are consistent. When solutions have a fairly low concentration and/or the solute is solid, the volume of the solution is roughly equal to the volume of the solvent. This is not true for solutions with a high concentration. . Concept Check: 25mL of 6M sodium hydroxide are diluted to 1.3 L. What is the resulting concentration? Answer: . Concept Check: A student wishes to make 0.5 L of a 3.0 M sulfuric acid solution using concentrated sulfuric acid, 18 M. How should she do this? Answer: Very Carefully! Diluting concentrated acids is dangerous. The process releases so much thermal energy that the water used in the dilution will boil, which may cause boiling hot acid burns. Ouch! The amount of acid to use can be calculated by the equation above. The student needs to carefully add 80 mL of concentrated acid to roughly 400 mL of water then add enough water to make a total of 500 mL of solution. Always add the acid to the water. It takes more energy to boil a lot of water than to boil a little acid. Besides, if something has to splash out, you want it to be the water not the acid. ( Full Answer )
What is the difference between the graphical and numerical methods of finding the solution of an equation?
The graphical method is often approximate but can be applied to any function. If done on a computer, the region surrounding the solution can be enlarged to obtain more accurate estimates. A numerical method will give an exact result is an analytical solution is possible. If not, the solution will d…epend on the numerical method used and, sometimes, the starting "guesstimate". ( Full Answer )
The view of religion as an outdated method for providing solutionsto life's problems was espoused by Karl Marx and others.
What conflict management method is described as a agreement between parties about what each should give or get in a solution?
Compromise is a conflict management method that is an agreementbetween parties about what each should give or get in a solution.It can also be referred to as a negotiation.
Evaporation of the solvent, or thing doing the dissolving, is most often the best method. That or super-heating the solution until it becomes over saturated, and the solid begins to settle at the bottom.
Increase the surface area of the solvent by crushing or grinding it, increase the temperature of the solvent, and/or stir the mixture.
Resin casting is done by use of a mold and a mixture made with a form of liquid synthetic resin. It is then poured or injected into the mold and left to sit until hardened.
The boxing method in constructing a cast involves pouring a gypsum into a mold, which creates an impression. The boxing method is used by dentists throughout the world.
If the process of substituting leads to an identity rather than anequation then the system has infinitely many solutions.
What method is used to separate parts of a solution when the entire solution can pass through a filter?
There are a number of different ways to separate the parts of a mixture of liquids. Since the liquids in question usually have different boiling points, they can be separated by means of distillation. If they have significantly different densities, it may be possible to separate them be means of a c…entrifuge. The liquid can be poured onto paper and separated by means of chromatography, based on the different rates at which different substances diffuse through paper. In some cases freezing, rather than boiling, can be used as a means of distillation. ( Full Answer )
The siomplest method - is filtration. Passing the solution througha series of filter papers will retain the solids, while allowingthe liquid to drain into a separate container.
Since lead iodide is insoluble in an aqueous solution, you could filter it out using a funnel and filter paper.
Which ordered pair is the solution to the system of equations below using the substitute method y 6x-4 y 7x-7?
If you mean: y = 6x-4 and y = 7x-7 then by substitution x = 3 and y = 14
No. I have no idea what "Vashikaran" means, but astrology will certainly not solve anything.
Cast can mean a few different things. Cast can be throwing afishing line out into the water, cast can also mean the charactersof a movie.
Make sure the substance is in enough water to dissolve everythingas if all of it was sodium chloride.. The sodium chloride would go into solution, the calcium carbonatewould not dissolve. Remove the liquid by passing it through a filter leaving thecalcium carbonate behind. Evaporate, distill or boil… away the liquid leaving the sodiumchloride behind. ( Full Answer )
It is 34 because 34 is the largest number that will divide evenly into 1020 and 11594 leaving no remainders
Each of the hereditary classes in Hindu society distinguished by degrees of ritual purity and of social status
Without any equality signs the given terms are not simultaneous equations and so therefore no solutions are possible.
What is the solution of this question By wronskian determinant method please find whether the solution exist or not where.... y and 8321cos and sup2x y and 83221 plus cos2x?
What is the solution of this question By wronskian determinantmethod please find whether the solution exist or not where.... y1 =(squre of) cos x, y2 = 1 + cos 2 x.