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Indicate the concentration of each ion present in the solution formed by mixing the following 15.0 mL of 0.260 M Na2SO4 and 27.2 mL of 0.200 M KCl Na K SO4 2 CL?
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What does iodine and Benedict's test indicate?
Iodine tests for the presence of starch. It is brownish yellow in color if there is no starch present, and bluish black if starch is present. Benedict's solution is used to test for the presence of a reducing sugar, changing from its usual color blue to green to brick red if reducing sugars are present. No reducing sugar solution stays blue.
What is the concentration of 300.0 mL of an HCl solution that required 16.4 mL of 6.90 M NaOH to neutralize?
The answer would be theoretically , 16.4* 6.9/300=0.3772M But one thing this concentration of NaOH is pretty high, and is not practical to make this solution. Concentration 6.9M means that you'll have to dissolve 40*6.9=286gm NaOH in one 1 litre water. Thus more than 4 gm are present in that 16.4 ml, which is very difficult.
What does a subscript following a set of parenthesis in a chemical formula indicate?
The number of units of the polyatomic ions with formulas contained within the parentheses that are present in a formula unit.
How many ions present in NaCl solution?
2 Sodium and Chloride.
How can you tell by using Benedicts solution and iodine to seewhat kind of sugar it is?
The test for a reducing sugar using benedicts solution is by, first making a colour chart, using various KNOWN concentrations of glucose situations, if available. Then use the unknown substance and add benedicts solution and boil, a red precipitate should appear and the "redder" it is, the stronger the concentration. You can then filter off the precipitate and place the remaining liquid into a cuvette and pass through a colorimeter, on a red filter, the more light that passes through, the sronger the concentration. Compare this solution to your colour chart to help you determine the concentration of the reducing sugar. Thanks :) steph :)
What is the difference between amount and concentration?
quantity of substance present in solution
When zinc rod is dipped in zinc sulphate sol then concentration of solution after time will be?
The concentration of the zinc sulphate solution will not change when a zinc rod is dipped into it. This is because zinc is already present in the solution as zinc ions, so the addition of a zinc rod will not alter the concentration of zinc ions in the solution.
What color does the indicator turn when starch is present?
Iodine is used to indicate whether starch is present in a solution. If starch IS present, the indicator will turn dark blue/black. Iodine is used to indicate whether starch is present in a solution. If starch IS present, the indicator will turn dark blue/black. FOR WHAT PURPOSE WE USE STARCH-IODINE INDICATOR PAPER
What tells us how much solute is present compared to the amount of solvent?
The amount of saturation tells how much solute is present compared to the amount of solvent..!!
PH of acetic acid in 250M solution?
get the moles of hydrogen ions present in the solution by writing down the acid dissociation formula of the acid. Find the concentration of hydrogen ions present in the solution. Use -log[H+] to get the pH.
Identify and explain the relationship between the mole concept and solution concentration?
ahm... im really not so sure about this thing... but i think that, the more number of moles present in a solution the more concentrated it is....
What quantities are compared when the concentration of a solution is measured?
In science, concentration is the number of moles of solute divided by the total volume of the solution (not just the volume of the solvent). Concentration units can also include the percentage solute to the total mass of the solution; the parts per million, ppm of the solute compared to the total parts present.
Which of the following things do prblem solution and persuasive essays have in common?
they both present an argument
What does low concentration mean?
The low concentration can be 'a particular thing is present in low quantity'.... same way how low concentration of salt in water means low quantity of salt in water.....it is used in biology......for hypertonic solution, isotonic solution, hypotonic solution..........
Formula for finding distance?
if the concentration of sugar solution of volume of 360 cm3 cube is 0.785 mol/ dm3 has the mass of 25g of sugar present in the solution. work out for the mole of the sugar content in the solution.
What has more hydrogen ions acidic or basic solutions?
A hydrogen ion is just a proton, H+. The pH of a solution depends on proton concentration, pH = -log of H+ concentration. Therefore, the greater the number of protons present in solution, the lower the pH number, and the more acidic the solution.
Which of the following things do problem solution and persuasive essay have in common?
Both problem solution and persuasive essays aim to convince the reader of a particular viewpoint or solution. They both present an argument with supporting evidence and reasoning. Additionally, both essays typically follow a structured format with an introduction, body paragraphs, and a conclusion.
