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What is titrate?
A Titration is a producers which used to determine the concentration of an acid or base.
Why it is preferred to take acid in burette during acid base titration?
The burette can be filled with either acid or base. The acid will go into the burette only if you want to titrate a base , i.e. you don't know the concentration of the base and want to find out. The solution of known concentration goes always into the burette (in order to be able to measure the volume taken to complete the reaction) and so if you wanted to find out the concentration of an acid you would put the base into the burette.
What is a titration?
A titration is the use of carefully measured amounts of a known solution to determine the concentration of another. They often involve acid-base neutralisation or oxidation-reduction reactions (examples would be sodium hydroxide with hydrochloric acid, or permanganate with an iron solution). The main part of the system is the burette, a large graded tube with a controllable variable nozzle at its end. This nozzle is used to add different amounts with great precision to the solution being tested, so that an exact reading can be made - if done correctly, the titration's accuracy is limited only by the scale on the burette. A sample of the test solution (collected using a pipette with a known volume and high degree of accuracy; the sample is called an aliquot) is placed in a container, usually a conical flask, under the burette. The burette is filled with known solution, i.e. one where the concentration is know to another high degree of accuracy. The two are mixed slowly and allowed to react - for acid-base titrations an indicator will be added to the flask, for redox the solution which will change colour is put in the burette. This is continued slowly until the solution will barely react with that from the burette. At this point the amount of solution taken from the burette is recorded. Ideally, the next slightest drop of burette solution will cause a change in colour of the solution that does not change at all. If not, the new recording is made and the last step repeated. This amount is a titre. The whole experiment is repeated several times. The data is collected and averaged out. From this, an amount of known solution used, an amount of tested solutio used and eventually a concentration can be found.
What is the precaution step of acid base titration?
1.The beaker,pipette and the flask should be washed properly with distilled water. 2.Pipetting has to be accurate in order to avoid excess addition of the titrating agent. 3.The flask containing the indicator (phenolphthalein or methyl orange) must be shaken well while acid is added to it. 4.The acid should be added dropwise. 5.Contamination should be avoided. 6.Excess of indicator should not be used. 7.The flask into which acid is added dropwise should be removed as soon as the indicator changes color. 8.Readings should be taken avoiding the parallox error.
What is back titration and how does it work?
A back titration is similar to a direct titration, but a bit more difficult. When an end point is not easily identified due to no colour change, an excess volume of a reactant of KNOWN CONCENTRATION is added to the reactant of unknown concentration. Then the resulting mixture is titrated again (or titrated back) to find the volume of the unreacted reactant, which will tell us the amount that DID react with the solution of unknown concentration. You need to take into account the amount of excess reactant originally added. The relevant calculations can then be taken out. Hence there are three reactants namely A,B,C. Such that it is to find the purity of C. This titration is possible only if A and B can react with each other and A and C can react with each other but the product of A and C do not react with B.
What is titrate?
A Titration is a producers which used to determine the concentration of an acid or base.
What precautions should be taken when using 6.0m HCl?
1.) Safety glasses to shield your eyes from any contact with acid 2.) Pouring the solution ( into maybe a conical flask, beaker etc.) at eye level to avoid spillage.
Why it is preferred to take acid in burette during acid base titration?
The burette can be filled with either acid or base. The acid will go into the burette only if you want to titrate a base , i.e. you don't know the concentration of the base and want to find out. The solution of known concentration goes always into the burette (in order to be able to measure the volume taken to complete the reaction) and so if you wanted to find out the concentration of an acid you would put the base into the burette.
How can the effect of changing the mass of a catalyst on the rate of a reaction be investigated?
You can investigate what happens if you use more catalyst for the decomposition of hydrogen peroxide solution reaction. You will set the experiment up by connecting a gas syringe to a conical flask and adding the required substances into the flask. You will then record the time taken to produce a certain amount of gas in the syringe.Safety!Make sure you wear eye protection at all times.You will need:100 cm3 conical flask attached to a 100 cm3 gas syringebungstop clockhydrogen peroxide solutionmeasuring cylinderpowdered manganese dioxide (harmful)top pan balanceeye protectionMethodWeigh out 0.5 g of manganese dioxide powder into the conical flask.Add 50 cm3 of hydrogen peroxide solution and insert the bung. Start the clock straight away and swirl the flask once to mix the powder and the liquid.Twist the plunger of the gas syringe gently to stop it sticking.Measure the time taken for 50 cm3 of gas to be produced.Look carefully at the liquid left in the flask. Has the catalyst disappeared?Repeat the experiment using a different amount of manganese dioxide. The amounts you should use are given in the table. Remember to swirl the flask by the same amount every time.Resultsmass of catalyst(in g)time taken to produce 50 cm3 of gas(in seconds)0.5 g1.0 g1.5 g2.0 gAnalysing ResultsPlot a graph of the time taken against the mass of catalyst to see any patterns or trends in your results.Answer this question…
How can i do an investigation on changing the amount of catalyst to decompose hydrogen peroxide?
You can investigate what happens if you use more catalyst for the decomposition of hydrogen peroxide solution reaction. You will set the experiment up by connecting a gas syringe to a conical flask and adding the required substances into the flask. You will then record the time taken to produce a certain amount of gas in the syringe.Safety!Make sure you wear eye protection at all times.You will need:100 cm3 conical flask attached to a 100 cm3 gas syringebungstop clockhydrogen peroxide solutionmeasuring cylinderpowdered manganese dioxide (harmful)top pan balanceeye protectionMethodWeigh out 0.5 g of manganese dioxide powder into the conical flask.Add 50 cm3 of hydrogen peroxide solution and insert the bung. Start the clock straight away and swirl the flask once to mix the powder and the liquid.Twist the plunger of the gas syringe gently to stop it sticking.Measure the time taken for 50 cm3 of gas to be produced.Look carefully at the liquid left in the flask. Has the catalyst disappeared?Repeat the experiment using a different amount of manganese dioxide. The amounts you should use are given in the table. Remember to swirl the flask by the same amount every time.Resultsmass of catalyst(in g)time taken to produce 50 cm3 of gas(in seconds)0.5 g1.0 g1.5 g2.0 gAnalysing ResultsPlot a graph of the time taken against the mass of catalyst to see any patterns or trends in your results.Answer this question…
What is a titration?
A titration is the use of carefully measured amounts of a known solution to determine the concentration of another. They often involve acid-base neutralisation or oxidation-reduction reactions (examples would be sodium hydroxide with hydrochloric acid, or permanganate with an iron solution). The main part of the system is the burette, a large graded tube with a controllable variable nozzle at its end. This nozzle is used to add different amounts with great precision to the solution being tested, so that an exact reading can be made - if done correctly, the titration's accuracy is limited only by the scale on the burette. A sample of the test solution (collected using a pipette with a known volume and high degree of accuracy; the sample is called an aliquot) is placed in a container, usually a conical flask, under the burette. The burette is filled with known solution, i.e. one where the concentration is know to another high degree of accuracy. The two are mixed slowly and allowed to react - for acid-base titrations an indicator will be added to the flask, for redox the solution which will change colour is put in the burette. This is continued slowly until the solution will barely react with that from the burette. At this point the amount of solution taken from the burette is recorded. Ideally, the next slightest drop of burette solution will cause a change in colour of the solution that does not change at all. If not, the new recording is made and the last step repeated. This amount is a titre. The whole experiment is repeated several times. The data is collected and averaged out. From this, an amount of known solution used, an amount of tested solutio used and eventually a concentration can be found.
What is the Procedures for testing Active clay in Green Sand?
yeah,sure.its so simple to find out the active clay in green sand.Active clay means ,the total active amount of clay(bentonite) present in a sample of green sand.Test Procedure:-Take some sample of green sand and keep it in a oven for 1hr at a temp of 100 deg celsious.This procedure is to make the sand free from moisture.Measure 5gms of this sand after taken from oven and put it in a conical flask with a 50ml of distilled water.Then again keep this in the oven for 10-15 min to boil the solution.Take this from the oven and keep it for a few mins to get cool.Then pour 2ml of diluted h2so4(sulphuric acid) in to the same mixture and place the flask under a burette filled with methylene blue.Then start the titration by leaving methylene blue to the flask containing the above said solution of sand.Shake the flask continously to allow the methylene blue to equally mix with the sand.Stop the titration alternately and place a single drop of solution from the flask in to a filter paper.If you find a light blue ring colour around the dark blue colour(colour of methylene blue) , its the end of itration and read the burette reading.Other wise you can continue titration until you get as above said.calculation:-for example , suppose burette reading is 74there fore active clay = 74/5 =14.8% (for 5gm sample of sand)Hope you understood the procedureThank you.
What is titration in chemistry?
Completely titrated means it reached the stoichiometric point (usually pH=7). Simply means neutralized.
How do you prepare rayon from cellulose?
Aim of the projects The main objective of the project is to illustrate the preparation of rayon by the cuprammonium process. Instead of wood pulp as the cellulose source, attempt is done to make use of raw cellulose products such as waste paper(un-printed), filter paper etc. Apparatus and chemicals Beakers(250 ml.) Conical flask(250ml.) Filter flask Funnel,glass rod Sodium hydroxide solution Copper sulphate 50% Ammonia solution Filter paper strips Syringe Procedure until a precipitate is formed. Add NaOH solution to complete precipitation. Filter off the precipitate and wash it with water two or three times until the washing does not give a precipitate with barium chloride solution. Tranfer the precipitate into a beaker and add 50 ml. of liquid ammonia.. The precipitate dissolves giving a deep blue transparent solution. This is known as Schweitzer's reagent. Cut few filter paper strips (about 1g) intosmall pieces and add them into the cuprammoniam reagent taken into a conical flask. Close the flask with a cork and keep it over night. When all the pieces of filter paper have dissolved, the solution will be viscous(called viscose). The viscous solution is drawn into a syringe. Keeping the nozzle of a syringe inside 5M sulphuric acid solution taken in a beaker, the solution in the syringe is forced into the acid solution. Move the nozzle of the syringe in the acid solution continuously to form long filaments of rayon in the acid solution. The beaker containing rayon fibers is allowed to stand undistributed until the blue colour of the rayon filaments disappears and becomes white. Remove the rayon threads from the acid bath, wash with water and dry using filter paper. Result Mass of filter paper strips used = …..g Mass of rayon thread formed = ……..g
How does concentration affect a titration?
It is easier to answer this by using examples. Let us suppose we have 4g of NaOH in 100 mls of waste water (4%). Titrating with 1M HCl would require 100ml of titrant. That would thus mean we would need 1000ml of 0.1M HCl titrant run from a buret which is extremely impractical. The concentrations thus affect volumes and thus titration flask sizes etc. It also would affect the time taken and the practicality.
What is the precaution step of acid base titration?
1.The beaker,pipette and the flask should be washed properly with distilled water. 2.Pipetting has to be accurate in order to avoid excess addition of the titrating agent. 3.The flask containing the indicator (phenolphthalein or methyl orange) must be shaken well while acid is added to it. 4.The acid should be added dropwise. 5.Contamination should be avoided. 6.Excess of indicator should not be used. 7.The flask into which acid is added dropwise should be removed as soon as the indicator changes color. 8.Readings should be taken avoiding the parallox error.
Can solution materials be taken apart?
no
