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What are complexometric titration method?
Direct titration, Indirect titration, back titration, replacement titration and so on
What difference between titration and back titration?
In fact, a back titration is carried out as in a very similar method to an ordinary titration. the only difference is in the context. Consider an unknown acid solution. Then a known amount of excess alkali was added to the solution and made them react. Then the process of finding the amount left from the alkali is known as the back titration.
When to use back-titration instead of direct titration?
When you have passed the tipping point and the color indicator turns from it's color to the clear color of the original solution. Then you back titrate to color again.
Why is back titration required in the volhard method?
This method uses a back titration with potassium thiocyanate to determine the concentration of chloride ions in a solution.Before the titration an excess volume of a standardized silver nitrate solution is added to the solution containing chloride ions, forming a precipitate of silver chloride (AgCl). The term 'excess' is used as the moles of silver nitrate added are known to exceed the moles of sodium chloride present in the sample so that all the chloride ions present will react.Ag+ + Cl- AgCl(s) (Ksp = 1.70 × 10−10)Excess WhiteExcess of Ag+ is back titrated with SCN-.
How does back titration differ from a direct titration?
direct titration involves the direct and stepwise addition of a standard titrant to the analyte whilst the back titration involves reacting a standard excess titrant wth an analyte solution of an unknown concentration, then reacting the excess (left over) titrant with an analyte of known concentration to determine the concentration of excess titrant.
What are complexometric titration method?
Direct titration, Indirect titration, back titration, replacement titration and so on
What is the chemical process for back titration?
The chemical process for back titration is to titrate the analyte past the original end point/equivalence point, and then BACK titrate the excess titrant to equivalence.
What difference between titration and back titration?
In fact, a back titration is carried out as in a very similar method to an ordinary titration. the only difference is in the context. Consider an unknown acid solution. Then a known amount of excess alkali was added to the solution and made them react. Then the process of finding the amount left from the alkali is known as the back titration.
When to use back-titration instead of direct titration?
When you have passed the tipping point and the color indicator turns from it's color to the clear color of the original solution. Then you back titrate to color again.
Why is back titration required in the volhard method?
This method uses a back titration with potassium thiocyanate to determine the concentration of chloride ions in a solution.Before the titration an excess volume of a standardized silver nitrate solution is added to the solution containing chloride ions, forming a precipitate of silver chloride (AgCl). The term 'excess' is used as the moles of silver nitrate added are known to exceed the moles of sodium chloride present in the sample so that all the chloride ions present will react.Ag+ + Cl- AgCl(s) (Ksp = 1.70 × 10−10)Excess WhiteExcess of Ag+ is back titrated with SCN-.
Why is titration method applicable in aspirin analysis?
When I am using back titration and direct titration as my two methods for determining the purity of aspirin tablets. doesn't the direct titration not take into consideration of the excess sodium hydroxide added to the aspirin?In both these titrations when I reach the end-point it turns pink but I kept these solution the next day and they turned back to colourless. Is this meant to happen and what chemical reaction has happened here?I titrated this again with more sodium hydroxide till the end-point then added this to the overall amount of NaOH i added in the flask.Is the only difference between back titration and direct titration not addding the HCl at the end to determine the excess amount of NaOH?Are there any methods for direct titration.Would really appreciate any help.The best you can obtain is an end point lasting 20-30 seconds. Any excess base will slowly hydrolyze the ester and liberate acetate ion from the act's because aspirin is such a weak acid that it reacts slowly with the NaOH, making it difficult to accurately get a good endpoint in a reasonable time.With back titration, you react with an excess of NaOH (known amount), heat it to make the reaction go to completion quickly, then use HCl to determine the amount of NaOH that is remaining. This reaction will go quickly, and is much easier to measure.elylsalicylic acid,aspirin.
How does back titration differ from a direct titration?
direct titration involves the direct and stepwise addition of a standard titrant to the analyte whilst the back titration involves reacting a standard excess titrant wth an analyte solution of an unknown concentration, then reacting the excess (left over) titrant with an analyte of known concentration to determine the concentration of excess titrant.
What is Back titration?
A back titration is a form of titraiton in which an excess of standard reagent is added and then the reverse of the titration is carried out.
What is a back titration?
A back titration is a form of titraiton in which an excess of standard reagent is added and then the reverse of the titration is carried out.
When should back titration used instead of back titration?
when we do not know nothing about the other titrant.
How could you determine whether phenolphthalein remains in the residue of a titration reaction?
The easiest way is to add back some of the solution you were titrating. If phenolphthalein remains, it will react with the solution and change back to purple. Incidentally, phenolphthalein will always remain in the solution of the titration reaction - it changes color depending upon the pH of the solution, but the indicator itself is not affected by the titration reaction.
What and a weakness of the point by point method of comparing and contrasting?
the comprising can go back-and-forth
