What is back titration example?
BACK TITRATION Back titration is a process in which the excess of a standard solution used to consume an analyte is determined by titration with a second standard solution. Example: Determination of acetylsalicylic acid in aspirin. Sometime direct titration of an analyte with a reagent is not FEASIBLE.
What is the principle of back titration?
A back titration is a titration method where the concentration of an analyte is determined by reacting it with a known amount of excess reagent. The remaining excess reagent is then titrated with another, second reagent.
How do you do a back titration step by step?
5 Simple Steps in Back Titration Calculations: Determine the amount of C required in the titration. Using stoichiometry, find the amount of A that reacted with C in the titration. Note that amount of A that reacted with C in the titration = amount of A that did not react with B in the earlier reaction.
What is the difference between a titration and a back titration?
The key difference between titration and back titration is that in a titration, we usually add a chemically equal amount of standard solution to the analyte whereas, in a back titration, we add an excess amount of standard solution to the analyte.
Why is it called back titration?
Back titration is also titration. It is called back titration because it is not carried out with the solution whose concentration is required to be known (analyte) as in the case of normal or forward titration, but with the excess volume of reactant which has been left over after completing reaction with the analyte.
What is the advantage of back titration?
Advantages of doing back titration 1- Useful if the endpoint of the reverse titration is easier to identify than the endpoint of the normal titration. 2- Useful when trying to work out the amount of an acid or base in a non-soluble solid.
Why do we use back titration?
Answer and Explanation: Back titration or indirect titration is commonly used when the reaction is very slow, the endpoint of the normal titration method is difficult to determine and it is also used for some precipitation titrations.
How is back titration different from direct titration?
The main difference between back titration and direct titration is that a back titration determines the concentration of the unknown by determining the remaining amount of the compound with a known concentration whereas a direct titration directly measures the concentration of the unknown compound.
How is back titration used in real life?
For instance, a food processing company might use titration to calculate the precise amount of salt in a particular foodstuff. It can also be used to determine the concentration of vitamin C or vitamin E additives in foods.