Question

How does a back titration differ from a regular titration?

Answer 1

Regular Titration:-

1. A regular titration is the basic titration method that involves the reaction between the unknown compound and the compound with known titrations.
2. The unknown compound is directly reacted with the known compound.
3. The endpoint of the titration indicates the end of the reaction.
4. By using the endpoint, the number of unknown compounds present in the sample solution can be determined.

Back Titration:-

1. A back titration is a titration method where the concentration of an unknown compound is determined by reacting with a known amount of excess reagent.
2. A back titration is also called indirect titration.
3. There is a chemical reaction between these compounds. Since the amount of the compound added is known already, we can determine the amount of the compound that is reacted with the unknown compound by doing back titration.

Difference Between Back Titration and Regular Titration:-

1. In a direct titration, we directly measure the concentration of the unknown compound without the use of excess reagent whereas, in back titration, Concentration is determined with a known amount of excess reagent.
2. The back titration is done between two known compounds whereas regular titration is done between a known compound and an unknown compound.

Therefore, regular titration generally differs from back titration by an excess reagent that is used in back titration, not in direct titration.