Question

Statement: Titer value is the volume of titrant used for a definite amount of unknown reagent at its equivalence point.
State whether the given statement is true or false.
(A) True
(B) False

Answer 1

quantitative chemical analysis to determine the concentration of an identified substance. And we prepare titers as a standard solution. Its concentration and volume is known to us.

Complete step by step answer:

First, we should clear our basic concepts about titration. So, we begin our titration by taking a beaker or flask and in this flask we put a very precise amount of substance that has to be analysed and a small amount of indicator (such as phenolphthalein) placed underneath a calibrated burette. Small volumes of the titrant are then added to this substance and indicator until the indicator changes colour in reaction. When the colour of the solution changes it represents the arrival at the endpoint of the titration, meaning the amount of titrant balances the amount of analysed substance present, according to the reaction between the two. One or two drops more of the titrant can differ the difference between a permanent and temporary change in the indicator.
We can say that the titer value is determined from base titrant standardization. The titer value is the amount of acid neutralized per mL titrant solution. This confirms the above statement that, titer value is the volume of titrant used for a definite amount of unknown reagent at its equivalence point.
The above statement is absolutely correct. And hence, we can say that this is the true statement and option A is correct.

Note: There are different types of titration. The most common types of qualitative titration are acid–base titrations and redox titrations. We should note that acid–base titrations depend on the neutralization between an acid and a base when mixed in solution. In this titration we also use suitable indicators and this acid–base indicator indicates the endpoint of the titration by changing colour.

We should know that in other types of titration that is Redox titrations, these titrations are based on a reduction-oxidation reaction between an oxidizing agent and a reducing agent. For example, if we take one constituent as oxidising that is potassium dichromate, the colour change of the solution from orange to green is not definite, therefore an indicator such as sodium diphenylamine is used.