Question

Why ferrous ammonium sulphate solution is not heated before titration

Answer 1

While working in the laboratory we've seen that although oxalic acid is heated before titration ferrous ammonium sulphate is not.

Titration is the process of checking the concentration of a compound.

For oxalic acid the formula is C2H2O4.

If oxalic is kept at room temperature it decomposes.

Hence it evolves CO2 which shifts the measurement in the backward direction.

And therefore the reaction data gets analomaus.

To avoid this oxalic acid is heated before titration to remove any excess CO2.

But in case of ferrous ammonium sulphate, no such decomposition takes place.

Also at it's heated it might decompose into Ferrous oxide.

Hence, to avoid this ferrous ammonium sulphate is not heated before titration.