Question

Distinguish between Ferrous Chloride solution and Ferric Chloride solution using ammonium salt solution.

Answer 1

1. A pale green precipitate of ferrous hydroxide is formed when aqueous ammonia (NH4OH) is added to the solution of a ferrous salt.

Ferric salts give a reddish brown precipitate of ferric hydroxide.
2. A solution of a ferrous salt acidified with dilute sulfuric acid decolourises potassium permanganate when a few drops of the purple solution of the latter are added to it.