What is the chemical test to distinguish between sodium sulphate and ammonium sulphate ferric salt and ferrous salt?

To distinguish between sodium sulfate and ammonium sulfate, you can add barium chloride (BaCl₂) solution to the samples. Sodium sulfate will not produce any precipitate, while ammonium sulfate will give a white precipitate of barium sulfate (BaSO₄). For differentiating ferric salt from ferrous salt, adding potassium thiocyanate (KSCN) to a ferric salt solution will produce a blood-red complex (ferric thiocyanate), while ferrous salt will not produce this color change.