Question

Suppose you are supplied with a solution of CaCO3. How can you identify the acid radical and basic radical present in the salt? Briefly describe the procedure , reaction, observation & result.

Answer 1

Salt Analysis

Explanation:

Always check the colour of the salt first. If the salt is colourless, perform salt analysis to confirm the cation and anion.

Salt Analysis test for Calcium is as follows:

Calcium (Ca2+)

A white precipitate is formed when aqueous (NH4)2C2O4 (ammonium oxalate) and NH4OH are added to the solution.

Formation of a white precipitate indicates calcium cation.

Salt Analysis test for Carbonate is as follows:

Carbonate (CO3)2-

Add magnesium sulphate (MgSO4) to the water extract of the salt

Formation of a white precipitate indicates carbonate anion.