Question

Distinguish between the following pairs of compounds using a reagent in the chemical test:

1. Copper (II) Sulphate and Magnesium Sulphate Solution​

Answer 1

Distinguish between copper sulphate and magnesium sulphate

Explanation:

We can distinguish between copper sulphate and magnesium sulphate by a simple water test. Both salts are white in colour. Pure Copper Sulphate is anhydrous. When water is added, it turns blue. Magnesium sulphate is colourless when water is added.

1. Copper confirmation can be done by adding Na2CO3. Reddish scales are formed.
2. Magnesium confirmation can be done by adding NH4OH to the aqueous solution. You will get a white precipitate.