Write the formulae of the salts given below :
Potassium sulphate , sodium sulphate , calcium sulphate , magnesium sulphate , copper sulphate , sodium chloride , sodium nitrate , sodium carbonate and ammonium chloride.
Identify the acids and bases from which the above salts may be obtained . How many families can you identify among these salts ?

Explanation

To solve the problem, we will write the formulae for each of the salts listed, identify the acids and bases from which they are derived, and determine how many families of salts can be identified among them.

### Step 1: Write the formulae of the salts

1. **Potassium Sulfate**: The formula is **K₂SO₄**.
2. **Sodium Sulfate**: The formula is **Na₂SO₄**.
3. **Calcium Sulfate**: The formula is **CaSO₄**.
4. **Magnesium Sulfate**: The formula is **MgSO₄**.
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