A china dish weighs 25 g when empty.When saturated solution of potassium chloride is poured into it at `40^(@)C` , the weight of the dish is 63 g . When the solution is evaporated to dryness, the china dish along with crystals weighs 40 g. Find the solubility of potassium chloride at `40^(@)C` .

Explanation

To find the solubility of potassium chloride (KCl) at 40°C, we can follow these steps:

### Step 1: Calculate the weight of the saturated solution of KCl
The weight of the china dish when filled with the saturated solution is given as 63 g. The weight of the empty dish is 25 g.

**Calculation:**
\[
\text{Weight of saturated solution} = \text{Weight of dish with solution} - \text{Weight of empty dish}
...