Question

9.72 g of potassium chloride dissolves in 30g water at 70 degree Celsius ? Calculate the solubility of potassium chloride at this
temperature?

Answer 1

Solubility is given in g/100g of water; grams of solute dissolved in 100g of water.

9.72 g of potassium chloride dissolves in 30g water, then 100g of water would dissolve;

= 100/30 * 9.72

= 32.4g


Thus, the solubility of potassium chloride = 32.4g/100g of water

Answer 2

Answer: The solubility of potassium chloride at the given temperature is 32.4 g/100 g

Explanation:

Solubility is defined as the amount of solute that can be dissolved in 100 grams of solvent.

We are given:

Amount of potassium chloride dissolved in 30 grams of water = 9.72 g

To calculate the mass of potassium chloride that can be dissolved in 100 g of water, we use unitary method:

In 30 grams of water, amount of KCl dissolved is 9.72 grams

So, in 100 grams of water, amount of KCl dissolved will be = $\frac{9.72g}{30g}\times 100=32.4g$

Hence, the solubility of potassium chloride at the given temperature is 32.4 g/100 g