Dear Student,
Solubility is taken as the amount of solute that can be dissolved in 100g of solvent.
Thus 100g of water dissolves 40g KCl
therefore, 50 g of water will dissolve (40/100) × 50 = 20g of KCl Now, 20g of KCl is required to form a saturated solution in 50g of water.
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Text Solution
Solution : (a) Mass of potassium chloride in 100 g of water in saturated solution = 46 g <br> Mass of potassium chloride in 50 g of water in saturated solution = `((46 g))/((100 g)) xx (50g) = 23 g` <br> (b) When the solution is cooled, the solubility of salt in water will decrease. This means that upon cooling, it will start separating from the solution in crystalline form.