2 g of potassium sulphate was dissolved in 12.5 ml of water. On cooling, the first crystals appeared at 60^@ C. What is the solubility of potassium sulphate in water at 60^@ C?

2 g of potassium sulphate was dissolved in 12.5 ml of water. On coolin

1.	2 g of potassium sulphate was dissolved in 12.5 ml of water. On cooling, the first crystals appeared at 60^@ C. What is the solubility of potassium sulphate in water at 60^@ C?
Answer» Solution :12.5 ml of WATER weighs 12.5 g. In 12.5 g of water, the AMOUNT of potassium SULPHATE dissolved is 2 g. In 1 g of water, amount of potassium sulphate dissolved is 2/12.5 g. Hence in 100 g of water, the amount of potassium sulphate dissolved is`(2 xx100)// 12.5 = 16 g.` The solubility of potassium sulphate in water at 60°C is 16 g.