Question

What do you understand by the statement "the solubility of copper sulphate in water at ${20}^{\circ }C$ is 20.7 g" ?

• A. A maximum of 20.7 grams of copper sulphate can be dissolved in 100 ml water at a temperature ${20}^{\circ }$C.
• B. A maximum of 20.7 grams of copper sulphate can be dissolved in 100 g of water at ${20}^{\circ }$C.
• C. A maximum of 20.7 grams of copper sulphate can be dissolved in 79.3 g of water at ${20}^{\circ }$C.
• D. A maximum of 20.7 grams of copper sulphate can be dissolved in 79.3 ml of water at ${20}^{\circ }$C.

Answer 1

The correct option is B A maximum of 20.7 grams of copper sulphate can be dissolved in 100 g of water at ${20}^{\circ }$C.

Solubility is given in grams per 100 gm of water with temperature and 1 atmospheric pressure.