How much copper sulphate will be required to saturate 100g of a dilute aqueous solution of CuSO_(4) at 25^(@)C if 10g of the dilute solution leave on evaporation and drying 1.2g of anhydrous CuSO_(4) ? The solubility of CuSO_(4) in water at 25^(@)C is 25.

How much copper sulphate will be required to saturate 100g of a dilute

1.	How much copper sulphate will be required to saturate 100g of a dilute aqueous solution of CuSO_(4) at 25^(@)C if 10g of the dilute solution leave on evaporation and drying 1.2g of anhydrous CuSO_(4) ? The solubility of CuSO_(4) in water at 25^(@)C is 25.
Answer» Solution :100g of dilute solution of `CuSO_(4)` CONTAIN `=1.2 xx 10 = 12.0 g CuSO_(4)` MASS of water present in dilute solution `=(100-12)=88g` To saturate 100g of water, `CuSO_(4)` required = 25g So, to saturate 88g of water, `CuSO_(4)` required `= (25)/(100)xx88` `=22g` Thus, the mass of `CuSO_(4)` to be ADDED to 100g of dilute solution to saturate it `= (22-12)=10g`.