Question

1. What are sparingly soluble salts? Suggest an example.

2. Dene solubility product constant, K_sp . 

3. Obtain the relation between solubility product constant (K_sp) and solubility (S), of a solid salt of general formula M_x^p+ X_y^q-.

Answer 1

1. Sparingly soluble salts are those salts with solubility less than 0.01 M. e.g. BaSO₄ 

2. The solubility product of a sparingly soluble salt at a given temperature is defined as the product of the concentrations of its ions in the saturated solution, with each concentration term raised to the power equal to the number of times the ion occurs in the equation representing the dissociation of the electrolyte.

3. The equilibrium in the saturated solution of the salt can be represented as,