Question

if the solubility of salt AB2 in water is s MOL L-¹ then it's solubility product is
a. 2s²
b. 4s³
b. 4s²
c. 3s³​

Answer 1

option b is the answer

Answer 2

b. 4s³ is the correct answer.

Ksp or solubility product constant is defined as "the equilibrium between a solid and its respective ions in a solution."

The formula to calculate solubility product is - concentration of cation and anion in aqueous solution is multiplied. The concentration is in units mol/litre.

For a salt with formula AB2, it's constituent ions will be - [A(²+)] + [B(-)]².

Thus, keeping the values of solubility in above formula -

Ksp = s*(2s)²

Ksp = s*4s²

Ksp = 4s³.