The solubility product for an insoluble salt with the formula MX₂ is written as ________, where s is the molar solubility.

Question

Quizplus · Accepted Answer

The formula MX_2 dissociates into 1 M^+ ion and 2 X^- ions. The solubility product (K_sp) is based on the concentrations of these ions in solution. For MX_2, K_sp = [M^+][X^-]^2. Since the concentration of M^+ is s and that of X^- is 2s (because there are twice as many X^- ions produced for each formula unit that dissolves), K_sp = s(2s)^2 = 4s^3.

The Solubility Product for an Insoluble Salt with the Formula