The solubility product of a sparingly soluble salt AX ₂ is 3.2 10⁻⁸ . What is it's solubility in mol dm ⁻³

Step-by-step solution

aligned & Ksp = [ A ²⁺ ] [ X ⁻ ]^2 & = S (2 ~S )^2 & =4 ~S ^3 & 3.2 10⁻⁸ 4 ~S ^3 & ~S ^3= 32 4 10⁻⁹=8 10⁻⁹ & ~S =2 10⁻³ ~mol . dm ⁻³ . & aligned