Write an expression for the solubility-product constant of A2B(s). Assume that an ion of B has a charge of 2– (that is, B2−).
We have to write the expression of solubility product for A2B, where the charge B is -2 i.e B2-
The equation can be written as ,A2B 2A+ + B2-
Kc = [A+]2 [B2-]
Kc [A2B] = [A+]2 [B2-]
Ksp = [A+]2 [B2-]