Question

The solubility product of a sparingly soluble salt AX2 is 3.2×10−11. Its solubility (in moles/litre) is:-

Answer 1

let the solubility be x,

AX2=A+ +2X-

S. 2S

ksp=s×(2s)^2

=4s^3

3.2×10-11=4s^3

8×10-12=s^3

s=2×10-4