determine the molar soulbility of Ca3PO42 if Ksp is 12E29Sol

determine the molar soulbility of Ca3(PO4)2 if Ksp is 1.2E-29

given salt is A3B2 type salt

ksp =(3s)^3x(2s)^2

where s is solubility of salt

given ksp=1.2x10^-29

ksp=27s^3x4s^2

=108s^5

s^5=ksp/108

s=(ksp/108 )^1/5

s=(1.2x10^-29/108)^1/5

answer is s=(0.1)^1/5x10^-6