Answer : The expression for solubility constant for this reaction will be,
[tex]K_{sp}=[Ca^{2+}]^3[PO_4^{3-}]^2[/tex]
Explanation :
Solubility product : It is defined as the product of the concentration of the ions that present in a solution raised to the power by its stoichiometric coefficient in a solution of a salt. This takes place at equilibrium only.
The solubility product constant is represented as, [tex]K__{sp}[/tex].
The dissociation of calcium phosphate is written as:
[tex]Ca_3(PO_4)_2\rightleftharpoons 3Ca^{2+}+2PO_4^{3-}[/tex]
The expression for solubility constant for this reaction will be,
[tex]K_{sp}=[Ca^{2+}]^3[PO_4^{3-}]^2[/tex]