The equilibrium concentration of phosphate ion in a saturated chromium(III) phosphate solution is

1 answer

....CrPO4 ==> Cr^3+ + PO4^3-
I...solid.....0........0
C...solid.....x........x
E...solid.....x........x

Substitute the E line into Ksp expression for CrPO4 and solve for x = solubility.