What is the molar solubility of Sr3(AsO4)2 and the concentration of Sr^+2 and AsO4^-3 in a saturated solution at 25C? the Ksp is 1.3 E -18. Show the balanced reaction.

Answer 1

........Sr3(AsO4)2 ==> 3Sr^2+ + AsO4^2-
initial....0.............0........0
change..................3x.......2x
equil...................3x.......2x
Ksp = (Sr^2+)^3(AsO4^2-)^2
Substitute and solve for x, then 2x and 3x.