Calcium hydroxide, Ca(OH)2, dissolves in water to the extent of 1.78 g per liter. What is the value of Ksp for Ca(OH)2?

Answer 1

mols Ca(OH)2 = 1.78/74.09 = about 0.024
M = mols/L = about 0.024M

........Ca(OH)2 ==> Ca^2+ + 2OH^-
I.......solid........0........0
C.......solid........x........2x
E.......solid........x........2x

Ksp = (Ca^2+)(OH^-)^2 = ?
(x)(2x)^2 = (0.024)(2*0.024)^2 = Ksp = ?
You need to go through the math and clean up the numbers. Mine are just estimates.