# chemistry

How many grams of Ca(OH)2 can be dissolved in 550mL of a .0500 M NaOH solution. Ksp - Ca(OH)2 is 5.5 x 10-5

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

..........NaOH ==> Na^+ + OH^-
I.........0.05.....0.......0
C........-0.05....0.05....0.05
E.........0.......0.05....0.05

Substitute the E lines into the Ksp expression and solve for x = (Ca^2+) = [Ca(OH)2] in mols/L.
Note: (Ca^2+) = x
(OH^-) = 2x + 0.05

Convert M Ca(OH)2 (in mols/L) to mols in 550 mL and convert that to grams. g = mols x molar mass = ?

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