Question

How do I find OH- and Ca2+ in equlibrium, Molar Solubility, and Ksp of the following?
A. Molar Solubility and Solubility Product of Calcium Hydroxide
1. Conc of standardized HCl solution (mol/L) = 0.05 mol/L
2. Buret reading, initial (mL) = 0.00 mL
3. Buret reading, final (mL) = 30.80 mL
4. Volume of HCl added (mL) = 30.80
5. Amount og HCl added (mol) = .02 mol
6. Amount of OH- in satd solution (mol) = .038 mol
7. Volume of satd Ca(OH)2 solution (mL) = 25.0 mL
8. [OH-], equilibrium (mol/L) = ?
9. [Ca2+], equilibrium (mol/L) = ?
10. Molar solubility of Ca(OH)2 = ?
11. Ks