You have a 4.5 M solution of #Ca(OH)_2# What is the concentration of #OH#?

1 Answer
anor277
Jun 14, 2016

#Ca(OH)_2(s) rightleftharpoons Ca^(2+) + 2HO^-#

The solution is nominally #9.0# #mol*L^-1# with respect to hydroxide.

Explanation:

Of course, we should probably look at the solubility of calcium hydroxide in water, and I think it's a sparingly soluble salt.

This site reports that #K_(sp)# #Ca(OH)_2#, #=5.5xx10^-6#.

Calcium hydroxide is thus much too insoluble to support such a concentration. The question is unrealistic.

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