Posted by Anonymous on Tuesday, March 18, 2008 at 11:06pm.
In the absence of other information (temperature) write molecular formula for calcium hydroxide and complete the word equation below as a chemical equation.
calcium hydroxide = calcium ions + hydroxide ions
This will tell you how many moles of hydroxide ions are associated with one mole of calcium ions.
Use [H+]=10^-pH to calculate the [H+]
The use 10^-14=[H+][OH-] to calculate [OH-]
Then knowing how many moles of hydroxide ions are associated with one mole of calcium ions you can calclate [Ca2+]
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