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You add an excess of Ca(OH)2 to water maintained at a particular temperature, stir until the solution is saturated, filter, then determine the [OH?] in the solution by titration with acid. Titration of 25 mL of the calcium hydroxide solution to the endpoint requires 12.15 mL of 0.070M HCl solution. a) What is the millimolar quantiy of OH? in the 25 mL of solution? b) What are the concentrations of Ca2+ and OH?? c) What is the solubility of Ca(OH)2 under these conditions? (Expressed as g/dL). d) What is the Ksp for Ca(OH)2 under these conditions?

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