What is the ph of a solution prepared by dissolving 0.30 grams of solid CaO line...

Cmp08pitcher

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8 years ago

What is the ph of a solution prepared by dissolving 0.30 grams of solid CaO line...

What is the ph of a solution prepared by dissolving 0.30 grams of solid CaO line in enough water to make 2.00l of aqueous ca(oh)2 limewater

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habiba

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Staff Member

8 years ago

CaO(s) + H2O(l) Rightwards Arrow

Ca(OH)2(aq)

i.e. one mol of the oxide gives two mol hydroxide ions in solution. So calculate the number mol oxide you start with to find the mol OH-

Then find [OH-] = mol OH-/2.00L

finally calculate pOH and then pH = 14 - pOH

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