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Offline alexlinftw

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Question about a final question
« on: May 12, 2010, 03:59:47 AM »
I had a question on my General Chem 2 Final about concentration and solubility:

I think it went something like this "If .1M of Ca(OH)2 was added to a Ca(OH)2 solution, what would happen to solubility? (Ksp of Ca(OH) = some number)"

The answer choices were raise, lower, or not change. I put that it would not change, but I'm not totally sure, could anyone please explain this to me?

I know that the Qsp = [Ca][OH]^2 but does that actually change the solubility?

Thanks,
-Alex Lin

Offline AWK

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Re: Question about a final question
« Reply #1 on: May 12, 2010, 08:25:40 AM »
Quote
If .1M of Ca(OH)2 was added to a . Ca(OH)2 solution, what would happen to solubility? (Ksp of Ca(OH).= some number)"

Something is missing
AWK

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Re: Question about a final question
« Reply #2 on: May 12, 2010, 08:44:17 AM »
I wonder if it is not a trick question. Amount of dissolved substance may change, but solubility is constant.

It is like asking whether boiling point of water changes after an additional quart is added to a kettle.
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Offline alexlinftw

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Re: Question about a final question
« Reply #3 on: May 12, 2010, 12:07:06 PM »
Quote
If .1M of Ca(OH)2 was added to a . Ca(OH)2 solution, what would happen to solubility? (Ksp of Ca(OH).= some number)"

Something is missing

I'm sorry I can't remember the whole question, the final was like three hours long and really tedious.

I wonder if it is not a trick question. Amount of dissolved substance may change, but solubility is constant.

It is like asking whether boiling point of water changes after an additional quart is added to a kettle.

I see, that's what I thought, thank you.

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