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Topic: calculating Ksp from solubility  (Read 4540 times)

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Offline kerilynn

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calculating Ksp from solubility
« on: August 14, 2008, 12:13:05 PM »
The solubility of cobalt (II) sulfide, CoS, is 1.7 X 10 ^ - 13 M. Calcuate the solubility product constant for CoS.

I cannot figure this problem out

PLEASE HELP
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Offline Astrokel

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Re: calculating Ksp from solubility
« Reply #1 on: August 14, 2008, 12:27:34 PM »
hey kerilynn!

The molar concentration of CoS is known, therefore you know the molar concentration of the ions, so just put the values into the Ksp of CoS.
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Offline kerilynn

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Re: calculating Ksp from solubility
« Reply #2 on: August 14, 2008, 02:02:14 PM »
Iam still not understanding what to do here!!!
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Offline Astrokel

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Re: calculating Ksp from solubility
« Reply #3 on: August 14, 2008, 02:47:19 PM »
From the solubility of CoS, what do you know about the concentration of Co2+ and S2-? Therefore are you able to calculate the Ksp of CoS? (Write out the Ksp expression)
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