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Topic: calculating the pKsp  (Read 6784 times)

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Offline L4R4

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calculating the pKsp
« on: October 07, 2010, 08:34:18 AM »
the solubility in mol/L of M(OH)2 in 0.001M KOH is 9.59*10-10 mol/L. Calculate the pKsp for M(OH)2.
I am having a lot of trouble with this, can anyone please help?
Is there a common ion interaction, even though it isnt a salt?
Or is it a salt.. I honestly don't have a clue and I have been trying to do this for hours.
I would really appreciate some help.
thank you very much

Offline ooosh

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Re: calculating the pKsp
« Reply #1 on: October 07, 2010, 08:43:36 AM »
Do you know the Ksp equation of M(OH)2,if you know,just to find out what you need .
Then your question becomes a multiplication problem.

Offline L4R4

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Re: calculating the pKsp
« Reply #2 on: October 07, 2010, 08:51:35 AM »
Do you know the Ksp equation of M(OH)2,if you know,just to find out what you need .
Then your question becomes a multiplication problem.

what do you mean? like the equilibrium equation?
I have tried to write it up and I don't know how it dissociates  :(

Offline ooosh

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Re: calculating the pKsp
« Reply #3 on: October 07, 2010, 10:24:19 AM »
To calculate the Ksp of M(OH)2,you must the concentration of M2+ and OH- in the solution.

Offline Borek

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Re: calculating the pKsp
« Reply #4 on: October 07, 2010, 10:29:32 AM »
what do you mean? like the equilibrium equation?
I have tried to write it up and I don't know how it dissociates  :(

Write formula for Ksp for Ca(OH)2.
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