Above what Fe2 concentration will Fe(OH)2 precipitate from a buffer solution that has a pH of 8.03
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Above what Fe2 concentration will Fe(OH)2 precipitate from a buffer solution that has a pH of 8.03

[From: ] [author: ] [Date: 12-04-10] [Hit: ]
!pH + pOH = 14.pOH = 5.[OH-] = 10^-pOH = 1.Ksp = [Fe2+][OH-]^2 = 4.[Fe2+] = 4.......
The Ksp of Fe(OH)2 is 4.87×10-17 M3.

Please Help!!

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Use the pH to calculate pOH and then [OH-]:

pH + pOH = 14.00
pOH = 5.97

[OH-] = 10^-pOH = 1.07 X 10^-6 M

Ksp = [Fe2+][OH-]^2 = 4.87 X 10^-17

[Fe2+] = 4.24X10^-5 M
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