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tiggrulz13
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Homework Statement
What is the solubility (gram/liter) of Cr(OH)3 (103.02 g/mol) in a solution buffered at pH = 8.673? The pKsp of Cr(OH)3 is 30.220.
Homework Equations
Ksp = [Cr][OH]^3
Cr(OH)3 -> Cr + 3OH
The Attempt at a Solution
I have already solved that Ksp = 6.0256 E -31, but I'm not entirely sure what to do with the buffer pH. I tried using it to find the pOH and subsequently [OH], but for some reason I'm not getting the right answer. Do I plug [OH] into the Ksp equation after finding out the concentration using the pH or is there a step I'm missing?