Wednesday
September 3, 2014

Homework Help: Chemistry

Posted by Aaron on Tuesday, March 25, 2014 at 12:37am.

I don't really understand how to do this problem, or where to start exactly. Can someone explain to me where to start and how I can solve the problem in a step by step process?
Thank you in advance!


1. An acetic acid / sodium acetate buffer solution is also 0.020 M AlCl3. The Ksp of aluminum hydroxide is 3 x 10^-34.

a) At what minimum pH will Al(OH)3 (s) precipitate form this solution?

b) What ratio of acetate ion to acetic acid concentrations ([C2H3O2^-]/[HC2H3O2]) should be maintained to prevent the precipitation of aluminum hydroxide? (Ka acetic acid = 1.7x10^-5).

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