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June 30, 2015

Homework Help: AP Chemistry

Posted by Mike on Saturday, March 16, 2013 at 10:41pm.

A biochemist prepares a lactic acid-lactate buffer by mixing 225 mL of 0.85M lactic acid with a Ka=1.38*10^-4 with 435mL of 0.68M sodium lactate. What is the buffer pH?

I know I have to use the equilibrium constant expression, but I'm pretty lost from there. Can someone please explain this for me? Thanks!

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