Homework Help: Chemistry

Posted by Chem Confused on Monday, April 12, 2010 at 1:45pm.

The Ka values of H3PO4 are shown below.
Ka1 7.5 10-3
Ka2 6.2 10-8
Ka3 4.8 10-13

What is the pH of a 0.19 M solution of NaH2PO4?

Chemistry - DrBob222, Monday, April 12, 2010 at 2:09pm
(H^+) = sqrt(k1k2)
Chemistry - Chem Confused, Monday, April 12, 2010 at 2:28pm
How come it didn't matter what the molarity was? It wasn't used at all.
Chemistry - kody, Monday, April 19, 2010 at 9:03am
same question. why wasn't the molarity used>?

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