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September 5, 2015

Homework Help: chemistry buffers

Posted by ron on Sunday, September 9, 2012 at 4:28pm.

What molar ratio of HPO4 2- to H2PO4 - in solution would produce a pH of 7.0? Phosphoric acid (H3PO4), a triprotonic acid, has pKa values: 2.14, 6.86, and 12.4. Only one of the pKa values is relevant here. how do i know which pka value to use.. please explain

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