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Phosphoric acid, H3PO4(aq),H3PO4(aq), is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH, and the concentrations of
Phosphoric acid, H3PO4(aq),H3PO4(aq), is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH, and the concentrations of all species in a 0.500 M0.500 M phosphoric acid solution.
a1Ka1 | a2Ka2 | a3Ka3 |
---|---|---|
6.9x10-3 | 6.2x10-8 | 4.8x10-13 |
[H3PO4]=[H3PO4]=
MM
[H+]=[H+]=
MM
[H2PO4]=[H2PO4]=
MM
[OH]=[OH]=
MM
[HPO24]=[HPO42]=
MM
pH=pH=
[PO34]=[PO43]=
M
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