Problem: What would be the pH of a buffer that is 1.5 M in H 2CO3 and 1.0 M in NaHCO3?

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We are asked to calculate the pH of a solution that is 1.5 M in H2CO3  and 1.0 M in NaHCO3.

Recall that H2COis a diprotic acid which can donate two protons, [H+], in solution. We get the dissociation of H2COin water as follows:

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What would be the pH of a buffer that is 1.5 M in H 2CO3 and 1.0 M in NaHCO3?