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A buffer with a pH of 4.15 contains 0.23 M of sodium benzoate and 0.26 M...

A buffer with a pH of 4.15 contains 0.23 M of sodium benzoate and 0.26 M of benzoic acid. What is the concentration of [H ] in the solution after the addition of 0.058 mol of HCl to a final volume of 1.3 L? Assume that any contribution of HCl to the volume is negligible.

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