Problem- a buffer with a ph of 405 contains 021 m of sodium, Ask an Expert

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Problem- A buffer with a pH of 4.05 contains 0.21 M of sodium benzoate and 0.30 M of benzoic acid. What is the concentration of [H ] in the solution after the addition of 0.052 mol of HCl to a final volume of 1.4 L?

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