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# Determination of pH of a Buffer after Addition of Acid

CHEM-E0TMYJ

A buffer with a pH of $4.34$ contains $0.330 \textrm{ M}$ of sodium benzoate and $0.240 \textrm{ M}$ of benzoic acid.

What is the pH of the solution after the addition of $0.074 \textrm{ mol}$ of $\textrm{HCl}$ to a final volume of $1.30 \textrm{ L}$?

Assume that any contribution of $\textrm{HCl}$ to the volume is negligible.