Question

A student was required to prepare 250.0 mL of a hypochlorous acid/sodium hypochlorite buffer in which the concentration of the weak acid component was 0.076 M and the concentration of the conjugate base was 0.055 M. The student was supplied with 0.393 M hypochlorous acid and 1.0M NaOH to perform this task. What volume (in L) of the acid would the student need to prepare this buffer solution? Hint: assume that all of the conjugate base comes directly from the reaction of NaOH with the weak acid (in other words, there is negligible dissociation of the weak acid).

          A student was required to prepare 250.0 mL of a hypochlorous
acid/sodium hypochlorite buffer in which the concentration of the
weak acid component was 0.076 M and the concentration of the
conjugate base was 0.055 M. The student was supplied with 0.393 M
hypochlorous acid and 1.0M NaOH to perform this task. What volume
(in L) of the acid would the student need to prepare this buffer
solution?
Hint: assume that all of the conjugate base comes directly from
the reaction of NaOH with the weak acid (in other words, there is
negligible dissociation of the weak acid).

Added by Ray H.

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