GEN CHEM

make 200.0 mL of a pH 5.00 buffer from 0.200 M acetic acid and 0.100 M sodium acetate. Calculate the volume of 0.200 M acetic acid and the volume of 0.100 M sodium acetate required to make 200.0 mL of a buffer solution with pH = 5.00.

The Ka for acetic acid at 298 K is 2.00 x 10-5.

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  1. Let x = mL base
    pH = pKa + log(base)/(acid)
    5.00 = 4.699 + log(0.1x)/(200-x)*0.2
    Solve for x and 200-x

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