Asked by Symone

Given .300 L of a buffer solution that is .250 M HC2H3O2 and .50 M NaC2H302, what is the new pH if .0060 mol HCL is added? what about .0060 mol NaOH?
Answered by DrBob222
The Henderson-Hasselbalch equation works all buffer problems.
Answered by Symone
i see that the equation is pH=pKa+log[base]/[acid]. but i do not know how to get pKa
Answered by DrBob222
The acid is acetic acid. Either in your problem or in your text the Ka should be listed as close to 1.8E-5 which is a pKa of 4.74 (pKa = -log Ka). Use the value in your text or notes, not the one I used. The base is acetate. The acid is acetic acid in the HH equation.
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