fiN Posted May 17, 2008 Posted May 17, 2008 problem: What is the pH of a solution made by combining equal volumes of 0.100 M sodium propanoate and 0.100 M propanoic acid? (the Ka of propanoic acid (HC3H5O2) is 1.3 x 10^-5) Can I use the Henderson-Hasselbalch equation? If I do, for the [A-]/[HA] part of the equation, could I plug in (0.200 M C3H5O2- / 0.100 M HC3H5O2) ?
John Cuthber Posted May 18, 2008 Posted May 18, 2008 "Can I use the Henderson-Hasselbalch equation?" Yes. "could I plug in (0.200 M C3H5O2- / 0.100 M HC3H5O2) ?" only if you can explain where you got 0.200M from.
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