A buffer solution contains 0.052 M HC2H3O2 and 0.025 M NaC2H3O2. The pH of this solution is _____. Ka for HC2H3O2 is 1.8x10-5.

Answer 1

pH=Pka+log[A-]/[HA]
Pka=-log 1.8x10-5

+log (.025/.053)

Divide the concentrations out and take the log of it and add it to the negative log of 1.8x10-5

You can tell HC2H3O2 is the acid because Ka is the constant for the acid, while Kb would be constant for the base. I don't have a calculator handy or I'd check to see if the pH sounded right

Answer 2

Thanks