Sorry. The title should read finding volume with little information. Humongous typo :) 1. The problem statement, all variables and given/known data Suppose you are given 0.50 liter of 0.500 M acetic acid, and 0.50 liter of 0.250 liter sodium acetate. What is the maximum volume of buffer solution that you can make if the buffer must have a pH of 4.58? Ka for acetic acid is 1.8 x 10-5 2. Relevant equations pH=pKa + log([A-]/[HA]) 3. The attempt at a solution I've gotten up to this point so far, 0.69= [A-]/[HA] 0.69= (0.125/x)/(0.25/x) What I don't know is how I should go about from here to get the volume(x).