1. The problem statement, all variables and given/known data An buffer is made from a 0.1M acid and a 0.25 M salt. According to the equation pH = pKa - log[acid]/[base] the ratio acid:base is 1:2 What volumes are required to make a 1 dm3 solution? 2. Relevant equations 3. The attempt at a solution According to the 1:2 ratio we would need 333.3 cm3 of acid and 666.6 cm3 of base However as the initial concentration of acid to base is 0.1:0.25 we instead say volume acid = 333.3cm3 volume base = 666.6 cm3/2.5 = 266.6 cm3 volume water = 400 cm3 (all of these volumes are rounded to the nearest 0.1 cm3) is this correct?