Question

The next three (3) problems deal with the titration of 541 mL of 0.501 M carbonic acid (H2CO3) (Ka1 = 4.3 x 10-7, Ka2 = 5.6 x 10-11) with 1.5 M KOH.

3. How many mL of the 1.5 M KOH are needed to raise the pH of the original carbonic acid solution to a pH of 6.755? Give your answer to one decimal place.