Thank you for responding, but I am not sure how to solve this yet. I am sorry. Could you show me a more of the work needed? I teach high school chemistry, and it is beginning to look like the question is beyond the scope of the course, but now I am curious how to solve it. Anyways, thanks for your help regardless David Westra You have two bottles, one filled with 1M HAc (HAc = acetic acid) and one filled with 1M NaOH. You want to make 100ml of a buffer with pH=4.6 by mixing together appropriate amounts of these solutions. How much of each solution do you use?