Question & Answer: To the nearest hundredths, what is the pH at the end of an enzyme-catalyzed reaction…..

To the nearest hundredths, what is the pH at the end of an enzyme-catalyzed reaction if it were carried out in a 0.1 M buffer initially at pH 6.59, and 0.004 M of acid (H+) was produced during the reaction? (The buffer used was a polyprotic acid of the general form: H3A; the three pKas of this polyprotic acid are 2.13, 6.59, and 11.36.)