Question

Sleeping pills often contain barbital, which is weakly acidic (pKa = 8.0). For analysis of the barbital content of a sleeping pill, a titration is carried out with a strong base. It takes 12.00 mL of 0.200 M base to reach the stoichiometric point. If the initial acid concentration is 0.0120 M and the solution volume is 200 mL, what is the pH of the solution after adding the following volumes? (a) 0.0 mL; (b) 5.0 mL; (c) 12.00 mL; (d) 13.0 mL.

Answer 1