Suppose that you first titrated 25.0 ml of 0.500 M HCl with 0.500 M NaOH and then 25.0 ml of 0.500 M of your weak acid HA with 0.500 M NaOH. The weak acid HA could be _______.
a) Acetic acid
b) Hydrochloric acid
c) Sulfuric acid
d) Nitric acid