QUESTION 12
In the reaction $HCO_3^- + HPO_4^{2-} \rightleftharpoons H_2CO_3 + PO_4^{3-}$, the Brønsted acid is
conjugate acid of the Brønsted base is
and the Brønsted base is
?. The
and the conjugate base of the Brønsted acid is
QUESTION 13
A solution of 0.25 M butyric acid has a pH of 2.71. What is the $K_a$ for the acid?