Select the conjugate acid-base pairs for each reaction in Question 9.1.
a. \mathrm{HF} and \mathrm{F}^{-} ; \mathrm{H}_{2} \mathrm{O} and \mathrm{H}_{3} \mathrm{O}^{+}
b. \mathrm{NH}_{3} and \mathrm{NH}_{4}{ }^{+} ; \mathrm{H}_{2} \mathrm{O} and \mathrm{OH}^{-}