Chapter 14.2, Problem 14.5P

If you mix equal concentrations of reactants and products, which of the following reactions proceed to the right and which proceed to the left?

 (a)     $\text{HF}\left(aq\right)+{\text{NO}}_3{}^{-}\left(aq\right)\rightleftharpoons {\text{HNO}}_3\left(aq\right)+{\text{F}}^{-}\left(aq\right)$

(b)     ${\text{NH}}_{\text{4}}{}^{+}\left(aq\right)+{\text{CO}}_3{{}^2}^{{}^{-}}\left(aq\right)\rightleftharpoons {\text{HCO}}_3{}^{-}\left(aq\right)+{\text{NH}}_{\text{3}}\left(aq\right)$