Question

Which of the following comments about the following equilibrium reaction is the most correct?
$H_{2}SO_{4} (aq) + NH_{3} (aq) {\rightleftharpoons} HSO^{-}_{4} (aq) + NH^{+}_{4} (aq)$

• A. The equilibrium lies mostly to the right
• B. The equilibrium lies mostly to the left
• C. The equilibrium is exactly in between where the concentration of each of the reactants is exactly equal to the concentration of each of the products
• D. The equilibrium depends on the temperature of the equilibrium reaction

Answer 1

Answer: (A)

$H _{2} SO _{4}$ when dissolved in water dissociates almost completely and produces a large number of $H ^{+}$ ions. These $H ^{+}$ ions are taken by $NH _{3}$ and its conjugate acid $NH _{4}^{+}$ is formed. Thus, the equilibrium lies to the right side or forward reaction.

$H _{2} SO _{4}(a q)+ NH _{3}(a q) \rightleftharpoons$

$HSO _{4}^{-}(a q)+ NH _{4}^{+}(a q)$