Chapter 15, Problem 45E

Write an equilibrium expression for each chemical equation involving one or more solid or liquid reactants or products.

a. ${\text{PCl}}_5(g)\rightleftharpoons {\text{PCl}}_{\text{3}}(l)+{\text{Cl}}_{\text{2}}(g)$

b. $\text{2}{\text{KClO}}_3(s)\rightleftharpoons 2\text{KCl}(s)+3{\text{O}}_{\text{2}}(g)$

c. $\text{HF}(aq)+{\text{H}}_{\text{2}}\text{O}(l)\rightleftharpoons {\text{H}}_{\text{3}}{\text{O}}^{\text{+}}(aq)+{\text{F}}^{-}(aq)$

d. ${\text{NH}}_3(aq)+{\text{H}}_{\text{2}}\text{O}(l)\rightleftharpoons {\text{NH}}_{\text{4}}{}^{\text{+}}(aq)+{\text{OH}}^{-}(aq)$