Question

6. Which of the following chemical reactions is most likely to have the largest equilibrium constant K?

CH3COO- (aq) + H2O(l) = CH3COOH(aq) + OH-(aq)

HCl(aq) + H2O(l) = H3O+(aq) + Cl-(aq)

CH3COOH(aq) + H2O(l) = CH3COO- (aq) + H3O+(aq)

H3PO4(aq) + NH3(aq) = H2PO4-(aq) + NH4+(aq)

Answer 1

The answer to this question is HCl(aq) + H2O(l) = H3O+(aq) + Cl-(aq). HCl is considered a strong acid meaning it is 100% ionized in solution. The equilibrium constant is therefore very large.