A- Is a Weak Base

Multiple Choice

A- is a weak base. Which equilibrium corresponds to the equilibrium constant K_a for HA?

A) HA (aq) + H₂O (l) H₂A⁺ (aq) + OH^- (aq)
B) A^- (aq) + H₃O⁺ (aq) HA (aq) + H₂O (l)
C) HA (aq) + H₂O (l) H₃O⁺ (aq) + A^- (aq)
D) A^- (aq) + H₂O (l) HA (aq) + OH^- (aq)
E) A^- (aq) + OH^- (aq) HOA^2- (aq)