Correct option (A) CH3COOH(aq) + NH3(aq) → NH4+ + CH3COO– (aq)
Explanation:
Begin by looking at the reactants and determining their dissociation abilities. Acetic acid is a weak acid, therefore, it should be written in the reaction as HC2H3O2(aq) to show that it is dissolved but not fully dissociated. Ammonia is a weak base in solution that also doesn’t have any ions. It must be written as a dissolved molecule, NH3(aq), as well. Next, consider the products. The proton from acetic acid should be moved to the ammonia molecule, making the ionic equation:
HC2H3O2(aq) + NH3(aq) → C2H3O2 – + NH4+
Turning this into a net ionic equation means not doing anything; there are no spectators. Now choose from the responses.