Write a net ionic equation for the reaction that occurs when aqueous solutions of ammonia and hydrobromic acid are combined.

Answer 1

NH3(aq) + HBr(aq) ==> NH4Br(aq)
NH3(aq) + H^+(aq) + Br^-(aq) ==> NH4^+ (aq) + Br^-(aq)
Now cancel the ions common to both sides, namely Br^- to leave
NH3(aq) + H^+(aq) ==> NH4^+(aq)