\text{Al} +Al+start text, A, l, end text, plus \text{HCl} \rightarrowHCl→start text, H, C, l, end text, right arrow \text{AlCl}_3 +AlCl 3 +start text, A, l, C, l, end text, start subscript, 3, end subscript, plus \text{H}_2H 2 start text, H, end text, start subscript, 2, end subscript Stuck?Watch a video or use a hint.

According to arrhenius theory of acid and bases, an acid is a proton donor, while base donates hydroxyl ions. further, acid and base reacts to form salt and water.consider following example.hcl    +      h2o          →      cl-          +      h3o+here, hcl has donated a proton, hence it is an acid.now consider following reactionhcl      +      naoh            ↔      nacl      +        h2oin this reaction, hcl donates proton, hence it is acid. on other hand, naoh donates hydroxyl ion (i.e. hence it is a base.