WAEC Chemistry 2016 Paper

Concept:The reaction between an acid and a base to form water is called neutralization.Explanation:The hydronium ion, $\mathrm{H_3O^+_{(aq)}}$, is the acidic species present in water.The hydroxide ion, $\mathrm{OH^-_{(aq)}}$, is the basic species provided by a base.These ions combine to produce water molecules: $\mathrm{H_3O^+_{(aq)} + OH^-_{(aq)} \rightarrow 2H_2O_{(l)}}$.Since an acid reacts with a base to give only water and a salt (here, water itself), this is an acid-base neutralization reaction.No electron transfer or oxidation state change occurs, so it is not a redox reaction.Answer:C. Neutralization