JAMB Chemistry 2016 Paper

Concept:A strong acid–strong base titration has a very sharp pH rise and its equivalence point is at $\mathrm{pH} = 7$.Explanation:The curve starts at a low $\mathrm{pH}$, typical of a strong acid.As the base is added, the $\mathrm{pH}$ rises slowly at first, then changes sharply at the equivalence point.The sharp break at $\mathrm{pH} = 7$ is the characteristic feature of a strong acid reacting with a strong base.Answer: A. Strong acid and strong base