Question

Heat of neutralization of a strong acid by a strong base is a constant value because

• A. salt formed does not hydrolyse
• B. only $H^{+}$ and $O{H}^{-}$ ions react in every case
• C. the strong base and strong acid do not react completely
• D. the strong base and strong acid react in aqueous solution

Answer 1

Answer: (B)

For example: $N{a}^{+}+O{H}^{-}+H^{+}+C{l}^{-}\to N{a}^{+}+C{l}^{-}+H_{2}O$

i.e., $H^{+}+O{H}^{-}\to H_{2}O$

Thus heat of neutralization of a strong acid with strong base is constant.