Question

Which of the following will produce a buffer solution when mixed in equal volumes?

• A. $0.1mold{m}^{-3}$ $N{H}_{4}OH$ and $0.1mold{m}^{-3}$ $HCl$.
• B. $0.05mold{m}^{-3}$ $N{H}_{4}OH$ and $0.1mold{m}^{-3}$ $HCl$.
• C. $0.1mold{m}^{-3}$ $N{H}_{4}OH$ and $0.05mold{m}^{-3}$ $HCl$.
• D. $0.1mold{m}^{-3}$ $C{H}_{4}COONa$ and $0.1mold{m}^{-3}$ $NaOH$.

Answer 1

The correct option is C $0.1mold{m}^{-3}$ $N{H}_{4}OH$ and $0.05mold{m}^{-3}$ $HCl$.

$0.1mold{m}^{-3}$ $N{H}_{4}OH$ and $0.05mold{m}^{-3}$ $HCl$.

As a mixture of ammonium chloride and ammonium hydroxide acts as a buffer around pH $9.25$.