When mixed in appropriate amounts,each of the following mixtures can produce an effective buffer solution except _____. A) HCl and NaH₂PO₄ B) Na₂HPO₄ and Na₃PO₄ C) NaHCO₃ and Na₂CO₃ D) NaH₂PO₄ and Na₂HPO₄ E) NaOH and NaF

Question

Quizplus · Accepted Answer

A buffer solution requires a weak acid and its conjugate base, or a weak base and its conjugate acid. Option A has a strong acid, HCl, and its conjugate base, so it cannot produce a buffer solution. Options B and D both have weak acids and their conjugate bases, so they can produce buffer solutions. Option C has a weak acid and a non-conjugate base, so it cannot produce a buffer solution. Option E has neither a weak acid nor a weak base present, so it cannot produce a buffer solution. Therefore, the best choice is E.

When Mixed in Appropriate Amounts,each of the Following Mixtures Can