If NaH₂PO₄ is added to water, what other compound or compounds could also be added in order to make a buffered solution? A)H₃PO₄only B)NaHPO₄only C)Na₂HPO₄only D)Na₂PO₃only E)either H₃PO₄ or Na₂HPO₄

Question

Quizplus · Accepted Answer

In order to make a buffered solution, a weak acid and its corresponding conjugate base or a weak base and its corresponding conjugate acid must be present. NaHS and Na2HPO4 are a conjugate acid-base pair, so adding either HS- or HPO42- to the solution along with NaHS will create a buffered solution. Therefore, the best choice is either HS- or HPO42- along with NaHS, which is option E.

If NaH2PO4 Is Added to Water, What Other Compound or Compounds

If NaH₂PO₄ Is Added to Water, What Other Compound or Compounds