CHEMISTRY · Single correct · A Level · Chemistry · Acids and bases · Acids and bases
Problem
Sorbinic acid, H₂Srb, is diprotic with pKₐ₁ = 4.2 and pKₐ₂ = 8.1. Which pair of solutes, present in similar concentrations, would create the most effective buffer with pH close to 8.1?
(a) H₂Srb and NaHSrb
(b) NaHSrb and Na₂Srb
(c) HCl and NaCl
(d) H₂Srb and Na₂Srb