You wish to prepare an HC₂H₃O₂ buffer with a pH of 5.24.If the pK_a of is 4.74,what ratio of C₂H₃O₂⁻/HC₂H₃O₂ must you use? A) 0.10 B) 0.50 C) 0.32 D) 3.16 E) 7.0

Question

Quizplus · Accepted Answer

The Henderson-Hasselbalch equation is used to calculate the ratio of the concentrations of the conjugate base to the acid: pH = pKa + log([A-]/[HA]). Solving for the ratio: 5.24 = 4.74 + log([A-]/[HA]), gives [A-]/[HA] = 3.16.

You Wish to Prepare an HC2H3O2 Buffer with a PH

You Wish to Prepare an HC₂H₃O₂ Buffer with a PH