If the pK_aof HCOOH is 3.74 and the pH of an HCOOH/HCOONabuffer solution is 3.89, which of the following is TRUE? A) [HCOOH] [HCOONa] D) [HCOOH] [HCOONa] E) [HCOOH]

Question

If the pK_aof HCOOH is 3.74 and the pH of an HCOOH/HCOONabuffer solution is 3.89, which of the following is TRUE? A) [HCOOH] < [HCOONa] B) [HCOOH] = [HCOONa] C) [HCOOH] > [HCOONa] D) [HCOOH] >> [HCOONa] E) [HCOOH] << [HCOONa]

Quizplus · Accepted Answer

The pH of the buffer solution is higher than the pKa, indicating that the concentration of the conjugate base (HCOONa) is greater than the concentration of the acid (HCOOH).

If the PKa of HCOOH Is 3

If the PK_aof HCOOH Is 3