If the pK_a of HCHO₂ is 3.74 and the pH of an HCHO₂/NaCHO₂solution is 3.89,which of the following is true? A)[HCHO₂] [NaCHO₂] D)[HCHO₂] [NaCHO₂] E)It is not possible to make a buffer of this pH from HCHO₂ and NaCHO₂.

Question

If the pK_a of HCHO₂ is 3.74 and the pH of an HCHO₂/NaCHO₂solution is 3.89,which of the following is true? A)[HCHO₂] < [NaCHO₂] B)[HCHO₂] = [NaCHO₂] C)[HCHO₂] > [NaCHO₂] D)[HCHO₂] >> [NaCHO₂] E)It is not possible to make a buffer of this pH from HCHO₂ and NaCHO₂.

Quizplus · Accepted Answer

The pH is greater than the pKa, indicating that the solution is more basic, meaning the concentration of the conjugate base [NaCHO2] is greater than the concentration of the acid [HCHO2].

If the PKa of HCHO2 Is 3

If the PK_a of HCHO₂ Is 3