If the PK_a of HCHO₂ Is 3

question 47

Multiple Choice

If the pK_a of HCHO₂ is 3.74 and the pH of an HCHO₂/NaCHO₂ solution is 3.11,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.