If the pKa of HCHO₂ is 3.74 and the pH of an HCH(O₂)/(N)aCHO₂ solution is 3.11, what is true?
A) [HCHO₂] < [NaCHO₂]
B) [HCHO₂] = [NaCHO₂]
C) [HCHO₂] > [NaCHO₂]
D) Unable to determine from the information provided