Which answer choice below shows an incorrect pairing of an acid and its conjugate base?

Question

H2O, OH-

HC2H3O2, C2H3O2-

HF, F+

HNO3 , NO3-

Answer 1

H2O, OH- This is a correct pair

HC2H3O2, C2H3O2- This is a correct pair

HF, F+ This is NOT a correct pair. The correct pair would be HF and F-

HNO3 , NO3- This is a correct pair