In the equation
HF + H2O H3O+ + F−
A. H2O is a base, and HF is its conjugate acid.
B. H2O is an acid, and HF is the conjugate base.
C. HF is an acid, and F− is its conjugate base.
D. HF is a base, and H3O+ is its conjugate acid.
E. HF is a base, and F− is its conjugate acid.
Answer: HF is an acid, and F- is its conjugate base