Question

Consider the reaction below.

HF + H2O H3O + F

Which is an acid-conjugate base pair?
A. HF and H3O+
B. HF and F
C. H2O and HF
D. H2O and F

Answer 1

The Bronsted-Lowry Theory of acids and bases
The theory
An acid is a proton (hydrogen ion) donor.
A base is a proton (hydrogen ion) acceptor.
HF is the proton Donor to H2O,H2O is the proton acceptor,But there is also a back reaction between the hydroxonium ion and the F- ion
The H3O+ is an acid because it is donating a proton (hydrogen ion) to the F- ion.

Answer 2

Thank you

Answer 3

your welcome :)