Question

Can you tell me what the acids/bases and conjugate acids/bases are?

HF(aq)+SO42-(aq) <--> F-(aq) + HSO4-(aq)

Answer 1

HF (hydrofluoric acid) is a weak acid.
SO4 2- (sulfite ion) is a weak base
F- (fluoride anion) is a very weak base
HSO4 - (hydrogen sulfate) is a weak acid

Conjugate acid of HF = H2F+ (dihydrogen fluoride)
Conjugate base of HF = F- (fluoride)

Conjugate acid of SO4 2- = HSO4- (hydrogen sulfite)
SO4 2- does not have a conjugate base because you can't take away any H+

Conjugate acid of F- = HF (hydrofluoric acid)
F- does not have a conjugate base because you can't take away any H+

Conjugate acid of HSO4- = H2SO4 (sulphuric acid)
Conjugate base of HSO4- = SO4 2- (sulfite)

Answer 2

In very simple words:
Conjugate acid --> you add an H+
Conjugate base --> you take away an H+

Answer 3

Okay, thank you for explaining that to me! It makes a lot more sense.