Question

Which substance is an Arrhenius acid?
(1) LiF(aq) (3) Mg(OH)2(aq)
(2) HBr(aq) (4) CH3CHO

Answer 1

HBr (aq) is an Arrhenius acid.
The equation is HBr(aq) -> H+ + Br-

Answer 2

Answer: Option (2) is the correct answer.

Step-by-step explanation:

Arrhenius acid are the species that donate a
`H^(+)` ion or proton.

For example,
`HBr \rightarrow H^(+) + Br^(-)`

Whereas LiF,
`Mg(OH)_(2)`, and
`CH_(3)CHO` are the substances which do not give a proton upon dissociation. Hence, they are not Arrhenius acids.

Therefore, we can conclude that
`HBr(aq)` substance is an Arrhenius acid.