Question

Provide the Bronstead-Lowry de finition for an "Acid" and a "Base"

Answer 1

According to the Bronsted-Lowry conjugate acid-base theory, an acid is defined as a substance which looses donates protons and thus forming conjugate base and a base is defined as a substance which accepts protons and thus forming conjugate acid.

For example:

`H_3BO_3(aq.)+HS^-(aq.)\rightarrow H_2BO_3^-(aq.)+H_2S(aq.)`

Here,
`H_3BO_3` is loosing a proton, thus it is considered as a bronsted acid and after losing a proton, it forms
`H_2BO_3^-` which is a conjugate base.

And,
`HS^-` is gaining a proton, thus it is considered as a bronsted base and after gaining a proton, it forms
`H_2S` which is a conjugate acid.

The sequence of the acids and bases in the above equation are:

`Acid+Base\rightarrow Base+Acid`