Which of the following are conjugate acid/base pairs? select all that apply.
hcooh and hcoo-
hno3and no3-
h2so4 and so42-
nacl and naoh
h2co3 and co32-

and

and

and

and

Explanation:

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 the given chemical equations:

1.

Here, is loosing a proton, thus it is considered as an acid and after losing a proton, it forms which is a conjugate base.

2.

Here, is loosing a proton, thus it is considered as an acid and after losing a proton, it forms which is a conjugate base.

3.

Here, is loosing a proton, thus it is considered as an acid and after losing a proton, it forms which is a conjugate base.

4. and are not conjugate acid/ base pairs.

5.

Here, is loosing a proton, thus it is considered as an acid and after losing a proton, it forms which is a conjugate base.

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