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.

answer: the figure is attached herewith.

step-by-step explanation:   we are given to sketch a unit circle and label the terminal points corresponding to

in the attached figure, we have drawn a unit circle, with centre at o(0,0) and radius 1 unit. we have labelled the points a, b, c, d and e corresponding to the angles below

∠aox = 60°,

∠box = 120°,

∠cox = 180°,

∠dox = 240°,

∠eox = 300°.

and the coordinates are a(0.5,1), b(-0.5,1), c(-1,0), d(-0.5,-1) and e(0.5,-1).

thus, the answer is complete.

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