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Question

The conjugate acid of $${ H }_{ 2 }{ PO }_{ 4 }^{ - }$$ is:

A

$$H_3PO_4$$

B

$${ HPO }_{ 4 }^{ 2- }$$

C

$${ PO }_{ 4 }^{ 3- }$$

D

$${ H }_{ 3 }{ PO }_{ 3 }$$

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Solution

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Correct option is B. $${ HPO }_{ 4 }^{ 2- }$$

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Similar Questions

Q1

The conjugate base of

H_{2} {P O}_{4}^{-}

is:

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Q2

First ionization of phosphoric acid is:

H_{3} {P O}_{4} ⇌ H_{3} {P O}_{4}^{-} + H^{+}

p K_{a_{1}} = 2.21

The dissociation constant of conjugate base of

H_{3} {P O}_{4}

will be:

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Q3

(a) Mention conjugate base of each of the following:

H S^{-}, H_{3} O^{+}, H_{2} {P O}_{4}^{-}, H {S O}_{4}^{-}, H F, {C H}_{3} C O O H, C_{6} H_{5} O H, H C l O_{4}, {N H}_{4}^{+}

(b) Mention the conjugate acid of each of the following:

{O H}^{-}, {C H}_{3} C O O^{-}, {C l}^{-}, {C O}_{3}^{2 -}, H_{2} {P O}_{4}^{-}, {C H}_{3} {N H}_{2}, {C H}_{3} C O O H, {N H}_{2}^{-}

(c) Which of the following behave both as Bronsted acids as well as Bronsted bases?

H_{2} O, H {C O}_{3}^{-}, H_{2} {S O}_{4}, H_{3} {P O}_{4}, H S^{-}, {N H}_{3}

(d) Which is stronger acid in each of the following pairs?

H C l, H I; H_{2} {C O}_{3}, H_{2} {S O}_{4}; H_{2} O, H_{2} S; C_{2} H_{5} O H, C_{6} H_{5} O H

(e) Which is stronger base in each of the following pairs?

{O H}^{-}, {C l}^{-}; {O H}^{-}, {N H}_{2}^{-}; {O H}^{-}, {C H}_{3} C O O^{-}; {C H}_{3} C O O^{-}, {C l}^{-}; {N H}_{3}, {C H}_{3} {N H}_{2}

(f) Classify the following into acids and bases according to Lewis concept:

S^{2 -}, H^{+}, {O H}^{-}, B F_{3}, {N i}^{2 +}, N F_{3}, A l {C l}_{3}, S n {C l}_{4}, {N H}_{3}, {({C H}_{3})}_{2} O

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Q4

What is the conjugate acid of

{H_{2} {P O}_{4}}^{2 -}

?

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Q5

Conjugate base of

H_{3} {P O}_{4}

?

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