SATHEE: Equilibrium Question 88

Equilibrium Question 88

Question: Which of the following species is an acid and also a conjugate base of another acid [NCERT 1981]

Options:

A) $H S O_{4}^{-}$

B) $H_{2} S O_{4}$

C) $O H^{-}$

D) $H_{3} O^{+}$

Show Answer

Answer:

Correct Answer: A

Solution:

$H_{2} S O_{4}$ ⇌ $H^{+} + H S O_{4}^{-}$ ⇌ $H^{+} + S O_{4}^{-, -}$

$H S O_{4}^{-}$ is conjugate base. But it is also an acid because it lose $H^{+}$ .

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