Chemistry - Ionic Equilibrium Question with Solution | TestHub

ChemistryIonic EquilibriumpH of Strong and Weak Acids and BasesMedium2 minPYQ_2022

ChemistryMediumassertion reason

Assertion: The amphoteric behaviour of water is explained by Lewis acid base theory

Reason: water acts as acid with ${NH}_{3}$ and base with $H_{2} S$

Answer:

Solution:

$\underset{Acid}{\underset{⏟}{H_{2} O}} + \underset{Base}{\underset{⏟}{\ddot{N} H_{3}}} \to {}^{-}{OH} + {NH}_{4}^{+}$

$\underset{Base}{\underset{⏟}{H_{2} O}} + \underset{Acid}{H_{2} S} ⟶ H_{3} O^{+} + {HS}^{⊖}$

The amphoteric behaviour of $H_{2} O$ is explained by Brønsted theory not the Lewis acid base theory.

So, we can say Assertion is false, but reason is true.

Stream:JEESubject:ChemistryTopic:Ionic EquilibriumSubtopic:pH of Strong and Weak Acids and Bases

⏱ 2mℹ️ Source: PYQ_2022

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