Which equilibrium can be described as an acid-base reaction using… - Vidyadip

MCQ

Which equilibrium can be described as an acid-base reaction using the Lewis acid-base definition but not using the Bronsted-Lowry definition?

A
$2NH_3 + H_2SO_4 \rightleftharpoons 2NH_4^+ + SO_4^{2-}$
B
$NH_3 + CH_3COOH \rightleftharpoons NH_4^+ + CH_3COO^-$
C
$H_2O + CH_3COOH \rightleftharpoons H_3O^+ + CH_3COO^-$
✓
$[Cu(H_2O)_4]^{2+} + 4 NH_3 \rightleftharpoons [Cu(NH_3)_4]^{2+} + 4H_2O$

✓

Answer

Correct option: D.

$[Cu(H_2O)_4]^{2+} + 4 NH_3 \rightleftharpoons [Cu(NH_3)_4]^{2+} + 4H_2O$

d
$[Cu(H_2O)_4]^{2+} + 4NH_3 \rightleftharpoons [Cu(NH_3)_4]^{2+} + 4H_2O$ involves lose and gain of electrons. $H_2O$ is coordinated to $Cu$ by donating electrons $(LHS)$. It is then removed by withdrawing electrons.

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