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Question: Answered & Verified by Expert
Aqueous ammonia readily dissolves $\mathrm{AgCl}$ because
ChemistryCoordination CompoundsTS EAMCETTS EAMCET 2018 (04 May Shift 2)
Options:
  • A $\mathrm{NH}_3$ molecules readily solvate $\mathrm{Ag}^{+}$and $\mathrm{Cl}^{-}$ions
  • B $\mathrm{NH}_3$ molecules abstract chloride from $\mathrm{AgCl}$ to form $\mathrm{NH}_4 \mathrm{Cl}$
  • C a soluble complex $\mathrm{Ag}\left(\mathrm{NH}_3\right)_6^{+}$is formed
  • D a soluble complex $\mathrm{Ag}\left(\mathrm{NH}_3\right)_2^{+}$is formed
Solution:
1713 Upvotes Verified Answer
The correct answer is: a soluble complex $\mathrm{Ag}\left(\mathrm{NH}_3\right)_2^{+}$is formed
$\mathrm{AgCl}$ is soluble in ammonia because it forms complex $\left[\mathrm{Ag}\left(\mathrm{NH}_3\right)_2\right]^{+}$with ammonia. Formation of this complex make it like ionic, therefore it is soluble in aqueous ammonia.
$$
\mathrm{AgCl}+2 \mathrm{NH}_4 \mathrm{OH} \longrightarrow \mathrm{Ag}\left(\mathrm{NH}_3\right)_2^{+}+\mathrm{H}_2 \mathrm{O}+\mathrm{Cl}^{-}
$$
(Highly soluble)

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