Ammonia forms the complex [Cu(NH3)4]2+ with copper ions in an alkaline solution, but it fails to form this complex in an acidic solution. What is the primary reason for this behavior?

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Chemistry · Coordination Compounds

Verified Solution4 OptionsUpdated: October 2026👁️1 View

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In an acidic solution, protons coordinate with ammonia molecules to form NH4+ ions, destroying its lone pair.

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Answer 1

Ammonia decomposes spontaneously into nitrogen and hydrogen gases in acidic environments.

Answer 2

Copper hydroxide acts as an amphoteric substance and interferes with complexation.

Answer 3

In an acidic solution, protons coordinate with ammonia molecules to form NH4+ ions, destroying its lone pair.

Answer 4

In an acidic solution, hydration effectively shields and protects Cu2+ ions.

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