The dark blue colour of the solution formed when excess of ammonia is added

The Dark Blue Colour Of The Solution Formed When Excess Chemistry Question

The dark blue colour of the solution formed when excess of ammonia is added to a solution of copper (II) sulphate is due to the presence of the ion

Options

(a) [Cu(OH)₄(H₂O)₂]²⁻
(b) [Cu(H₂O)₆]²⁺
(c) [Cu(NH₄)₂(H₂O)₄]⁴⁺
(d) [Cu(NH₃)₄(H₂O₂)]²⁺

Correct Answer:

[Cu(NH₃)₄(H₂O₂)]²⁺

Explanation:

when excess of ammonia is added to a solution of copper (II) sulphate, then the complex compound, [Cu(NH₃)₄(H₂O₂)]SO₄ is formed which causes the formation of deep blue colour.

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Topics: Coordination Compounds (87)
Subject: Chemistry (2512)

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