Gce Model Questions Vol1 2019 Chemistry Question 2

Practice essay / theory question 2 from the 2019 Gce Model Questions Vol1 Chemistry examination. This question covers periodic table, transition metals, coordination chemistry .

Gce Model Questions Vol1 2019 Chemistry Essay / Theory
Topics: periodic table transition metals coordination chemistry
Question 2 GCE_MODEL_QUESTIONS_VOL1 • 2019 • CHEMISTRY • essay
Gce Model Questions Vol1 2019 Chemistry Question 2 diagram

The diagram shows the Lewis structure of the coordination compound [Cu(NH3)4]Cl2. The central copper ion is surrounded by four ammonia (NH3) ligands arranged in a square planar geometry, and two chloride ions act as counter‑ions.

Question Parts

( a )
State the oxidation state of the copper ion in the complex and justify your answer using periodic‑table information.
( b )
Write the electron configuration of the copper ion in the complex, indicating any electron loss and the resulting d‑electron count.
( c )
Explain why the complex adopts a square planar geometry rather than a tetrahedral geometry, referring to crystal‑field theory and the position of copper in the periodic table.
( d )
Predict the colour of the solid compound and give a brief explanation based on d‑d electronic transitions and the ligand‑field splitting you described.

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About This Question

This is Gce Model Questions Vol1 2019 Chemistry Question 2. It is one of the essay questions from the 2019 Gce Model Questions Vol1 Chemistry examination.

The question covers periodic table, transition metals, coordination chemistry .

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