Waec Model Questions Vol1 2020 Chemistry Question 2

Practice essay / theory question 2 from the 2020 Waec Model Questions Vol1 Chemistry examination. This question covers periodic table, transition metals, coordination chemistry, colour of complexes .

Waec Model Questions Vol1 2020 Chemistry Essay / Theory
Topics: periodic table transition metals coordination chemistry colour of complexes
Question 2 WAEC_MODEL_QUESTIONS_VOL1 • 2020 • CHEMISTRY • essay
Waec Model Questions Vol1 2020 Chemistry Question 2 diagram

The diagram shows the structure of a coordination complex formed by a transition‑metal ion with four identical ligands arranged in a square planar geometry.

Question Parts

( a )
Identify the central metal ion, giving its atomic number and its position (group and period) in the periodic table.
( b )
Determine the oxidation state of the metal ion in the complex.
( c )
State the coordination number and the geometry of the complex, and explain how the geometry is consistent with the electron configuration of the metal ion.
( d )
The complex exhibits a deep blue colour. Explain the origin of this colour in terms of electronic transitions, and discuss why such a colour is typical for complexes of metals from this part of the periodic table.

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About This Question

This is Waec Model Questions Vol1 2020 Chemistry Question 2. It is one of the essay questions from the 2020 Waec Model Questions Vol1 Chemistry examination.

The question covers periodic table, transition metals, coordination chemistry, colour of complexes .

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