Ligand Exchange (AQA A-Level Chemistry): Quizzes

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Ligand Exchange
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Which properties can ligand exchange alter in a complex ion?

Colour, coordination number, geometry

What is true about H2O\text{H}_2\text{O} and NH3\text{NH}_3 as ligands?

Uncharged and similar in size

Why does Cl−\text{Cl}^- often change coordination number when replacing H2O\text{H}_2\text{O}?

Cl−\text{Cl}^- is larger than H2O\text{H}_2\text{O}

How many donor atoms do bidentate ligands bind through?

Two donor atoms

How many donor atoms does EDTA4−\text{EDTA}^{4-} coordinate through?

Six donor atoms

Why is carbon monoxide toxic to humans?

Binds more strongly than O2\text{O}_2 to Fe(II)

Why does entropy increase in the chelate effect?

Reaction releases free ligands

What colour is [Cu(NH3)4(H2O)2]2+[\text{Cu}(\text{NH}_3)_4(\text{H}_2\text{O})_2]^{2+}?

Deep royal blue

What is the colour of [Co(H2O)6]2+[\text{Co}(\text{H}_2\text{O})_6]^{2+}?

Pink

What is the coordination number of [CoCl4]2−[\text{CoCl}_4]^{2-}?

4

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