Formation of Coloured Ions (AQA A-Level Chemistry): Quizzes

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Formation of Coloured Ions
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What happens to the five 3d3d orbitals when ligands bond to a transition metal ion?

They split into two groups

Which equation relates energy absorbed to wavelength of light?

ΔE=hcλ\Delta E = \frac{hc}{\lambda}

How do higher oxidation states affect the energy difference between dd-orbitals?

Increase the energy difference

Which ligand causes a larger energy gap in dd-orbital splitting?

CN−CN^- (strong-field)

When does a transition metal compound appear colourless?

No 3d3d electrons or full 3d3d sub-level

What happens to light wavelengths that are NOT absorbed by a transition metal ion?

They are reflected

How does solution concentration affect light absorption?

More concentrated absorbs more light

What relationship does Beer's Law describe for a calibration graph?

Absorbance proportional to concentration

Which filter colour is used for copper(II) ion solutions in colourimetry?

Blue

What is used to zero/calibrate a colourimeter before measuring samples?

Distilled water

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