Welcome to the Quiz!
This quiz contains 13 questions from a mix of 1 subtopics.
When electrons move from one d orbital to another of a higher energy level, what happens?
they do not interact with light
they absorb energy in the visible region of the spectrum
they reflect all colors of light
they emit energy in the visible region of the spectrum
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What is the colour of the complex ion [Co(CN)6]3- which absorbs blue light?
blue
yellow
red
green
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What is the correct formula that relates the energy difference (ΔE) to wavelength (λ)?
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What is the complementary colour seen when mangantate(VII) ions absorb green light from the visible spectrum?
red
orange
purple
green
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List four factors that can affect the exact energy difference (ΔE) between the ground and excited state of a transition metal complex.
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What happens to the energy of the 3d orbitals when ligands bond to transition metal ions?
they all decrease in energy equally
they all increase in energy equally
they split into two energy levels
they remain unchanged
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In octahedral complexes such as [Cu(H2O)6]2+, how many d-orbitals have a lower energy?
4
2
1
3
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When white light hits a complex ion, what happens to the wavelengths of light that are not absorbed?
they change their wavelength
they are absorbed by the ligands
they are converted into heat energy
they are reflected or transmitted
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In the electromagnetic spectrum, which colour of light has the longest wavelength?
blue
violet
red
green
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Explain the process of using colorimetry to determine the concentration of an unknown coloured transition metal solution.
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What is plotted on a calibration curve in colorimetry?
concentration vs. mass
concentration vs. absorbance
concentration vs. colour
concentration vs. volume
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In colorimetry, how is the concentration of an unknown sample determined?
by measuring its mass
by measuring its volume
by comparing its absorption to a calibration curve
by comparing its color to the standard solutions
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What technique uses light absorption to quantify the concentration of coloured transition metal solutions?
chromatography
electrophoresis
titration
colorimetry
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