AQA · Chemistry · 8462
GCSE Chemistry: Flame emission spectroscopy
Chemical analysis · AQA GCSE Chemistry (8462), specification point 4.8.3.7. Cards are generated from the exam board's own specification for "Flame emission spectroscopy", and every card links back to the page it came from. Separate science only. Specification © AQA — used with attribution.
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What is flame emission spectroscopy used to analyse?
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Metal ions in solutions.
Is flame emission spectroscopy a chemical or an instrumental method of analysis?
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An instrumental method.
In flame emission spectroscopy, what happens to the sample first?
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It is put into a flame, which makes it give out light.
In flame emission spectroscopy, what instrument is the emitted light passed through?
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A spectroscope.
The output of flame emission spectroscopy is a ? spectrum.
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line
What two things can a flame emission line spectrum tell you about the metal ions in a solution?
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Their identity and their concentration.
How does a line spectrum identify which metal ion is present?
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Each metal ion produces its own characteristic pattern of lines, which is matched against a reference spectrum.
What is needed alongside a flame emission result to identify an unknown metal ion?
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A reference set of spectra for known metal ions, in the same chart or tabular form.
Give one advantage of flame emission spectroscopy over a simple flame test.
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It can measure the concentration of the metal ions (and can identify ions in mixtures), not just detect their presence.
Why is the Earth's atmosphere described as dynamic?
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It is forever changing, due to both man-made causes and natural cycles.
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