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Edexcel A-level Chemistry Flame Tests

Flame Tests

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Flame tests are used to detect and identify ions in samples. Instrumental methods of analysis using flame emission spectroscopy are faster, and more accurate and sensitive than simple flame tests.

Flame emission spectroscopy

The flame test allows us to identify metal ions as the flame will show a certain colour for a certain metal ion.

Ions flame tests

We can use flame tests and solutions to analyse a range of ionic compounds.

Identifying compounds

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Fill in the gap: Flame tests are used to identify the presence of .... ions in a compound.

Edexcel A-level Chemistry Flame Tests Fill in the gap: Flame tests are used to identify the presence of .... ions in a compound.
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2

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A flame test conducted gives the flame shown in the diagram. What metal ion is present?

Edexcel A-level Chemistry Flame Tests A flame test conducted gives the flame shown in the diagram. What metal ion is present?
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3

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A salt solution is tested. The flame test gives a yellow flame and the addition of HCl and barium chloride solution gives a white precipitate. What is the salt?

Edexcel A-level Chemistry Flame Tests A salt solution is tested. The flame test gives a yellow flame and the addition of HCl and barium chloride solution gives a white precipitate. What is the salt?
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4

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We have 4 samples. We carry out a flame test and it gives a lilac colour. We then add dilute nitric acid and silver nitrate and it gives a yellow precipitate. Which sample is it we have tested?

Edexcel A-level Chemistry Flame Tests We have 4 samples. We carry out a flame test and it gives a lilac colour. We then add dilute nitric acid and silver nitrate and it gives a yellow precipitate. Which sample is it we have tested?
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5

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Why can we get different results on testing with iron based compounds or solutions?

Edexcel A-level Chemistry Flame Tests Why can we get different results on testing with iron based compounds or solutions?
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