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8.3 Identification of ions by chemical and spectroscopic means

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Question 31

A solution contains sodium ions and one other metal ion. In a flame test, the solution gives a yellow flame. The solution is then analysed by flame emission spectroscopy. The table shows the wavelengths of the lines in the line spectra of the solution and of two reference solutions.

SolutionWavelengths of lines in nm
Sodium reference589.0, 589.6
Copper reference510.6, 515.3
Sample510.6, 515.3, 589.0, 589.6
a.

Name the other metal ion in the solution.

[1]
b.

Explain why the flame appears yellow and why the other metal ion can still be identified using flame emission spectroscopy.

[2]
Markscheme

8.3 Identification of ions by chemical and spectroscopic means Questions

  1. GCSE
  2. /Chemistry
  3. /8.3 Identification of ions by chemical and spectroscopic means

93 exam-style questions on AQA GCSE Chemistry 8.3 Identification of ions by chemical and spectroscopic means, covering 8.3.1 Flame tests, 8.3.2 Metal hydroxides, 8.3.3 Carbonates, 8.3.4 Halides, 8.3.5 Sulfates, 8.3.6 Instrumental methods, and 8.3.7 Flame emission spectroscopy. Each one has a worked solution and a mark scheme showing where the marks go.

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