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8.3 Identification of ions by chemical and spectroscopic means

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Question 29

A laboratory technician tests solution P using a nichrome wire. The wire was last used to test a sodium compound.

TestPreparation of the wireFlame colour after the wire is dipped into solution P
1The wire is not cleanedYellow
2The wire is cleaned with dilute hydrochloric acid and heated until no colour is seenCrimson red

Explain what the results show about the metal ion in solution P and why the flame colour changed between the two tests.

[3]
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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