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8.3 Identification of ions by chemical and spectroscopic means

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Question 7
F

Before a flame test, the wire loop is dipped in dilute hydrochloric acid and heated. Why?

[1]
A

To make the wire heat up more quickly

B

To help the compound stick to the wire

C

To remove ions left from earlier tests

D

To stop the wire melting in the flame

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

40 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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