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8.3 Identification of ions by chemical and spectroscopic means

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Question 7

A food laboratory tests a seaweed extract for iodide ions. Dilute nitric acid and then silver nitrate solution are added to a sample of the extract.

Which observation shows that iodide ions are present?

[1]
A

A cream precipitate

B

No precipitate

C

A yellow precipitate

D

A white precipitate

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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