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8.3 Identification of ions by chemical and spectroscopic means

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Question 12

A technician checks an unlabelled metal salt. The salt contains only one type of metal ion.

TestObservation
Flame test on the saltOrange-red flame
Sodium hydroxide solution added to a solution of the saltWhite precipitate

A student states, “One hydroxide ion reacts with each metal ion, so the precipitate has the formula MOH\text{MOH}MOH.”

Explain why the student's statement does not apply to this salt. Give the ionic equation for the formation of the precipitate.

[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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