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8.3 Identification of ions by chemical and spectroscopic means

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Question 2

A technician tests a solution of aluminium sulfate. Sodium hydroxide solution is added to one portion of the solution until the sodium hydroxide is in excess. Dilute hydrochloric acid and then barium chloride solution are added to a second portion.

Which observations would the technician record?

[1]
A

White precipitate that dissolves in excess sodium hydroxide; white precipitate with barium chloride

B

White precipitate that stays in excess sodium hydroxide; no precipitate with barium chloride

C

White precipitate that dissolves in excess sodium hydroxide; no precipitate with barium chloride

D

White precipitate that stays in excess sodium hydroxide; white precipitate with barium chloride

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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