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8.3 Identification of ions by chemical and spectroscopic means

8.3 Identification of ions by chemical and spectroscopic means

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Question 17

A student is investigating a green mineral sample, which consists mainly of copper(II) carbonate.

a.

How could the student test the mineral sample to show the presence of carbonate ions?

Complete the sentences by choosing the correct substance from the box below.

[ barium chloride, hydrochloric acid, limewater, sodium hydroxide, universal indicator ]

  • The substance added to the mineral sample is __________________
  • The gas produced is identified using __________________
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b.

When heated, copper(II) carbonate undergoes thermal decomposition:

copper(II) carbonate→copper(II) oxide+carbon dioxide \text{copper(II) carbonate} \rightarrow \text{copper(II) oxide} + \text{carbon dioxide} copper(II) carbonate→copper(II) oxide+carbon dioxide

To heat the sample, the student uses a Bunsen burner that burns propane gas (C3H8\text{C}_3\text{H}_8C3​H8​).

Give two ways in which carbon dioxide, a greenhouse gas, is released during this procedure.

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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

29 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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