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4.2 Identifying the products of chemical reactions

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Question 17

A geologist tests a pure solid sample labelled S. When dilute acid is added to S, a gas is released. The gas is passed through limewater, which turns milky.

a.

Identify the gas released.

[1]
b.

Identify the negative ion in solid S.

[1]
Markscheme

4.2 Identifying the products of chemical reactions Questions

  1. GCSE
  2. /Chemistry
  3. /4.2 Identifying the products of chemical reactions

107 exam-style questions on OCR GCSE Chemistry 4.2 Identifying the products of chemical reactions, covering 4.2.1 Tests to identify gases, 4.2.2 Tests for aqueous ions and flame tests, and 4.2.3 Instrumental methods of analysis. Each one has a worked solution and a mark scheme showing where the marks go.

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