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4.2 Identifying the products of chemical reactions

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Question 4

A quality-control chemist tests a powdered raw material that may contain sodium ions, copper(II) ions or both.

The flame test produces a yellow-orange flame, with no green colour.

Which conclusion is supported by this result?

[1]
A

Sodium ions are present, and copper(II) ions are absent.

B

Sodium ions are present, but the result for copper(II) ions is inconclusive.

C

Both sodium ions and copper(II) ions are present.

D

Copper(II) ions are present, but the result for sodium ions is inconclusive.

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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