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4.2 Identifying the products of chemical reactions

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Question 10

A manufacturer uses flame emission spectroscopy to analyse a used cleaning solution. The reference data and the results for the cleaning solution were obtained under the same conditions.

SubstanceWavelengths of lines (nm)
Calcium ions393, 397, 423
Potassium ions404, 766
Sodium ions589
Copper(II) ions511, 515, 522
Used cleaning solution393, 397, 404, 423, 511, 515, 522, 700

Explain which metal ions in the reference data can be identified in the used cleaning solution and whether all the lines have been identified.

[5]
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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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