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4.2 Identifying the products of chemical reactions

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Question 28

A ceramics manufacturer dissolves samples of four glaze ingredients and analyses the solutions using flame emission spectroscopy.

The tables show reference wavelengths for four metal ions and the wavelengths recorded for the ingredients.

Metal ionReference wavelengths (nm)
Lithium610.4, 670.8
Sodium589.0, 589.6
Calcium422.7, 616.2, 643.9
Copper(II)510.5, 515.3, 521.8
IngredientWavelengths recorded (nm)
Ingredient J610.4, 670.8
Ingredient K510.5, 515.3, 521.8
Ingredient L422.7, 616.2, 643.9
Ingredient M589.0, 589.6

Which ingredient contains copper(II) ions?

[1]
A

Ingredient K

B

Ingredient J

C

Ingredient M

D

Ingredient L

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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