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8.3 Identification of ions by chemical and spectroscopic means

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Question 23

A technician is analysing two metal salt solutions. Sample P is known to contain copper(II) ions. The technician uses a dropping pipette to transfer sample P. Without rinsing the pipette, the technician uses it to transfer sample Q into a clean test tube. Sodium hydroxide solution is then added to sample Q.

Explain how using the pipette in this way could lead to an incorrect identification of the metal ion in sample Q.

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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

93 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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