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4.2 Identifying the products of chemical reactions

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Question 27

During an investigation of contamination, a chemist isolates a pure crystalline compound, P. The chemist dissolves samples of P in water and obtains these results.

TestResult
Flame testOrange-red flame
Add dilute nitric acid, then silver nitrate solution, to a separate portionCream precipitate
a.

Explain what the two results show about the ions in P.

[2]
b.

Give the formula of P.

[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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