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4.2 Identifying the products of chemical reactions

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Question 6
H

A student has four unlabelled white solids.

The solids are:

  • calcium chloride

  • potassium carbonate

  • potassium sulfate

  • sodium iodide

a.

Describe how the student could use chemical tests to identify all four solids.

Your answer should say how each test is done and give the expected result for each solid.

[6]
b.

Another student adds barium chloride solution to a solution of potassium carbonate and to a solution of potassium sulfate. The student does not add any acid first.

Both solutions give a white precipitate.

Explain why dilute hydrochloric acid must be added before the barium chloride solution in the test for sulfate ions.

[2]
c.

Write the ionic equation, with state symbols, for the reaction that happens when silver nitrate solution is added to sodium iodide solution.

[2]
Markscheme

4.2 Identifying the products of chemical reactions Questions

  1. GCSE
  2. /Chemistry
  3. /4.2 Identifying the products of chemical reactions

52 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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