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4.1 Acids

4.1 Acids

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Question 3

A student uses the following method to prepare a specimen of the insoluble salt, silver chloride (AgClAgClAgCl):

  • Pour 50 cm3 of silver nitrate solution into a beaker.
  • Add a few drops of sodium chloride solution until a white precipitate is observed.
  • Allow the precipitate to settle to the bottom of the beaker.
  • Pour off the liquid from the top.
  • Use a spatula to transfer the wet solid silver chloride onto a watch glass.

Explain two improvements that should be made to this method to increase both the amount (yield) and the purity of the silver chloride obtained.

[4]
Markscheme

4.1 Acids Questions

  1. GCSE
  2. /Chemistry
  3. /4.1 Acids

276 exam-style questions on Edexcel GCSE Chemistry 4.1 Acids, covering 4.1.1 Acids, alkalis and the pH scale, 4.1.2 Hydrogen ion concentration and pH, 4.1.3 Dilute and concentrated, weak and strong acids, 4.1.4 Bases, alkalis and the reactions of acids, 4.1.5 Chemical tests for hydrogen and carbon dioxide, 4.1.6 Neutralisation as a reaction of acids with bases, 4.1.7 Preparing soluble salts, and 4.1.8 Solubility rules and preparing insoluble salts. Each one has a worked solution and a mark scheme showing where the marks go.

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