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4.1 Acids

4.1 Acids

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Question 62

Industrial waste gas containing sulfur dioxide is bubbled through water to form an acidic solution, Solution W.

A technician slowly adds Solution W to a flask containing a solution of sodium hydroxide with a pH of 14.

During this process:

  • the pH of the mixture changes
  • the temperature of the mixture increases.

Explain how and why the pH changes, and explain why the temperature increases.

[3]
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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