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4.1 Acids

4.1 Acids

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Question 105

During a chemical reaction, the pH of the solution changed from 2 to 5.

By what factor has the concentration of hydrogen ions in the solution changed?

A

×1,000\times 1,000×1,000

B

×3\times 3×3

C

×13\times \frac{1}{3}×31​

D

×11,000\times \frac{1}{1,000}×1,0001​

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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