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4.1 Acids

4.1 Acids

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Question 13

An analytical chemist monitors a fermentation process. During the active phase, the pH of the growth medium drops from 6.45 to 5.75.

Which of the following correctly describes the change in the concentration of hydrogen ions, $[H+][\text{H}^+]$ , in the growth medium?

A

Increased by a factor of approximately $1.12$

B

Decreased by a factor of approximately $5.0$

C

Increased by a factor of approximately $5.0$

D

Increased by a factor of approximately $0.70$

Markscheme

4.1 Acids Questions

GCSE
Chemistry
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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