Learning objective

Outline practical approaches to measure the rate of a reaction, such as monitoring changes in mass or gas production.

Read the explanation, check the common trap, then practise with flashcards and questions.

Exam focus

Cambridge IGCSE ChemistryChemical reactionsCore contentPractical objective

Study support

Understand this objective

Quick explanation

This point belongs to Rate of reaction, especially Rate of reaction outcomes.
You need to be able to outline practical approaches to measure the rate of a reaction, such as monitoring changes in mass or gas production.
The key ideas to know are Describe, List, and Outline.
Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

DescribeListOutline

Why it matters

This objective helps connect Rate of reaction outcomes to exam-style questions, flashcards, and revision notes for Rate of reaction.

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Flashcards10 linked cards

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Practice Questions7 linked questions

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Paper 6Alternative to PracticalPractical1 marks

Method

In this experiment, hydrochloric acid is added to sodium thiosulfate solution. The time taken for the solution to turn cloudy is recorded.

Time (s)	Concentration of Sodium Thiosulfate (mol/dm³)
10	0.1
20	0.2
30	0.3
40	0.4

a
State the independent variable in this experiment.
Your answer
Aim for approximately 1 distinct marking point.
[1]

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