AQA GCSE Chemistry contents

Unit 6 · The Rate & Extent of Chemical Change

Required Practical 5: Rates of Reaction

3 min read · part of the full Exam Guide

What you are finding out

  • How concentration affects the rate of a reaction, using two methods: measuring the volume of gas produced, and timing a change in colour or turbidity (cloudiness). Start with a hypothesis: "increasing the concentration will increase the rate, because collisions become more frequent"

Full Exam Guide

The rest of this topic is in the full Exam Guide

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In the full topic

  • What you are finding out
  • Method 1: gas volume (magnesium and hydrochloric acid)
  • Method 2: turbidity (sodium thiosulfate and hydrochloric acid)
  • What goes wrong
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