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HomeAQA GCSE ChemistryRequired practical: rates of reaction (including use of colorimeter and gas syringe)
AQA · GCSE · Chemistry

Required practical: rates of reaction (including use of colorimeter and gas syringe)
Practice Questions

15 AQA GCSE Chemistry questions on Required practical: rates of reaction (including use of colorimeter and gas syringe), each with instant feedback and a full examiner-style mark scheme.

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Question 1 · 1 mark · Difficulty 2/3

In the sodium thiosulfate and acid experiment, the rate is judged by timing how long until:

  1. A cross under the flask is no longer visible (the mixture turns cloudy)
  2. The flask changes colour to red
  3. The acid boils
  4. A gas relights a splint
Show answer & explanation
✓ Answer: AA cross under the flask is no longer visible (the mixture turns cloudy)
The reaction forms a cloudy yellow precipitate of sulfur; the time for a marked cross to disappear measures the rate.
Question 2 · 1 mark · Difficulty 2/3

When investigating how concentration affects rate, the concentration is the:

  1. Independent variable
  2. Dependent variable
  3. Control variable
  4. Catalyst
Show answer & explanation
✓ Answer: AIndependent variable
Concentration is deliberately changed (independent variable) to see its effect on the reaction rate.
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AQA GCSE Chemistry: Required practical: rates of reaction (including use of colorimeter and gas syringe) FAQ

How many AQA GCSE Chemistry questions on Required practical: rates of reaction (including use of colorimeter and gas syringe) are there on Kramizo?
Kramizo currently has 15 exam-board-aligned practice questions on Required practical: rates of reaction (including use of colorimeter and gas syringe) for AQA GCSE Chemistry, with new questions added every week. Each question gives you instant feedback and a full examiner-style mark scheme that tells you exactly what would earn marks on a real AQA paper. The questions span the full difficulty range — from straightforward recall (level 1) right up to multi-step reasoning and evaluation (level 3) — so the bank works for first-pass revision and final exam-week stress testing alike.
Is Kramizo free for AQA GCSE students preparing for Chemistry?
Yes — completely free. Every student gets 45 questions a day on the free plan, with no card required and no trial countdown. That free quota works across every subject and every topic in our bank, so you can mix Required practical: rates of reaction (including use of colorimeter and gas syringe) practice with other Chemistry topics or even switch to a totally different AQA subject without paying anything. Kramizo's optional Pro plan removes the daily cap and adds detailed progress analytics, but the free tier is the real product — used by thousands of GCSE, IGCSE and CSEC students.
Are the Required practical: rates of reaction (including use of colorimeter and gas syringe) questions aligned to the official AQA GCSE Chemistry syllabus?
Every question is written against the published AQA GCSE Chemistry specification, including the exact command words (state, describe, explain, calculate, evaluate, etc.), mark allocations, and difficulty tier you'd see on a real AQA paper. Explanations are written in the style of official examiner mark schemes — they tell you what is being awarded marks and why distractors are wrong, not just whether you got it right. The bank is continually refined to match the latest syllabus updates from AQA.
How is Required practical: rates of reaction (including use of colorimeter and gas syringe) typically tested on AQA GCSE Chemistry papers?
Required practical: rates of reaction (including use of colorimeter and gas syringe) appears across multiple question types on real AQA GCSE Chemistry papers — most commonly as multiple-choice questions in the objective section, structured short-answer questions in the main paper, and occasionally as part of an extended response. Kramizo's practice bank reflects that mix: 4-option MCQs, true/false statements, fill-in-the-blank key terms, multi-select questions, and ordering questions. Working through the bank gives you exposure to every question style examiners actually use.

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