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PAG C8: Measuring and Testing Gases

Collect and test gases produced in chemical reactions including hydrogen, oxygen and carbon dioxide

Required PracticalOCRGCSE

🔬 Equipment Required

  • Conical flask or test tube
  • Delivery tube and bung
  • Gas syringe
  • Trough and collection tubes
  • Splint
  • Glowing splint
  • Limewater
  • Chemicals to generate gases
  • Stopwatch

🦺 Safety Precautions

  • Wear safety glasses
  • Hydrogen is flammable - test away from main gas supply
  • Chlorine is toxic - work in fume cupboard
  • Ensure good ventilation
  • Do not inhale gases directly

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About PAG C8: Measuring and Testing Gases

PAG C8: Measuring and Testing Gases is a required practical for OCR GCSE Chemistry. This practical collect and test gases produced in chemical reactions including hydrogen, oxygen and carbon dioxide

Students are expected to understand the method, identify and control variables, use appropriate equipment, analyse results, draw graphs, identify sources of error, suggest improvements, and consider safety precautions.

Questions on required practicals frequently appear in OCR GCSE Chemistry exams and can be worth significant marks. Practice with our AI-generated questions to master this practical.

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