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PAG 5: Electrochemical Cells

Construct electrochemical cells and measure electrode potentials

Required PracticalOCRA-Level

🔬 Equipment Required

  • Metal electrodes (Zn, Cu, Fe, Mg, Ag)
  • Metal salt solutions (1.0 mol dm⁻³)
  • Beakers
  • Salt bridge (KNO₃ soaked filter paper)
  • High resistance voltmeter
  • Connecting wires with crocodile clips
  • Sandpaper (to clean electrodes)

🦺 Safety Precautions

  • Wear safety glasses
  • Some metal salts are toxic (copper, lead)
  • Silver nitrate stains skin
  • Clean electrodes before use
  • Dispose of solutions appropriately

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About PAG 5: Electrochemical Cells

PAG 5: Electrochemical Cells is a required practical for OCR A-Level Chemistry. This practical construct electrochemical cells and measure electrode potentials

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 A-Level Chemistry exams and can be worth significant marks. Practice with our AI-generated questions to master this practical.

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