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Electrode potentials
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From half-equations to a working cell

From half-equations to a working cell

Labelled zinc-copper electrochemical cell showing zinc anode on the left, copper cathode on the right, salt bridge, voltmeter, and electron flow from zinc to copper

A redox reaction involves electron transfer. In a zinc-copper cell, zinc is oxidised and copper(II) ions are reduced, so electrons flow through the wire from zinc to copper.

Electrode potentials Lesson

  1. A Level
  2. /Chemistry
  3. /Electrode potentials

Step-by-step lessons covering Edexcel A Level Chemistry Electrode potentials for A Level Chemistry. Each lesson works through exam-style questions in Paper 1, Paper 2 and Paper 3 format. Build confidence with atomic structure, bonding and moles calculations early on, since these underpin the more demanding organic mechanisms, equilibrium and practical-analysis topics that dominate Year 2.