Calculating Cell EMF
AQA A-Level Chemistry
3.1.11
This topic explains what cell EMF represents, how to calculate cell EMF using standard electrode potentials, and how electrode potentials can be used to predict oxidation and reduction in electrochemical cells. You’ll also learn how changes in conditions affect electrode potentials and the overall EMF of a cell.
Begin with the Learn section if this is your first time covering the topic. If you are revising, move to Revise. If you are testing yourself, go straight to Practise.
In this topic you will:
- Understand what cell EMF represents in an electrochemical cell.
- Calculate cell EMF using standard electrode potentials.
- Rearrange EMF equations to determine unknown electrode potentials.
- Explain how concentration and pressure affect cell EMF.
Learn
Gain a complete understanding
Learn the core concepts and build a solid understanding.
What to do:
- Watch the video from start to finish.
- Focus on understanding key concepts.
- Take notes using the guided notes.
Revise
Check understanding and build recall
Reinforce your knowledge by testing your recall regularly.
What to do:
- Use the flashcards (Leitner system).
- Do brain dumps to test your recall.
- Watch the video (coming soon) to check and fix gaps.
Practise
Apply knowledge in exam questions
Practise exam style questions and develop exam technique
What to do:
- Attempt the questions first (no notes!).
- Watch the video walkthrough (coming soon).
- Check your answers and learn from any mistakes.
Where does this fit?
This lesson is part of the Electrochemistry topic in Physical Chemistry.