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ElectroChemistry

Can we use chemical reactions to get electricity and vice versa?

Previously...

You've learnt about the reactivity series as well as redox chemistry. Now let's apply those knowledge to do work!

Let's Explore!

Watch the following video on a galvanic cell and answer the following questions:

 

  • Which metal is more reactive, zinc or copper? Hence, which will be oxidised?

  • What is the anode? What is the cathode?

  • Does oxidation or reduction occur at the anode? The cathode?

  • Why is there a salt bridge? How does it work?

  • How does the electron move? Hence, what is the direction of current?

  • What would be your observations of the set up in real life?

Watch the following video on an electrolytic cell and answer the following questions:

 

  • What are your observations when current is pass through the set-up?

  • Where is the copper deposited at? Anode or Cathode?

  • Hence, what redox reaction has occured at each side?

Summary

Compare and contrast the galvanic and electrolytic cell:

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