Electrolysis

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Electrolysis
Electrolysis breaks down ionic substances into
simpler substances by using electricity!
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Ionic substances!

• For you to properly understand electrolysis, you
  need to be aware of the definition of an Ionic
  Substance.
• Ionic substances are formed when a metal reacts
  with a non metal.
• They contain charged particles called ions.
• Ions are free to move in solutions or molten.
  Which is why electrolysis extracts a metal from a
  solution.

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• Ionic compounds can be used in electrolysis to
  produce useful product.
• Ionic solutions can be used to make salts.
• Oxidation-reduction reactions involve the
  transfer of electrons.

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The Electrolysis Process
For electrolysis to take place there needs to
be Two electrodes A positive electrode
(anode), and a negative electrode (Cathode) An
Ionic solution Electricity! So you end up with
something that looks like this
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• At the Positive electrode (Anode), negatively
  charged ions lose electrons. This loss of
  electrons is known as Oxidation.
• At the negative electrode (Cathode), positively
  charged ions gain electrons. This Gain of
  electrons is known as Reduction.
• To help you remember this use the words oil rig.
• Oxidation Is Loss of electrons.
• Reduction Is Gain of electrons.
• If both reduction and oxidation occur in a
  chemical reaction, the reaction is known as a
  Redox reaction.

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Example..

• In the electrolysis of copper chloride solution,
  copper is deposited at the Negative electrode,
  and chlorine gas is given off at the positive
  electrode.
• At the negative electrode
• Cu² 2 e? Cu (s)
• At the positive electrode
• 2Cl ? 2e ? Cl2 (g)
• (g) Means a gas
• (s) Means a solid

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Things to remember

• OIL RIG
• Positive electrode Anode
• Negative electrode Cathode
• Ions are free to move around in a solution
• Electrolysis is the breaking down of a compound.

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Now I quick quiz!

• What is the definition of electrolysis?
• How is an ionic substance formed?
• What happens at the positive electrode (Anode)?
• 4. What happens at the negative electrode
  (Cathode)?
• 5. What does Oil Rig Stand for?

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Answers

1. The breaking down of a compound. Or breaks down
   ionic substances into simpler substances using
   electricity.
2. An ionic substance is formed when a metal reacts
   with a non metal.
3. Reduction occurs positively charged ions gain
   electrons.
4. Oxidation occurs negatively charged ions lose
   electrons.
5. Oxidation Is Loss..Reduction Is Gain