Chemistry C2

OILRIG!

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  • Created by: alex
  • Created on: 06-12-09 23:18

Electroloysis

  • Electrolysis is the passage of electricity to cause a chemical reaction
  • Only IONIC SUBSTANCES can undergo electrolysis
  • Ionic susbstances must be either MOLTEN or DISSOLVED IN AQUEOUS SOLUTION for electrolysis to occur
  • Positive ions (cations) - are attracted to the negative electrode (cathode) where they GAIN electrons
  • Negative ions (anions) - are attracted to the positive electrode (anode) where they LOOSE electrons
  • Oxidation is loss OIL
  • Reduction is gain RIG

e.g - Electrolysis of sodium chloride to give hydrogen, chlorine and sodium hydroxide

- Electrolysis of aluminium oxide to give aluminium and oxygen

- Purification of copper by making the impure copper the anode and collecting pure copper in the cathode.




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Comments

I P B

Hey, these are very good and detailed notes on electrolysis. Just one error in the "AQUES SOUTION" spelling which should be "AQUEOUS SOLUTION". But apart from that the notes are really good and very useful. So thankyou very much!

alex

thank you.... i will change that straight away :)

Tania

OMG OMG thanks alot this is gonna help me like mad!!!!!

thankyou!!!! XD

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