Science Revision- unit 3 theme 2 making and improving products

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  • Created by: 10sayere
  • Created on: 29-11-13 16:59

electrolysis

electrolysis is the breakdown of a compound by electricty

electrolysis involves an electrical current passing through a liquid contains freely mooving ions

positive cations are attracted to the negative cathode

negative anions are attracted to the possitive anode

(http://www.ustudy.in/sites/default/files/Electroplating-of-silver.PNG)

electroplating

electrolysis can be used to plate metals with other metals this is called electroplating

a cathode is plated with metal from the anode( the spoon gets coverd with another metal)

why do we electroplate items

protecting from corrosion (rusting)- chronium is used to coat cars and motorbikes

reduce the effects of allergies-lots of people are allergic to a cheap metal called nickel coating the nickel

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