Electrolysis
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1
what do half equations show
electrons being gained or lost
2
what happens in electrolysis
an electric current is passed through an electrolyte and the ions move towards the electrodes where they react and the compound decomposes
3
positive ions are attracted to the
cathode
4
when positive ions reach the cathode what happens
gain electrons
5
when electrons are gained this is called
reduction
6
when electrons are lost this is called
oxidation
7
negative ions are attracted to the
anode
8
what happens when negative ions reach the anode
lose electrons
9
is cathode positive or negative electrode
negative
10
is anode positive or negative electrode
positive
11
what do the ions create when they reach the electrolyte
flow of charge
12
what happens as the ions gain or lose electrons
form an uncharged element and are discharged from the electrolyte
13
why can’t an ionic solid be electrolysed
the ions are in fixed positions and cant move
14
why can a molten ionic compound be electrolysed
ions can move freely and conduct electricity
15
what happens if a metal is too reactive to be reduced by carbon or would react with carbon what technique is used to extract it
electrolysis
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