Core practical - Electrolysis (AQA GCSE Chemistry): Flashcards
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Practise the cards
15 cards from this deck
What electrolysis does to ionic compounds
What electrolysis does to ionic compounds
Breaks them down using electrical energy
Why aqueous ionic solutions conduct electricity
Why aqueous ionic solutions conduct electricity
Ions are free to move around in solution
Type of electrodes used in electrolysis
Type of electrodes used in electrolysis
Graphite electrodes
Why graphite electrodes are used
Why graphite electrodes are used
They are inert (don't react) with products
Type of current needed for electrolysis
Type of current needed for electrolysis
Direct current (d.c.)
The cathode in electrolysis
The cathode in electrolysis
The negative electrode
The anode in electrolysis
The anode in electrolysis
The positive electrode
Ions attracted to the cathode
Ions attracted to the cathode
Positive ions
Ions attracted to the anode
Ions attracted to the anode
Negative ions
Product at cathode: copper chloride solution
Product at cathode: copper chloride solution
Red-brown solid (copper)
Product at anode: copper chloride solution
Product at anode: copper chloride solution
Pale green gas (chlorine)
Product at anode: potassium bromide solution
Product at anode: potassium bromide solution
Orange solution (bromine)
Test for chlorine gas
Test for chlorine gas
Damp litmus paper - turns red then bleaches white
Where metal ions go during electrolysis
Where metal ions go during electrolysis
Negative electrode (cathode)
Where non-metal ions go during electrolysis
Where non-metal ions go during electrolysis
Positive electrode (anode)