Electrolysis (AQA GCSE Chemistry): Flashcards
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Practise the cards
15 cards from this deck
What is electrolysis?
What is electrolysis?
Breaking down an ionic compound using electricity
What states allow electrolysis to occur?
What states allow electrolysis to occur?
Molten (melted) or dissolved in water
Why solid ionic compounds can't undergo electrolysis
Why solid ionic compounds can't undergo electrolysis
Ions are stuck in lattice and cannot move freely
What is the cathode?
What is the cathode?
The negative electrode
What is the anode?
What is the anode?
The positive electrode
Which ions move to the cathode?
Which ions move to the cathode?
Positive ions
Which ions move to the anode?
Which ions move to the anode?
Negative ions
Process occurring at the anode
Process occurring at the anode
Oxidation (electrons are lost)
Process occurring at the cathode
Process occurring at the cathode
Reduction (electrons are gained)
What oxidation means in electrolysis
What oxidation means in electrolysis
Loss of electrons
What reduction means in electrolysis
What reduction means in electrolysis
Gain of electrons
OIL RIG mnemonic meaning
OIL RIG mnemonic meaning
Oxidation Is Loss, Reduction Is Gain (of electrons)
Product at cathode in molten electrolysis
Product at cathode in molten electrolysis
Lead metal
Product at anode in molten electrolysis
Product at anode in molten electrolysis
Bromine gas
Why graphite is used for electrodes
Why graphite is used for electrodes
Conducts electricity well and doesn't react with chemicals