Electrolysis (AQA GCSE Chemistry Combined Science): Flashcards
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13 cards from this deck
What is electrolysis?
What is electrolysis?
Breaking down ionic compounds using electricity
Conditions needed for electrolysis
Conditions needed for electrolysis
Ionic compound must be molten or dissolved
Why solid ionic compounds don't conduct electricity
Why solid ionic compounds don't conduct electricity
Ions stuck in lattice and cannot move
What is the anode?
What is the anode?
The positive electrode
What is the cathode?
What is the cathode?
The negative 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
What process happens at the anode?
What process happens at the anode?
Negative ions lose electrons (oxidation)
What process happens at the cathode?
What process happens at the cathode?
Positive ions gain electrons (reduction)
What is oxidation in electrolysis?
What is oxidation in electrolysis?
Loss of electrons
What is reduction in electrolysis?
What is reduction in electrolysis?
Gain of electrons
What does OIL RIG stand for?
What does OIL RIG stand for?
Oxidation Is Loss, Reduction Is Gain (of electrons)
Why use graphite electrodes?
Why use graphite electrodes?
Conducts electricity, doesn't react, inert