Electrolysis (OCR GCSE Chemistry A, Combined (Gateway Science Suite)): Flashcards
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Electrolysis can be carried out on which compounds?
Electrolysis can be carried out on which compounds?
Molten ionic compounds
State of ions when ionic compound is melted
State of ions when ionic compound is melted
Free to move
Purpose of electrolysis of molten compounds
Purpose of electrolysis of molten compounds
Extract pure elements from ores
What ionic compounds are made of
What ionic compounds are made of
Positive and negative ions
State of ions in solid ionic compounds
State of ions in solid ionic compounds
Fixed in place, cannot move
Why molten ionic compounds allow electrolysis
Why molten ionic compounds allow electrolysis
Ions are free to move
Temperature needed to melt ionic compounds for electrolysis
Temperature needed to melt ionic compounds for electrolysis
High temperature
What happens to positive metal ions at the cathode?
What happens to positive metal ions at the cathode?
Reduced
What forms at the cathode in molten electrolysis?
What forms at the cathode in molten electrolysis?
Pure metals
What happens to negative non-metal ions at the anode?
What happens to negative non-metal ions at the anode?
Oxidised
What forms at the anode in molten electrolysis?
What forms at the anode in molten electrolysis?
Gases or non-metallic elements
Why molten ionic compounds conduct electricity
Why molten ionic compounds conduct electricity
Ions are mobile