Electrolysis of solutions (AQA GCSE Chemistry Combined Science): Flashcards
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13 cards from this deck
What is electrolysis?
What is electrolysis?
Using electricity to break down a solution
Common gases in electrolysis of solutions
Common gases in electrolysis of solutions
Hydrogen and oxygen
Two ions formed when water molecules break apart
Two ions formed when water molecules break apart
(hydrogen ions) and (hydroxide ions)
Which ions does the cathode attract?
Which ions does the cathode attract?
Positive ions
Which ions does the anode attract?
Which ions does the anode attract?
Negative ions
Cathode product if metal more reactive than hydrogen
Cathode product if metal more reactive than hydrogen
Hydrogen gas
Cathode product if metal less reactive than hydrogen
Cathode product if metal less reactive than hydrogen
The metal
What determines the cathode product in electrolysis?
What determines the cathode product in electrolysis?
The reactivity series
Anode product when no halide ions present
Anode product when no halide ions present
Oxygen gas
Anode product when halide ions present
Anode product when halide ions present
Halogen gas
What halide ions are formed from
What halide ions are formed from
Group 7 elements
Product at anode in NaCl solution electrolysis
Product at anode in NaCl solution electrolysis
Chlorine gas
Product at cathode in NaCl solution electrolysis
Product at cathode in NaCl solution electrolysis
Hydrogen gas