Electrolysis

Question 1

What is electrolysis

Answer 1

The breakdown of a substance into simpler ones using electricity

Question 2

What are positive ions called

Answer 2

Cations

Question 3

What are negative ions called

Answer 3

Anions

Question 4

What are electrodes made out of

Answer 4

Graphite as the graphite is unreactive so the electrodes are inert

Question 5

What is the electrolyte

Answer 5

a substance that contains free-moving ions and can conduct electricity, which is broken down by an electric current

Question 6

What is oxidation and reduction in the context of electrons

Answer 6

Oxidisation
Is
Loss
Reduction
Is
Gain
(Of electrons)

Question 7

What happens at the cathode

Answer 7

Reduction

Question 8

What happens at the anode

Answer 8

Oxidisation

Question 9

What charge is the cathode and anode

Answer 9

Anode+ cathode-

Question 10

How do hydrogen fuel cells work

Answer 10

Hydrogen fuel cells contain H and O2 that have been separated by electrolysis, when they recombine it produces a potential difference, the bigger the difference in the reactivity the bigger the voltage generated

Question 11

Equation at the anode of the hydrogen fuel cells

Answer 11

2H2 —> 4H+ + 4e-

Question 12

Equation at the cathode of a hydrogen fuel cells

Answer 12

O2 + 4H+ +4e- —> 2H2O