electrolysis

Question 1

2a

Answer 1

a layer of solid Ag silver would form at the negative electrode
Ag+ + e- -> Ag

Question 2

2b

Answer 2

chlorine gas would fizz
2Cl- ->Cl2 + 2e-

Question 3

2c

Answer 3

reduction,reduction

Question 4

2d

Answer 4

it is aqueous and potassium is more reactive than hydrogen so it produces hydrogen

Question 5

3a

Answer 5

cryolite is added to lower the melting point so the aluminium oxide is molten and its cheaper

Question 6

3b

Answer 6

Al3+ + 3e- -> Al

Question 7

3c

Answer 7

carbon dioxide forms because the ocygn irons are ocidised by the graphite made and forms CO2
C + 202- -> CO2 + 4e-

Question 8

3d

Answer 8

because aluminium is higher than carbon on the reactivity series

Question 9

4a

Answer 9

oxygen

Question 10

4b

Answer 10

4OH- -> 2H20 +02 + 4e-

Question 11

electrolyte molten aluminium chloride
product at anode
product at cathode

Answer 11

chlorine gas
aluminium metal

Question 12

electrolyte potassium nitrate solution
product at anode
product at cathode

Answer 12

oxygen gas
hydrogen gash

Question 13

product at anode - chlroine gas
product at cathode - sodium metal
electrolyte

Answer 13

molten sodium chloride

Question 14

electrolyte sodium chloride solution
product at anode
product at cathode

Answer 14

chlorine gas
hydrogen gas