T6 YR11 - Electrolysis

Question 1

What do positive and negative ions move to?

Answer 1

Positive - cathode
Negative - anode

Question 2

What is the ruling for oxidation and reduction?

Answer 2

OILRIG

Question 3

Define electrolysis?

Answer 3

Process by which electrical current is used to decompose ionic substances into simpler substances

Question 4

What does inert mean?

Answer 4

Not reactive, used in electrodes

Question 5

What is the half equation at the cathode for molten bromide ii?

Answer 5

Pb2+ + 2e- gos to Pb

Question 6

What is the half equation MUST LEARN for dilute aqueous copper chloride at the anode?

Answer 6

4OH- gos to 02 + 2H20 + 4e-

Question 7

What is concentrated brine used in?

Answer 7

Industry

Question 8

What is an indicator to the halogen being discharged?

Answer 8

“Concentrated”

Question 9

What is hydrogen gas used to make?

Answer 9

Fuel

Question 10

What is NAOH used to make?

Answer 10

Soap

Question 11

What is cryolite and what is used for an in?

Answer 11

It lower melting point of aluminium oxide to conserve energy given aluminium oxide has a high mpt

Question 12

What is the half equation at the anode in molten aluminium oxide?

Answer 12

202- gos to 02 + 4e-

Question 13

What happens to the anode in molten aluminium oxide reaction and why?

Answer 13

It breaks down because carbon graphite that the electrode is made out of reacts with oxygen and produces carbon dioxide ,ensign the anode has to be frequently replaced