5.5 ELECTROLYSIS

Question 1

Define electrolysis

Answer 1

The breaking down of a compound using electricity

Question 1

Define electrolysis

Answer 1

The breaking down of a compound using electricity

Question 2

What properties must electrodes have

Answer 2

Inert and a soild that conducts electricity

Question 3

What properties must electrodes have

Answer 3

Inert and a soild that conducts electricity

Question 4

What are common electrodes

Answer 4

Graphite (cheap) or platinum (expensive)

Question 5

What is the positive electrode

Answer 5

Anode

Question 6

What is the negative electrode

Answer 6

Cathode

Question 7

What is an electrolyte

Answer 7

The substance that is being broken down

Question 8

What is attracted to the cathode

Answer 8

Cations

Question 9

What is attracted to the anode

Answer 9

Anions

Question 10

How does electrolysis happen in molten solutions

Answer 10

The anions move to the anode, and cations to the cathode

Question 11

What elements is made at the anode of aqueous electrolysis

Answer 11

• The halide ion
• Oxygen + 2Water +4e- (from 4OH-)

Question 12

What elements are made at the cathode of aqueous electrolysis

Answer 12

• Metal that is less reactive than hydrogen
• Hydrogen gas