sc10

Question 1

What are electrolytes?

Answer 1

ionic compounds in a molten state or dissolved in water

Question 2

What is electrolysis?

Answer 2

A process in which electrical energy from a direct current supply decomposes electrolytes

Question 3

Where do cations go to in electrolysis?

Answer 3

The NEGATIVELY charged cathode

Question 4

Where do anions go in electrolysis?

Answer 4

To the POSITIVELY charged anode

Question 5

What is oxidation (in terms of electrons)?

Answer 5

the LOSS of electrons

Question 6

What is reduction (in terms of electrons)?

Answer 6

The GAIN of electrons

Question 7

Does oxidation or reduction happen at the anode?

Answer 7

Oxidation

Question 8

Does oxidation or reaction happen at the cathode?

Answer 8

Reduction

Question 9

In the core practical of electrolysis, what happens to the mass of the anode and why?

Answer 9

It decreases because at the anode, copper gets oxidised

Question 10

What happens to the mass of the cathode in the core practical of electrolysis and why?

Answer 10

It increases because positive copper ions are attracted to it