Electrolysis

Question 1

What happens at the cathode?

Answer 1

> the positive cations are attracted where they gain electrons to become atoms.(reduction)

Question 2

What happens to the electrons at the anode?

Answer 2

They flow off into the circuit

Question 3

What is reduction?

Answer 3

The gaining of electrons to produce atoms

Question 4

What is oxidation?

Answer 4

The loss of electrons to form atoms

Question 5

What are the products of the electrolysis of NaCl solution?

Answer 5

Hydrogen

Sodium hydroxide

Chlorine

Question 6

What happens at the anode for the electrolysis of NaCl solution?

Answer 6

2 chloride ions lose an electron and become one chlorine molecule

• oxidation.

The chlorine leaves the process as a gas.

Question 7

What happens at the cathode (-ve) for the electrolysis of NaCl solution?

Answer 7

Two H+ ions gain an electron to become a hydrogen molecule

Question 8

What happens at the anode?

Answer 8

> negative ions (anions) are attracted, where they lose electrons to become atoms. (Oxidation)