Electrolytic Processes - Paper 1

Question 1

Define electrolyte

Answer 1

Electrolytes are ionic compounds in the molten state or dissolved in water.

Question 2

Define electrolysis

Answer 2

Electrolysis is a process in which electrical energy, from a direct current supply, decomposes electrolytes.

Question 3

Explain the movement of ions during electrolysis.

Answer 3

Positively charged cations migrate to the negatively charged cathode.
Negatively charged anions migrate to the positively charged anode.

Question 4

What is produced at the cathode in the electrolysis of a dissolved ionic compound?

Answer 4

The metal is produced at the cathode if it is less reactive than hydrogen, otherwise hydrogen is produced.

Question 5

What is produced at the anode in the electrolysis of a dissolved ionic compound?

Answer 5

If halide ions are present, the metal halogen is produced, otherwise oxygen is produced.

Question 6

Define oxidation

in terms of electrons

Answer 6

Oxidation is the loss of electrons.

Question 7

Define reduction

in terms of electrons

Answer 7

Reduction is the gain of electrons.