Electrolysis Experperiment 1 (Sodium Sulfate Solution)

Question 0

What is forming at the anode?

Answer 0

Hydrogen ions and oxygen

Question 1

Explain how the experiment is carried out

Answer 1

Sodium sulphate and distilled water are mixed in a Petri dish. Inert electrodes are placed in opposite ends of the solution and universal indicator is added making the solution green.

Question 2

Hydrogen ions make the solution acidic or basic at the anode?

Answer 2

Acidic

Question 3

If the solution is acidic at the anode what colour will be formed in the universal indicator?

Answer 3

Red

Question 4

Give the chemical equation of what happens at the anode

Answer 4

+ _

2H2O -> O2 + 4H + 4e

Question 5

What is formed at the cathode?

Answer 5

Hydroxyl ions. Hydrogen gas is also produced.

Question 6

What does hydroxyl ions do to the solution?

Answer 6

Turns it alkaine

Question 7

Are hydroxyl ions acidic or basic?

Answer 7

Basic

Question 8

What colour change happens at the cathode due to the basic hydroxyl ions

Answer 8

Green- purple

Question 9

Give the chemical equation for the reaction that takes place at the cathode

Answer 9

_ _

2H2O + 2e -> H2 + 2OH

Question 10

State whether reduction or oxidation takes place at the cathode or anode

Answer 10

Oxidation-anode

Reduction-cathode