Electrolysis Experperiment 1 (Sodium Sulfate Solution) Flashcards Preview

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Flashcards in Electrolysis Experperiment 1 (Sodium Sulfate Solution) Deck (11)
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0
Q

What is forming at the anode?

A

Hydrogen ions and oxygen

1
Q

Explain how the experiment is carried out

A

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.

2
Q

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

A

Acidic

3
Q

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

A

Red

4
Q

Give the chemical equation of what happens at the anode

A

+ _

2H2O -> O2 + 4H + 4e

5
Q

What is formed at the cathode?

A

Hydroxyl ions. Hydrogen gas is also produced.

6
Q

What does hydroxyl ions do to the solution?

A

Turns it alkaine

7
Q

Are hydroxyl ions acidic or basic?

A

Basic

8
Q

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

A

Green- purple

9
Q

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

A

_ _

2H2O + 2e -> H2 + 2OH

10
Q

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

A

Oxidation-anode

Reduction-cathode