Year 10-11: IGCSE Electrolysis

What is the product formed at the cathode during the electrolysis of molten magnesium fluoride?

• magnesium
• hydrogen
• fluorine
• oxygen

What is the gas produced at the anode during the electrolysis of dilute hydrochloric acid?

• water

• oxygen

• hydrogen

• chlorine

What is the product formed at the anode during the electrolysis of concentrated copper(II) chloride?

• copper
• chlorine
• hydrogen
• oxygen

Explain why the electrolyte has to be a liquid.

• So the ions can move
• So the electrons can move
• So that it doesn't get too hot
• So the fish are ok

What does the Cathode (-) do to ions?

• Give electrons to the Positive ions to turn them back into atoms
• Take electrons from the positive ions?
• Turn ions back into atoms by removing electrons
• Turn atoms into ions by adding electrons

Describe oxidation in terms of electrons

• oxidation is gain of electrons
• oxidation is loss of electrons

Describe reduction in terms of electrons

• reduction is gain of electrons
• reduction is loss of electrons

Why can ionic compounds not conduct electricity when they are solid?

• their electrons are not free to move
• their ions are free to move
• their ions are not free to move
• their electrons are free to move

What type of charge does a metal ion have?

• +
• -

The electrode connected to the positive terminal of a battery is __________.

• cathode
• anode