Electrolysis and Ionic Compounds

Front

An anion is a negatively charged ion attracted to the anode.

Back

A cathode is the negative electrode of an electrolysis cell.

Front

Charge of the cathode

Back

The cathode has a negative charge.

Front

Charge carriers in the external circuit

Back

Electrons are the charge carriers in the external circuit.

Front

Focus in electrolysis

Back

Focus on the movement of electrons, not the direction of conventional current.

Front

Negative ion migration

Back

Moves towards the anode.

Front

Electrolysis process

Back

Turn on power and allow electrolysis.

Front

Bromine gas

Back

Given off as brown gas at the anode.

Front

Worked Example: Identify the product formed at the anode and cathode during the electrolysis of molten potassium chloride.

Back

The ions present are potassium (K⁺) and chloride (Cl^-). Chloride ions form chlorine gas at the anode, and potassium ions form potassium metal at the cathode.

Front

H^+ ions are discharged during electrolysis?

Back

At the cathode.

Front

H^+ ions form when they gain electrons?

Back

Hydrogen gas.