Electrolysis and Ionic Compounds

Electrolysis of H₂SO₄ at the cathode.

• 2H⁺ + 2e⁻ → H₂

• H₂SO₄ → 2H⁺ + SO₄²⁻

• 2H₂O → 2H₂ + O₂

• H₂ + O₂ → 2H₂O

Bromine gas

• Given off as a colorless gas at the anode.

• Given off as a brown gas at the anode.

• Given off as a white gas at the anode.

• Given off as a yellow gas at the anode.

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

• A cathode is the negative electrode of an electrolysis cell.

• A cation is a positively charged ion attracted to the cathode.

• An anion is a positively charged ion attracted to the anode.

• A cathode is the positive electrode of an electrolysis cell.

Focus in electrolysis

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

• Focus on the direction of conventional current only.

• Focus on the movement of protons in the solution.

• Focus on the temperature of the electrolyte.

Charge carriers in the external circuit

• Protons are the charge carriers in the external circuit.

• Neutrons are the charge carriers in the external circuit.

• Electrons are the charge carriers in the external circuit.

• Ions are the charge carriers in the external circuit.

Ion discharge depends on the relative reactivity of elements.

• The reactivity of elements influences which ions are discharged.

• Ion discharge is solely determined by temperature.

• Ion discharge is unrelated to the properties of elements.

• Ion discharge occurs randomly without any influence.

Electrolysis process

• Turn on power and allow electrolysis.

• Mix chemicals in a container.

• Heat the solution to a boiling point.

• Add a catalyst to speed up the reaction.

Charge of the cathode

• The cathode has a positive charge.

• The cathode has a neutral charge.

• The cathode has a negative charge.

• The cathode has a variable charge.

Cl^- ions are discharged during electrolysis?

• At the cathode.

• At the anode.

• In the solution.

• At the electrodes.

Dilute halide solutions produce oxygen at the anode.

• Oxygen is produced from dilute halide solutions.

• Chlorine is produced from concentrated halide solutions.

• Hydrogen is produced from dilute halide solutions.

• Nitrogen is produced from halide solutions.