Electrolysis of Solutions - GCSE Chemistry Quiz

What is electrolysis?

• Using electricity to break down electrolytes to form elements

• Using heat to break down compounds

• Using light to form new compounds

• Using pressure to separate elements

What ions are formed when water molecules naturally dissociate?

• Hydrogen ions and hydroxide ions

• Sodium ions and chloride ions

• Potassium ions and nitrate ions

• Calcium ions and carbonate ions

What is the overall balanced equation for the electrolysis of acidified water?

• 2H2O(l) → 2H2(g) + O2(g)

• H2O(l) → H2(g) + O2(g)

• 2H2O(l) → H2(g) + 2O2(g)

• H2O(l) → 2H2(g) + O2(g)

What is produced at the cathode during the electrolysis of sodium chloride solution?

• Sodium

• Hydrogen

• Oxygen

• Chlorine

What is produced at the cathode during the electrolysis of copper chloride solution?

• Oxygen

• Chlorine

• Hydrogen

• Copper

What is produced at the anode if halide ions are present?

• The corresponding metal

• The corresponding halogen

• Oxygen

• Hydrogen

What is produced at the anode during the electrolysis of sodium sulfate solution?

• Hydrogen

• Sulfur

• Sodium

• Oxygen

Which ions are attracted to the cathode during the electrolysis of acidified water?

• H+ ions

• OH- ions

• Cl- ions

• Na+ ions

Which ions are attracted to the anode during the electrolysis of acidified water?

• Cl- ions

• H+ ions

• OH- ions

• Na+ ions

What is an electrolyte?

• A gas that conducts electricity

• A solid that conducts electricity

• A substance which, when molten or in solution, will conduct an electric current

• A substance that does not conduct electricity