Electrolysis

Explain why a sample of pure water does not conduct electricity?

State what type of bonding is present in a substance that does not conduct electricity in any state?

Explain why sodium chloride conducts electricity when dissolved in water but not as a solid?

State the term for a liquid or solution that conducts electricity due to the movement of ions?

State the name given to a negatively charged ion?

Explain why cations move towards the cathode during electrolysis?

State the products formed at each electrode during the electrolysis of molten lead(II) bromide?

Explain why lead(II) bromide must be molten for electrolysis to occur?

Write the ionic half-equation for the reaction at the anode during the electrolysis of molten lead(II) bromide, and state whether this is oxidation or reduction?

Predict the products at each electrode when dilute sodium chloride solution is electrolysed using inert electrodes?

Explain why hydrogen is produced at the cathode during the electrolysis of sodium chloride solution, rather than sodium?

Write the ionic half-equation for the reaction at the cathode during the electrolysis of copper(II) sulfate solution, and classify it as oxidation or reduction?

Describe one observation at the cathode and one at the anode during the electrolysis of copper(II) sulfate solution using graphite electrodes?

State what is meant by reduction in terms of electron transfer?

Explain why the reaction at the anode during electrolysis is always classified as oxidation?

Write the ionic half-equation for the reaction at the anode during the electrolysis of dilute sulfuric acid?

Identify the independent variable in an investigation comparing the electrolysis products of different aqueous solutions?

Explain why graphite electrodes are used rather than copper electrodes in this practical?

Describe the test and expected result to confirm that hydrogen gas is produced at the cathode during the electrolysis of dilute sulfuric acid?

Predict the products at each electrode when copper(II) sulfate solution is electrolysed with graphite electrodes, and explain why copper is produced at the cathode rather than hydrogen?