Electrolysis of Aqueous Solutions (AQA GCSE Chemistry Combined Science): Quizzes

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Electrolysis of Aqueous Solutions
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Why is electrolysis of aqueous solutions more complex than molten ionic compounds?

Water produces H+H^+ and OH−OH^- ions that react

What ions does water produce when it dissociates during electrolysis?

H+H^+ and OH−OH^- ions

At the cathode, which type of ion is reduced during electrolysis of aqueous solutions?

The less reactive ion

At the anode, which type of ion is oxidised during electrolysis of aqueous solutions?

Ion oxidised more easily

What is produced at the cathode during electrolysis of CuSO4CuSO_4 solution?

Solid copper

Why are Cu2+Cu^{2+} ions reduced instead of H+H^+ ions at the cathode in CuSO4CuSO_4 solution?

Copper is less reactive than hydrogen

What is produced at the anode during electrolysis of CuSO4CuSO_4 solution?

Oxygen gas

What happens to reactive cations like Na+Na^+ at the cathode during aqueous electrolysis?

H+H^+ ions reduced instead

What happens when halide ions like Cl−Cl^- are present at the anode?

Halide ions usually oxidised

When are OH−OH^- ions oxidised at the anode during aqueous electrolysis?

When no halide ions present

What physical state is the copper in when it forms at the cathode?

Solid

Which gas is produced when OH−OH^- ions are oxidised at the anode?

Oxygen gas

Explore AQA GCSE Chemistry Combined Science Revision Notes by Topics

Reactivity of Metals

Reactions of Acids

Electrolysis

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Reactivity of Metals

Reactions of Acids

Electrolysis

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Reactivity of Metals

Reactions of Acids

Electrolysis

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Reactivity of Metals

Reactions of Acids

Electrolysis

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