Electrolysis of solutions (AQA GCSE Chemistry): Flashcards

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Electrolysis of solutions
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Ions formed when water splits during electrolysis

H+H^+ (hydrogen) and OH−OH^- (hydroxide)

Which electrode attracts positive ions?

Cathode (negative electrode)

Product at cathode when metal more reactive than hydrogen

Hydrogen gas

Product at cathode when metal less reactive than hydrogen

The metal itself

Which electrode attracts negative ions?

Anode (positive electrode)

Product at anode when no halide ions present

Oxygen gas

Product at anode when halide ions present

The halogen element

Which ions react more easily at anode?

Halide ions (over hydroxide ions)

Examples of halide ions

Cl−Cl^-, Br−Br^-, I−I^- (chloride, bromide, iodide)

Product at cathode in sodium chloride solution

Hydrogen gas

Product at anode in sodium chloride solution

Chlorine gas

Product at cathode in copper chloride solution

Copper metal

Tool to predict cathode products in electrolysis

Reactivity series

Explore AQA GCSE Chemistry 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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