Half Equations in Electrolysis (OCR GCSE Chemistry A (Gateway Science Suite)): Quizzes

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Half Equations in Electrolysis
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What do half equations in electrolysis represent?

Oxidation or reduction processes

Which process occurs at the cathode during electrolysis?

Reduction

Which process occurs at the anode during electrolysis?

Oxidation

What happens to ions at the cathode?

They gain electrons

What happens to ions at the anode?

They lose electrons

What is the cathode half equation for aluminium ions?

Al3++3e−→AlAl^{3+} + 3e^- \to Al

What is the anode half equation for oxide ions?

2O2−→O2+4e−2O^{2-} \to O_2 + 4e^-

How many electrons does an aluminium ion gain at the cathode?

Three electrons

How many electrons are released in the oxygen half equation?

Four electrons

Why is it important to balance charges in half equations?

To verify correct equation

Which industry uses electrolysis for metal extraction?

Aluminium extraction

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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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Reactivity of Metals

Reactions of Acids

Electrolysis

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