Using Electrolysis to Extract Metals (OCR GCSE Chemistry A, Combined (Gateway Science Suite)): Flashcards

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Using Electrolysis to Extract Metals
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Method to extract reactive metals from ores

Electrolysis

Primary ore of aluminium

Bauxite

Chemical formula of bauxite

Al2O3Al_2O_3

Purpose of adding cryolite to bauxite

Lowers the melting point

Electrodes used in aluminium extraction

Graphite

Ion attracted to cathode in Al extraction

Al3+Al^{3+}

Process at cathode for Al3+Al^{3+} ions

Gain electrons (reduction)

Equation at cathode for Al extraction

Al3++3e−→Al(l)Al^{3+} + 3e^- \rightarrow Al(l)

Behaviour of molten Al in cell

Sinks to bottom (denser)

Ion attracted to anode in Al extraction

O2−O^{2-}

Process at anode for O2−O^{2-} ions

Lose electrons (oxidation)

Equation at anode for Al extraction

2O2−→O2(g)+4e−2O^{2-} \rightarrow O_2(g) + 4e^-

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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

Explore OCR GCSE Chemistry A, Combined (Gateway Science Suite) Exam Questions by Topics

Reactivity of Metals

Reactions of Acids

Electrolysis

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