Chemistry · Oct / Nov 2024 · Paper 42 · Question 2
0620
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The question as text
Aluminium is manufactured by the electrolysis of aluminium oxide.
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2(a)[1]
bauxite
2(b)[1]
cryolite
2(c)[1]
(it has) mobile ions
2(d)(i)[3]
M1 4
Al 3+ + 3e- → Al
M2 Al 3+ AND e-
M3 correct equation
2(d)(ii)[1]
electrons are lost (from oxide ions)
2(d)(iii)[2]
M1 anode / electrode made of carbon or graphite
M2 anode / electrode reacts with oxygen / burns / combusts (in oxygen)
2(e)[1]
aluminium is resistant to corrosion
2(f)[3]
M1 eight crosses in second shell of Al
M2 seven dots and one cross in second shell of each F
M3 ‘3+’ charge on Al ion on correct answer line AND ‘–‘ charge on each F ion on correct answer line
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