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Q1 / 5
Electrolysis
Foundation
2 marks
Why must an ionic compound be molten or dissolved before it can be electrolysed?
A
Solid ions are fixed; molten/dissolved ions are mobile and can move to electrodes — mobility is required for electrolysis
B
The compound needs to be heated to decompose into elements first
C
Electrolysis works on all solids — no need to melt
D
The solvent provides extra ions needed for electrolysis
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