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2018 Paper One

Question Six
Some students stated that the circuit was completed by the flow of electrons.
A small number of students could state that the left-hand electrode’s concentration needed to be 1 mol dm-3.
Many students neglected to give state symbols.
Many students could state that the concentration of copper ions would increase but then thought that the reagents would run out.

It allows the movement of ions

Not standard concentration (1 molar)

The concentration increases. The EMF of the cell decreases to 0.0V since the concentration of ions becomes equal.
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