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Ion mobility in solid electrolytes
Solid calcium chloride cannot be electrolysed. Give one reason why.
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Marking points
- 1 Explains that ions in the solid are fixed and cannot move.
Full-mark answer
In solid calcium chloride the ions are held in fixed positions and cannot move to the electrodes.
Why this answer loses marks
There are no ions in the solid.
The ions exist but are fixed, so they cannot carry charge to the electrodes.