Chemistry · May / June 2017 · Paper 11 · Question 14
5070Electrolysis
Concentrated aqueous calcium iodide undergoes electrolysis in a similar way to concentrated aqueous sodium chloride. [diagram of electrolysis cell with positive electrode, negative electrode, graphite, concentrated aqueous calcium iodide] What would be formed at each electrode?
- Aiodine; calcium
- Biodine; hydrogen
- Coxygen; calcium
- Doxygen; hydrogen
As printed in the paper
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Correct answer: B. iodine; hydrogen
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