Question detail
Explain why ionic compounds must be molten or dissolved in water for electrolysis to occur.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Electrolysis
Question
Explain why ionic compounds must be molten or dissolved in water for electrolysis to occur.
Answer
Ionic compounds must be molten or dissolved in water to conduct electricity because in these states, the ions are free to move. In solid form, the ions are fixed in place within the lattice structure and cannot migrate to the electrodes.
Explanation
This answer addresses the requirement for ionic compounds to be in a molten or aqueous state for electrolysis, highlighting the importance of ion mobility for the conduction of electricity.
Common mistake
Confusing electrolysis with simple decomposition
Students think electrolysis is the same as a chemical decomposition reaction that occurs spontaneously, without the need for electricity or ion movement.
Explain that electrolysis is a specific type of decomposition that requires an external electric current to drive the separation of ions in a molten or aqueous ionic compound into their constituent elements at the electrodes.
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