Question detail
Explain why lead bromide must be molten 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 lead bromide must be molten for electrolysis to occur.
Answer
Lead bromide must be molten for electrolysis to occur because in its solid state, the ions are fixed in a lattice structure and cannot move. When molten, the ions are free to move, allowing them to conduct electricity and participate in the electrolysis process.
Explanation
This answer effectively explains the necessity of the molten state for ionic compounds during electrolysis. It tests the student's understanding of ionic bonding and the physical state changes required for electrolysis to take place.
Common mistake
Common Misunderstanding of Electrolysis Products
Students often confuse the products formed at the electrodes during the electrolysis of molten lead bromide, thinking that both lead and bromine are produced at the cathode.
Remember that during the electrolysis of molten lead bromide, lead is produced at the cathode and bromine is produced at the anode. Visualizing the process and recalling that positive ions move to the cathode and negative ions move to the anode can help clarify this.
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