Question detail
Explain the products formed at the electrodes during the electrolysis of molten lead bromide.
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 the products formed at the electrodes during the electrolysis of molten lead bromide.
Answer
During the electrolysis of molten lead bromide, lead ions (Pb²⁺) move to the cathode where they gain electrons to form lead metal. Bromide ions (Br⁻) move to the anode where they lose electrons to form bromine gas.
Explanation
This answer demonstrates understanding of the movement and discharge of ions at the electrodes, which is essential for explaining the products of electrolysis. It tests the student's ability to connect ionic movement to the resulting chemical products.
Common mistake
Misunderstanding Ion Movement
Students often confuse the movement of ions during electrolysis, thinking that positive ions move to the anode instead of the cathode.
Remember that positive ions are attracted to the negative electrode (cathode) where they gain electrons, while negative ions move to the positive electrode (anode) to lose electrons.
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