Electrolysis of molten lead bromide is carried out.
The bulb will not light until the lead bromide has melted. Why not?
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Explanation:
The bulb won't glow when the electrodes are emebedded in solid lead bromide. ... The bulb will glow when the material surrounding the electrodes is molten lead bromide. When an ionic compound is in the molten (liquid) form the positive and negative ions are free to move around.
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