Why is molten lead bromide considerd as redox reaction
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when electricity is passed through molten lead bromide , it decomposes to Pb 2+ ions and Br- ions . The Pb2+ ions move towards cathode and gain 2 electrons to form lead atoms .So Pb2+ ions are reduced . Side by side the Br- ions move towards anode and loose electrons to form bromine gas.Thus, Bromine ions are oxidized. Hence electrolysis of lead bromide is a redox reaction.
PbBr2( l) -> Pb( l) +Br( g)
At cathode-- Pb2+ + 2e -> Pb( l)
At anode -- 2Br- -> Br2( g) +2e.
PbBr2( l) -> Pb( l) +Br( g)
At cathode-- Pb2+ + 2e -> Pb( l)
At anode -- 2Br- -> Br2( g) +2e.
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