Question: HPbO 2 - + 2 Br - + H 2 O Pb + Br 2 + 3OH - In the above reaction, the oxidation state

HPbO2- + 2Br-+ H2OPb + Br2+ 3OH-

In the above reaction, the oxidation state of lead changes from

____

to

____

. How many electrons are transferred in the reaction?

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