Extraction of Metals - Result Question 75

####78. Write the balanced chemical reactions involved in the extraction of lead from galena. Mention oxidation state of lead in litharge.

(2003, 2M)

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Solution:

  1. The reactions involved in the extraction of lead from galena (PbS) by self reduction are

2PbS+3O22PbO+2SO2 PbS+2PbO3Pb+SO2 PbS+2O2PbSO4 (side reaction)  PbSO4+PbS2Pb+2SO2

In litharge (PbO), the oxidation state of Pb is +2



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