Question

PbS□(→┴Heat)A+ PbS□(→┴High temp.)Pb+SO₂
Identify A
(a) PbO (b) PbSO₄
(c) None (d) (a) or (b)

Answer 1

A is PbSO4

Explanation:

Balanced chemical equation is given by:

PbSO4+PbS-------- 2Pb+2SO2

The above reaction is the redox reaction

the electron accepted and donated as

2Pb^2+  + 4e-------2Pb ( Reduction of Pb from Pb 2+ to Pb ^0)

For sulphur

S^2-  -6e----------- S^4   (OXIDATION OF SULPHUR 2- TO SULPHUR +4)

Reduction of sullphur

S^6+2e--------S^4       (reduction of sulphur form +6 to +4)

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