Engineering
Chemistry
Types of Redox Reaction
Equivalent Mass and n factor
Question

Calculate the oxidation number of S in Na2S4O6

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Solution
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Na 2S4O6

(2) & (3) Sulphur atom have zero oxidation no. because bond between same atom doesn't develop any charge.
(1) 2 (2) sulphur atom have oxidation no. x which need to bedeforoine.
for

S4  O6–2

  2+ 6 × (– 2) = – 2

= +5

Oxidation no. of S in Na2S4O6 is +5.

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