Equivalent mass of Fe2S3 un the below reaction is , if its molar mass is 'M' Fe2S3 +O2 -->Fe2O3 +SO3
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equivalent mass of Fe₂S₃ is M/24.
It is given that molecular mass of Fe₂S₃ is M
we have to find equivalent mass of Fe₂S₃ when
Fe₂S₃ + 6O₂ ----> Fe₂O₃ + 3SO₃
- oxidation state of S in Fe₂S₃ = -2
- oxidation state of S in SO₃ = +6
Valence factor = change in oxidation numbers
= 3 × (+6) - 3 × (-2)
= 18 + 6
= 24
so, equivalent mass = molecular mass/Valence factor
= M/24
hence, equivalent mass of Fe₂S₃ is M/24.
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