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Define equivalent mass of an reducing agent. How would you determine the equivalent mass of Ferrous sulphate? |
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Answer» Solution :The EQUIVALENT mass of a reducing agent is the number of parts by mass of the reducing agent which is COMPLETELY oxidised by 8 parts by mass of oxygen or one equivalent of any oxidising agent. Ferrous sulphate is a reducing agent. `2FeSO_(4)+H_(2)SO_(4)+[O]rarrFe_(2)(SO_(4))_(3)+H_(2)O` 16 parts by mass of oxygen oxidised 304 parts by mass of `FeSO_(4)` `:.` 8 parts by mass of oxygen will oxidise `316/80 xx8`parts by mass of ferrous sulphate = 152 The equivalent mass of ferrous sulphate (anhydrous) = 152. The equivalent mass of CRYSTALLINE ferrous sulphate is `(FeSO_(4)*7H_(2)O)`=152+156=278 The equivalent mass of crystalline ferrous sulphate = 278. |
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