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Question

The equivalent mass of Na2S2O3 as reductant in the reaction is Mx,

Na2S2O3+5H2O+4Cl22NaHSO4+8HCl

The value of x is _____.

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Solution

Na2S2O3+5H2O+4Cl22NaHSO4+8HCl
+2 +6
As each S changes its oxidation by 4, total change in oxidation for one molecule of Na2S2O3=8
So, its equivalent weight is M8.

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