What is the sum of the lowest oxidation states of sulphur in the following species: S4O2−6,S2O2−3,S2O2−8,S2O2−7
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Solution
Minimum OS of sulphur in S4O2−6=0 Minimum OS of sulphur in S2O2−3=−2 Minimum OS of sulphur in S2O2−8=+6 Minimum OS of sulphur in S2O2−7=+6 Hence, sum of all the above oxidation states =0−2+6+6=10