Question

what is the oxidation number of sulphur in s2o8-2 ? please find it step by step

Answer 1

in S2O8 2- , there is a peroxy bond and while counting or calculating oxidation no. of sulphur, we take oxidation state of those oxygen atoms to be (-1) and so two O atoms with (-2) charge are going to (-1) oxidation state. so change in o.s. is in oxygen atoms not in the sulphur atoms. you can see the strusture of S2O8 2- ion given

in S2O8 2- , there is a peroxy bond and while counting or calculating oxidation no. of sulphur, we take oxidation state of those oxygen atoms to be (-1) and so two O atoms with (-2) charge are going to (-1) oxidation state. so change in o.s. is in oxygen atoms not in the sulphur atoms. you can see the strusture of S2O8 2- ion given below having peroxy linkage in betweeen.