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Hydrogen

Question
CBSEENCH11006931

Consider the reaction of water with F2 and suggest, in terms of oxidation and reduction which species are oxidised/ reduced. 

Solution
The reactions of water with F2 are as indicated below:
stack 2 straight F subscript 2 left parenthesis straight g right parenthesis with left parenthesis Oxidant right parenthesis below space plus space stack 2 straight H subscript 2 straight O left parenthesis straight l right parenthesis with left parenthesis Reductant right parenthesis below space space rightwards arrow space space space straight O subscript 2 left parenthesis straight g right parenthesis space plus space 4 straight H to the power of plus left parenthesis aq right parenthesis space plus space 4 straight F to the power of minus left parenthesis aq right parenthesis
or
stack 3 straight F subscript 2 left parenthesis straight g right parenthesis with left parenthesis Oxidant right parenthesis below space plus space stack 3 straight H subscript 2 straight O left parenthesis straight l right parenthesis with left parenthesis Reductant right parenthesis below space rightwards arrow space space straight O subscript 3 left parenthesis straight g right parenthesis space plus space 6 straight H to the power of plus left parenthesis aq right parenthesis space plus space 6 straight F to the power of minus left parenthesis aq right parenthesis
In these reactions, water acts as a reductant and hence itself gets oxidised to either O2 or O3 while F2 acts as an oxidant and is itself reduced to F- ion.