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basically i want to know how to solve probelms like this:

with which of these does hydrogen peroxide act as a reducing agent:

a.KMnO4 in acid medium

b.K2Cr2O7

c.moist Ag2O

d.aquaoues SO2

its a multicorrect type question

also plz tell me how to determine a stronger oxidising /reducing agents(compounds)

thnx in advance

arpan chandrashekhar , 13 Years ago
Grade
anser 1 Answers
Aman Bansal

Last Activity: 13 Years ago

Dear Arpan,

Hydrogen peroxide has the ability to gain or lose electrons, as its oxygen atoms are in the -1 oxidation state. By gaining electrons they can go to the -2 oxidation state, and by losing electrons they can go to the zero oxidation state (the element)

When someting acts as an oxidising agent is gains electrons (removing them from the oxidised species). This can be shown by the relevant half-equations:

H2O2 + 2e –> 2OH-

or in the presence of acid:

H2O2 + 2H+ + 2e –> 2H2O

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