The more positive the value of `E^(θ)`, the greater is the trendency of the species to get reduced. Using the standard electrode potential of redox coples given below find out which of the following is the strongest oxidising agent.
`E^(θ)` values: `Fe^(3+)//Fe^(2+) = +0.77`
`I_(2)(s)//I^(-) = +0.54`,
`Cu^(2+)//Cu = +0.34, Ag^(+)//A = 0.80V`

Options

A. 10 millimol
B. 30 millimoles
C. 20 millimoles
D. Quanitative estimation cant be made from given data

Answer

A

Explanation

No of meq of `Cr_(2)O_(6)^(2-) =` no of meq of `FeC_(2)O_(4) = 50 xx 0.1 xx 6`
`:.` m mol of `FeSO_(4) = (30)/(3) = 10`
`( :'n`-factor of `FeC_(2)O_(4) = 3)`