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Peroxodisulphate salts, (e.g., Na(2)S(2)...

Peroxodisulphate salts, `(e.g., Na_(2)S_(2)O_(8))` are strong oxidizing agents used be bleaching agents for fats, oils, ets.
Given `:`
`O_(2)(g)+4H^(o+)(aq)+4e^(-)rarr 2H_(2)O(l)" "E^(c-)=1.23V`
`S_(2)O_(8)^(2-)(aq)+2e^(-)rarr 2SO_(4)^(2-)(aq)" "E^(C-)=2.01V`
Which of the following statement is `(` are `)` correct ?

A

Oxygen gas can oxidize sulphate ion to per-oxo disulphate ion `(S_2O_8^(-2))` in acidic solution.

B

`O_2(g)` is reduced to water

C

Water is oxidised to `O_2`

D

`S_2O_8^(-2)` ions are reduced to `SO_4^(-2)` ions.

Text Solution

Verified by Experts

The correct Answer is:
CD
Create a cell with required cell reaction
`O_2 +SO_4^(-)2 to S_2O_8^(-)2+H_2O " " E_(cell)^@=1.23-2.01 lt0`
`implies` Nonspontaneous cell reaction
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