Home
Class 12
CHEMISTRY
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_(2)O_(8)^(2-))` in acidic solution.

B

`O_(2)(g)` is reduced to water.

C

Water is oxidized to `O_(2)`

D

`S_(2)O_(8)^(2-)` ions are reduced to `SO_(4)^(2-)` ions.

Text Solution

Verified by Experts

The correct Answer is:
c,d
Create a cell with required cell reaction `:`
`O_(2)+SO_(4)^(2-)rarr S_(2)O_(8)^(2-)+H_(2)O, E^(c-)._(cell)=1.23-2.01lt0`
`implies ` Spontaneous cell reaction `: (` reverse reaction `),i.e.,`
`H_(2)O+S_(2)O_(8)^(2-) rarr O_(2)+SO_(4)^(2-)`
Promotional Banner

Similar Questions

Explore conceptually related problems

Complete the following chemical equations: (i) MnO_(4)^(-) (aq) + S_2O_(3)^(2-) (aq) + H_2O(l) to (ii) Cr_(2)O_(7)^(2-) (aq) + Fe^(2+) (aq) + H^(+)(aq) to

Identify the reducing agent and oxidizing agent in the following reactions : 2H_(2)+O_(2) to 2H_(2)O

At constant P and T which of the following statement is correct for, C (s) + O_(2)(g) rarr CO_(2) (g)

For the reaction : C(s) + O_(2)(g) rarr CO_(2)(g)

In a simple electrochemical cell, the half cell reduction reaction with their standard electrode potentials are : Pb(s)-2e^(-) rarr Pb^(2+)(aq) , E^(@)= - 0.30 V Ag(s) -e^(-) rarr Ag^(+) (aq), E^(@)= + 0.80 V Which of the following reaction takes place ?

From the following data at 25^(@)C Cr^(3+)(aq.)+3e^(-)rarr Cr^(2+)(aq.) , E^(@)= -0.424V Cr^(2+)(aq.)+2e^(-) rarr Cr(s), " "E^(@)= -0.900V Find E^(@) at 25^(@)C for the reaction : Cr^(3+)+3e^(-) rarr Cr(s)

The reaction H_(2)S+H_(2)O_(2)rarrS+2H_(2)O shows

Given that O(g) + e^(-) rarr O^(-)(g) Delta H = - 142 kJ mol^(-1) O(g) + 2e^(-) rarr O^(2-)(g) DeltaH =+712kJmol^(-1) The heat change for the reaction O^(-)(g) + e^(-) rarr O^(2-)(g) is :

Given that 2C(s) + 2O_(2)(g) rarr 2CO_(2)(g) Delta H = -787 kJ H_(2)(g) + (1)/(2)O_(2)(g) rarr H_(2)O(l) Delta H = -286 kJ C_(2)H_(2)(g) + (2) (1)/(2) O_(2)(g) rarr 2CO_(2)(g) + H_(2)O(l) Delta H = -1301 kJ Heat of formation of acetylene is :