Home
Class 12
CHEMISTRY
E^(o) ""(RP)" for " Fe^(+2)//Fe and Sn^(...

`E^(o) ""_(RP)" for " Fe^(+2)//Fe and Sn^(+2)//Sn` electrodes are `- 0.75 and - 0.45` volt respectively. The standard emf for cell `F^(+2)+Sn rarr Sn^(+2) + Fe` is :

A

`+.030v`

B

`-0.58v`

C

`+0.58v`

D

`-0.300`

Text Solution

Verified by Experts

The correct Answer is:
D
The two half cell reactions are
`SnrarrSn^(2+)+2e^ (-)`
`Fe^(2+)+2e^(-)rarrFe`
`therefore` cell representation is
`Sn|Sn^(2+)||Fe^(2+)|Fe`
`E_("cell")^(@)=E_(Fe^(2+)//Fe)^(@)-E_(Sn^(2+)//Sn)^(@)`
`=-0.44V-(-0.14V)=0.30V`
Promotional Banner

Similar Questions

Explore conceptually related problems

The standard electrode potentials (reduction) of Pt//Fe^(3+),Fe^(+2) and Pt//Sn^(4+),Sn^(+2) are +0.77V and 0.15V respectively at 25^(@)C . The standard EMF of the reaction Sn^(4+) +2Fe^(2+) rarr Sn^(2+) +2Fe^(3+) is

If E_(Fe^(3+)//Fe)^(@) and E_(Fe^(2+)//Fe)^(@) are -0.36 V and 0.439 V respectively, then value of E_(Fe^(3+)//Fe^(2+))^(@) is

The E^(o) for half cells Fe//Fe^(2+) and Cu//Cu^(2+) are +0.44 V and -0.32 V respectively. Then which of these is true?

The standard electrode potential for the reactions, Ag^(+)(aq)+e^(-) rarr Ag(s) Sn^(2+)(aq)+2e^(-) rarr Sn(s) at 25^(@)C are 0.80 volt and -0.14 volt, respectively. The emf of the cell Sn|Sn^(2+)(1M)||Ag^(+)(1M)Ag is :

If E^(c-)._(Fe^(3+)|Fe) and E^(c-)._(Fe^(2+)|Fe) are =-0.36 V and -0.439V , respectively, then the value of E^(c-)._(Fe^(3+)|Fe^(2+))

If E^(c-)._(Fe^(3+)|Fe) and E^(c-)._(Fe^(2+)|Fe) are =-0.36 V and -0.439V , respectively, then the value of E^(c-)._(Fe^(3+)|Fe^(2+))

Balance the following equations a. Fe^(2+) + Sn^(+2) rarr Sn^(4+) + fe^(2+)

Which one of the following will increase the voltage of the cell ? (T = 298 K) Sn+ 2Ag^+ rarr Sn^(2+) +2 Ag .

Given E^(c-)._(Fe^(2+)|Fe) and E^(c-)._(Fe^(3+)|Fe^(2+)) are -0.44 and 0.77V respectively. If Fe^(2+),Fe^(3+) and Fe blocks are kept together, then

Given, standard electrode potentials, {:(Fe^(3+)+3e^(-) rarr Fe,,,E^(@) = -0.036 " volt"),(Fe^(2+)+2e^(-)rarr Fe,,,E^(@) = - 0.440 " volt"):} The standard electrode potential E^(@) for Fe^(3+) + e^(-) rarr Fe^(2+) is :