Home
Class 12
CHEMISTRY
Consider the following E^o values : E...

Consider the following `E^o` values :
`E^o _Fe^(3+)//FE^(2+)o = + 0.77 V`
`E_(Sn^(2+)//Sn) =- 0.14 V`
Under standard conditions the potential for reaction
`Sn(s) +2Fe^(3+) (aq) rarr 2Fe^(2+) (sq) + Sn^(2+) (aq)` is.

A

`0.91V`

B

`1.40V`

C

`1.68V`

D

`0.63V`

Text Solution

Verified by Experts

The correct Answer is:
A
`Sn -2e rarr Sn^(2+)`
`(2Fe^(3+)+2e rarr 2Fe^(2+))/(Sn+2Fe^(3+) rarr Sn^(2+) +2Fe^(2+))`
`E^(@)cell = (E_(C)^(@) -E_(A)^(@))_(R)`
`=0.77V +0.14V = 0.91V`
Promotional Banner

Topper's Solved these Questions

  • ELECTROCHEMISTRY

    ALLEN|Exercise EXERCISE -05 [B]|38 Videos

  • ELECTROCHEMISTRY

    ALLEN|Exercise EXERCISE-04 [B]|23 Videos

  • CHEMISTRY AT A GLANCE

    ALLEN|Exercise ORGANIC CHEMISTRY|483 Videos

  • HYDROCARBON

    ALLEN|Exercise MCQ|15 Videos

Similar Questions

Explore conceptually related problems

Consider the following E^(@) values E^(o)""_(Fe^(3+)//Fe^(2+))= +0.77 V" "E^(o)""_(Sn^(2+)//Sn)= 0.14V Under standard conditions the EMF for the reaction Sn(s) + 2Fe^(3+) (aq) rarr 2Fe^(2+)(aq)+Sn^(2+)(aq) is :

Consider the following E^(@) values E^(@) values E_(Fe^(3+)//Fe^(2+))^(@)= 0.77v , E_(Sn^(2+)//Sn)^(@) = -0.14 under standard condition the potential for the reaction Sn_(s)+ 2Fe^(3+)(aq)rightarrow 2Fe^(2+)(aq) + Sn^(2+) (aq) is :

Consider the following E^(@) values. E^(@)underset(M^(3+)//M^(2-)) values for Cr, Mn, Fe and Co are -0.41 Under standard condition, the potential for the reaction : Sn(s) + 2Fe^(3+)(aq) rightarrow2Fe^(2+)(aq) + Sn^(2+)(aq)

Consider the following E^@ values . E_(Fe^(3+)//Fe^(2+)^@ = + 0.77 V , E_(Sn^(2+)//Sn)^@=- 15. V The E_(cell)^@ for the reaction , Sn (s) + 2Fe_(aq)^(3+) rarr 2 Fe_(aq.)^(2+) + Sn_(aq.)^(2+) is :

Consider the following E_(0) values, E_(Fe^(3+)//F^(2+))^(0)=+0.77V, E_(Sn^(2+)//Sn)^(0)=-0.14V , the E_(cell)^(0) for the reaction, Sn_((s))+2Fe_((aq.))^(3+)rarr2F_((aq.))^(2+)+Sn_((aq.))^(2+) is:

E_(Fe^(3+)//Fe)^(@)=-0.036V,E_(Fe^(2+)//Fe)^(@)=-0.0439V . The value of standard electrode potential for the change, Fe^(3+)(aq)+e^(-)toFe^(2+)(aq) will be

ALLEN-ELECTROCHEMISTRY-EXERCISE-05 [A]
  1. The limiting molar conductivities A^(@) for NaCl,KBr nd KCl are 126,15...

    Text Solution

    |

  2. The standard e.m.f. of a cell involving one electron change is found t...

    Text Solution

    |

  3. Consider the following E^o values : E^o Fe^(3+)//FE^(2+)o = + 0.77 ...

    Text Solution

    |

  4. {:("Electrolyte",^^.^(oo)(Scm^(2)mol^(-1))),(KCI,149.9),(KNO(3),145.0)...

    Text Solution

    |

  5. The highest electrical conductivity of the following aqueous solutions...

    Text Solution

    |

  6. Aluminium oxide may be electorlysed at 1000^@C to furnish aluminim met...

    Text Solution

    |

  7. For a spontaneous reaction, DeltaG , equilibrium constant (K) and E(ce...

    Text Solution

    |

  8. The molar conductivities Lambda(NaOAc)^@ and Lambda(HCI)^@ at infinite...

    Text Solution

    |

  9. The resistance of a conductivity cell filled with 0.1 M KCl solution i...

    Text Solution

    |

  10. At 25^(@)C, {:(Ag+I^(-)rarr,AgI+e,,E^(@) =0.152V),(Agrarr,Ag.^(+)+e,,E...

    Text Solution

    |

  11. The cell , Zn | Zn^(2+) (1M) || Cu^(2+) (1M) Cu (E("cell")^@ = 1. 10 V...

    Text Solution

    |

  12. Given E(Cr^(3+)//cr)^@ =- 0.72 V, E(Fe^(2+)//Fe)^@ =- 0.42 V. The pote...

    Text Solution

    |

  13. Given,{:(E(Fe^(3+) //Fe)^o + 3e Cr E^o =- 0.036 V),(E(Fe^(3+) //Fe)^o...

    Text Solution

    |

  14. The Gibbs energy for the decomposition of Al(2)O(3) at 500^(@)C is as ...

    Text Solution

    |

  15. Resistance of 0.2 M solution of an electrolyte is 50 Omega. The specif...

    Text Solution

    |

  16. The reduction potential of hydrogen half cell will be negative if :

    Text Solution

    |

  17. The standard reduction potential for Zn^(2+)//Zn, Ni^(2+)//Ni and Fe^(...

    Text Solution

    |

  18. Given E("Cr(2)O(7)^(2-)//Cr^(3+))^(@)=1.33V,E(MnO(4)^(-)//Mn^(2+))^(@)...

    Text Solution

    |

  19. The equivalent conductance of NaCl at concentration C and at infinite ...

    Text Solution

    |

  20. In which of the following reaction H(2)O(2) acts as a reducing agents?...

    Text Solution

    |