Home
Class 12
CHEMISTRY
The standard reductino potentials E^(c-)...

The standard reductino potentials `E^(c-)` for the half reactinos are as follows`:`
`ZnrarrZn^(2+)+2e^(-)" "E^(c-)=+0.76V`
`FerarrFe^(2+)+2e^(-) " "E^(c-)=0.41V`
The `EMF` for the cell reaction
`Fe^(2+)+Znrarr Zn^(2+)+Fe`
is

A

`-0.35V`

B

`+0.35V`

C

`+1.17V`

D

`-1.17V`

Text Solution

Verified by Experts

The correct Answer is:
b
`Fe^(2+)+Znrarr Zn^(2+)+Fe`
`Zn rarr Zn^(2+)+e^(-)," "E^(c-)=+0.76V`
`Fe rarr Fe^(2+)+2e^(-)," "E^(c-)=+0.41V`
These are oxidation potentials.
Reduction potential are equal and opposite.
`Fe` forms cathode and `Zn` forms anode.
`E^(c-)._(cell)=(E^(c-)._(red))_(c)+(E^(c-)._(o x i d))_(a)`
`=(0.41+0.760)V`
`=0.35V`
Promotional Banner

Topper's Solved these Questions

  • ELECTROCHEMISTRY

    CENGAGE CHEMISTRY|Exercise Archieves Fill In The Blanks|4 Videos

  • ELECTROCHEMISTRY

    CENGAGE CHEMISTRY|Exercise Archieves True/False|1 Videos

  • ELECTROCHEMISTRY

    CENGAGE CHEMISTRY|Exercise Archieves Multiple Correct Ansers|2 Videos

  • D AND F BLOCK ELEMENTS

    CENGAGE CHEMISTRY|Exercise Archives Subjective|29 Videos

  • GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF ELEMENTS

    CENGAGE CHEMISTRY|Exercise Archives (Subjective)|14 Videos

Similar Questions

Explore conceptually related problems

The standard oxidation potentials, , for the half reactions are as follows : Zn rightarrow Zn^(2+) + 2e^(-) , E^(@) = +0.76V Fe rightarrow Fe^(2+)+ 2e^(-), E^(@) = + 0.41 V The EMF for the cell reaction, Fe^(2+) + Zn rightarrow Zn^(2+) + Fe

The standard reduction potential E^(@) for the half reactions are as : E^(@) Znrightarrow Zn^2+),E^(@) = +0.76V Fe rightarrow Fe^(2+)+ 2e^(-), E^(@) = 0.41V , The emf for the cell reaction, Fe^(2+)+ZnrightarrowZn^(2+) + Fe is ,

The standard oxidation potentials, E^(@) , for the half reactions are as, Zn rarr Zn^(2+) + 2e^(-), " " E^(@) = + 0.76 volt Fe rarr Fe^(2+) + 2e^(-), " " E^(@) = +0.41 volt The emf of the cell, Fe^(2+) + Zn rarr Zn^(2+) + Fe is:

The standard oxidation potential, E^(@) , for the reactions are given as: Zn rightarrow Zn^(2+) + 2e^(-) , E^(@) = +0.76V Fe rightarrow Fe^(2+) + 2e^(-) , E^(@) = +0.41V The emf for the cell : Fe^(2+) + Zn rightarrow Zn^(2+) + Fe

The standard potential E^(@) for the half reactions are as : Zn rarr Zn^(2+) + 2e^(-), E^(@) = 0.76V Cu rarr Cu^(2+) +2e^(-) , E^(@) = -0.34 V The standard cell voltage for the cell reaction is ? Zn +Cu^(2) rarr Zn ^(2+) +Cu

The standard reduction potential E^(@) , for the half reaction are : {:(Zn rarr Zn^(2+) + 2e^(-),,,E^(@) = 0.76 V),(Cu rarr Cu^(2+) + 2e^(-),,,E^(@) = 0.34 V):} The emf for the cell reaction, Zn(s)+Cu^(2+) rarr Zn^(2+) + Cu(s) is :

Electrode potential for the following half-cell reactions are Zn rarr Zn^(2+)+2e^(-), E^(@)=+0.76V, Fe rarr Fe^(2+)+2e^(-), E^(@)=+0.44V The EMF for the cell reaction Fe^(2+)+Zn rarr Zn^(2+)+Fe will be

The standard oxidation potential E^(@) for the half cell reactions are Zn rarrZn^(2+)+2e^(-):E^(@)=+0.76V FerarrFe^(2+)+2e^(-)"E^(@)=+0.41V EMF of the cell reaction Fe^(2+)+ZnrarrZn^(2+)+Fe will be

CENGAGE CHEMISTRY-ELECTROCHEMISTRY-Archieves Single Correct
  1. The reaction 1//2Hg(g)+AgCl(s) rarr H^(o+)(aq)+Cl^(c-)(aq)+Ag(s) oc...

    Text Solution

    |

  2. When a lead storage battery is discharged.

    Text Solution

    |

  3. The standard reductino potentials E^(c-) for the half reactinos are as...

    Text Solution

    |

  4. The standard reduction potentials of Cu^(2+)|Cu and Cu^(2+)|Cu^(o+) ar...

    Text Solution

    |

  5. The standard reduction potential values of three metallic cations, X,Y...

    Text Solution

    |

  6. The gasX at 1 atm is bubbled through a solution containing a mixture o...

    Text Solution

    |

  7. For the electrochemical cell, (M|M^(o+))||(X^(c-)|X),E^(c-).((M^(o+)|M...

    Text Solution

    |

  8. Arrange the following compounds in the order of increasing conductanc...

    Text Solution

    |

  9. A standard solution of KNO(3) is used to make salt bridge, because

    Text Solution

    |

  10. Standard electrode potential data are useful for understanding the sui...

    Text Solution

    |

  11. In an electrolytic cell, the flow of electrons is form

    Text Solution

    |

  12. Zn|Zn^(2+)(a=0.1M)||Fe^(2+)(a=0.01M)Fe. The EMF of the above cell i...

    Text Solution

    |

  13. The rusting of iron takes place as follows : 2H^(o+)+2e^(-) +(1)/(2...

    Text Solution

    |

  14. Electrolysis of dilute aqueous NaCl solution was carried out by passin...

    Text Solution

    |

  15. Consider the following cell reation : 2Fe(s)+O(2)(g)+4H^(o+)(aq) rar...

    Text Solution

    |

  16. AgNO(2)(aq) was added to an aqueous KCl solution gradually and the con...

    Text Solution

    |

  17. given E(S(2)O(8)^(2-)//SO(4)^(2-)^(@)=2.05V E(Br(2)//Br^(-))^(@)=1.4...

    Text Solution

    |

  18. The metal that cannot obtained by electrolysis of an aqueous solution ...

    Text Solution

    |

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

    Text Solution

    |

  20. The equivalent conductance of NaCl at concentration of C and at infini...

    Text Solution

    |