Home
Class 12
CHEMISTRY
Zn^(2+)(aq) + 2e to Zn(s) E°(Zn^(2+)/Zn)...

`Zn^(2+)(aq) + 2e to Zn(s)` `E°(Zn^(2+)`/`Zn)` = - 0.76V, `Ni^(2+)(aq) + 2e to Ni(s)` `E°(Ni^(2+)`/ `Ni)` = - 0.25V, E°cell = _____

A

0.51V

B

-0.51V

C

1.01V

D

none

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • D-AND F-BLOCK ELEMENTS

    MODERN PUBLICATION|Exercise EXERCISE|291 Videos

  • GENERAL PRINCIPLE OF ISOLATION OF ELEMENTS

    MODERN PUBLICATION|Exercise EXERCISE|190 Videos

Similar Questions

Explore conceptually related problems

Iron may be protected from rusting by coating with zinc or tin. By referring to the data given below, explain why zinc protect iron more effectively than tin? Zn^(2+) + 2e^(-) rarr Zn, E^(@) = - 0.76 V Fe^(2+) + 2e^(-) rarr Fe, E^(@) = - 0.44V Sn^(2+) + 2e^(-) rarr Sn , E^(@) = - 0.14V

Calculate the standard emf of the cell having the cell reaction. Zn(s) + Co^(2+) ( aq) rarr Zn^(2+) ( aq) + Co(s) E_(Zn//Zn^(2+)) ^(@) = 0.76V, E_(Co//Co^(2+))^(@) = 0.25V

Calculate the cell emf and Delta_(r ) G^(@) for the cell reation at 25^(@)C . Zn(s) | Zn^(@+) ( 0.1 M )|| Cd^(2+) ( 0.01M) | Cd(s) Given, E_(Zn^(2+) //Zn)^(@) = - 0.763V , E_(Cd^(2+) //Cd) ^(@) = - 0.403 V 1F = 96500 C "mol"^(-1) R = 8.314 JK^(-1) "mol"^(-1) ], Find E_("cell")^(@) = E_("cathode")^(@) - E_("anode")^(@) then Delta _(r ) G^(@) by using formula, Delta _(r ) G^(@) = - n FE_("cell")^(@)

In the button cells, widely used in watches and other devices, the following reaction takes place Zn (s) + Ag_(2) O(s) + H_(2) O (l) rarrZn^(2+) (aq) + 2Ag(s) + 2OH^(-) (aq) Determine E^(@) and Delta G^(@) for the reaction. (Given, E_(Ag^(+)//Ag)^(@) = + 0.80 V, E_(Zn^(2+)//Zn)^(@) = -0.76 V )

Find the stability constant of the complex [ Zn ( NH_(3))_(4)]^(2+) formed in the reaction, Zn^(2+) + 4NH_(3) hArr [ Zn ( NH_(3))_(4)]^(2+) Given that , E_(Zn^(2+) //Zn)^(@) = - 0.76 V and E_([Zn(NH_(3))_(4)]^(2+)//Zn,4NH_(3))^(@) = - 1.03 V

Consider the standard potential of the following cells, (i) Mg^(2+) +2e rarr Mg,E^@=-2.37V (ii) Zn^(2+) + 2erarrZn,E^@ =-0.76V (iii) Ni^(2+) +2e rarrNi,E^@=-0.25V (iv) Fe^(3+) + 3e rarrFe, E_0=-0.04 V find the strongest reducing agent :

MODERN PUBLICATION-ELECTROCHEMISTRY-EXERCISE
  1. The reduction potential values of M, N and O are +2.46,- 1.13 and 3.13...

    Text Solution

    |

  2. The standard electrode potential of a hydrogen electrode is

    Text Solution

    |

  3. Zn^(2+)(aq) + 2e to Zn(s) E°(Zn^(2+)/Zn) = - 0.76V, Ni^(2+)(aq) + 2e t...

    Text Solution

    |

  4. Electrolytes conduct electricity due to movement of-

    Text Solution

    |

  5. which of the following may not be present in all galvanic cell

    Text Solution

    |

  6. 1F charge will produce 1 mole of metal from the electrolyte

    Text Solution

    |

  7. What amount of electricity is required to deposite 1mole copper from a...

    Text Solution

    |

  8. the metal with greater oxidation potential is

    Text Solution

    |

  9. The electrolytic products of aqueous solution of NaF are

    Text Solution

    |

  10. The exact value of emf of cell can be measured by means of

    Text Solution

    |

  11. The unit of equivalent conductance is

    Text Solution

    |

  12. The charge carried by one mole electron is

    Text Solution

    |

  13. Which of the following solutions can be stored in copper vessel?

    Text Solution

    |

  14. out of Cu,Ag, Zn and Mg the metal which can displace all others from t...

    Text Solution

    |

  15. The number of faradays required to deposit 9gm Al from a solution of A...

    Text Solution

    |

  16. during electrolysis the reaction occurs at cathode is

    Text Solution

    |

  17. For a redox reaction to be spontaneous, the EMF should be

    Text Solution

    |

  18. The electrode potential of normal hydrogen electrode is

    Text Solution

    |

  19. The standard reduction potentials at 25°C of Li^(+) |Li, Ba^(2+) | Ba,...

    Text Solution

    |

  20. The standard reduction electrode potentials of the metals A,B and C ar...

    Text Solution

    |