Home
Class 12
CHEMISTRY
Given: E(Zn^(+2)//Zn)^(@) =- 0.76V E...


Given:
`E_(Zn^(+2)//Zn)^(@) =- 0.76V`
`E_(Cu^(+2)//Cu)^(@) = +0.34V`
`K_(f)[Cu(NH_(3))_(4)]^(2+) = 4 xx 10^(11)`
`(2.303R)/(F) = 2 xx 10^(-4)`
Find emf at cell of `200K` if `E^(@)` values are independent of temperature `[log 2= 0.3]`

A

1.7 V

B

1.08 V

C

1.09 V

D

1.10 V

Text Solution

Verified by Experts

The correct Answer is:
B
`E_(cell)=E_(cell)^(0)-(2.303RT)/(nF)log(((Zn^(+2)))/((Cu^(+2))))`
`=0.76+0.34-(2.303xx8.31xx200)/(2xx96500)log((2)/(0.2))=1.08"volt"`
Promotional Banner

Topper's Solved these Questions

  • ELECTROCHEMISRY

    RESONANCE ENGLISH|Exercise Exercise 3|7 Videos

  • ELECTROCHEMISRY

    RESONANCE ENGLISH|Exercise Part 2|23 Videos

  • ELECTROCHEMISRY

    RESONANCE ENGLISH|Exercise Objective Questions|41 Videos

  • ELECTRO CHEMISTRY

    RESONANCE ENGLISH|Exercise PHYSICAL CHEMITRY (ELECTROCHEMISTRY)|53 Videos

  • EQUIVALENT CONCEPT & TITRATIONS

    RESONANCE ENGLISH|Exercise Part -IV|22 Videos

Similar Questions

Explore conceptually related problems

Given: E_(Zn^(+2)//Zn)^(@) =- 0.76V E_(Cu^(+2)//Cu)^(@) = +0.34V K_(f)[Cu(NH_(3))_(4)]^(2+) = 4 xx 10^(11) (2.303R)/(F) = 2 xx 10^(-4) When 1 mole of NH_(3) added to cathode compartement than emf of cell is (at 298K) :

Given: E_(Zn^(+2)//Zn)^(@) =- 0.76V E_(Cu^(+2)//Cu)^(@) = +0.34V K_(f)[Cu(NH_(3))_(4)]^(2+) = 4 xx 10^(11) (2.303R)/(F) = 2 xx 10^(-4) At what concentration of Cu^(+2) emf of the cell will be zero (at 298K) and concentration of Zn^(+2) is remains same:

E_(Cu^(2+)//Cu)^(@) =0.43V E_(Cu^(+)//Cu)^(@)=0.55V E_(Cu^(2+)//Cu^(+))^(@) =

E_(Cu^(2+)//Cu)^(@)=0.34V E_(Cu^(+)//Cu)^(@)=0.522V E_(Cu^(2+)//Cu^(+))^(@)=

E_(Cu^(2+)//Cu)^(@)=0.34V E_(Cu^(+)//Cu)^(@)=0.522V E_(Cu^(2+)//Cu^(+))^(@)=

Given that E_(Cu^(2+)//Cu)^(0)=0.337 and E_(Cu^(+)//Cu^(2+))^(0)=-0.153V . then calculate E_(Cu^(+)//Cu)^(0)

Given that E_(cu^(+2)//cu)^(@)=+0.34 V E_(Mg^(+2)//Mg)^(@)=-2.37V which of the following correct

Given E_(Ag^(+)//Ag)^(@)=+0.80 V, E_(Cu^(2+)//Cu)^(@)=+0.34 V, E_(Fe^(3+)//Fe^(2+))^(@)=+0.76 V, E_(Ce^(4+)//Ce^(3+))^(@)=+1.60 V Which of the following statements is not correct ?

If E_(Cu^(2+)|Cu)^(@) = 0.34V and E_(Cu^(2+)|Cu^(+))^(@)= 0.15 V then the value for disproportion for Cu^(+) is :

E^(@) of Fe^(2 +) //Fe = - 0.44 V, E^(@) of Cu //Cu^(2+) = -0.34 V . Then in the cell

RESONANCE ENGLISH-ELECTROCHEMISRY-Comprehension
  1. If an element can exist in several oxidation states, it is convernient...

    Text Solution

    |

  2. If an element can exist in several oxidation states, it is convernient...

    Text Solution

    |

  3. Given: E(Zn^(+2)//Zn)^(@) =- 0.76V E(Cu^(+2)//Cu)^(@) = +0.34V K...

    Text Solution

    |

  4. Given: E(Zn^(+2)//Zn)^(@) =- 0.76V E(Cu^(+2)//Cu)^(@) = +0.34V K...

    Text Solution

    |

  5. Given: E(Zn^(+2)//Zn)^(@) =- 0.76V E(Cu^(+2)//Cu)^(@) = +0.34V K...

    Text Solution

    |

  6. The molar conductance of NaCl varies with the concentration as shown i...

    Text Solution

    |

  7. The molar conductance of NaCl varies with the concentration as shown i...

    Text Solution

    |

  8. The molar conductance of NaCl varies with the concentration as shown i...

    Text Solution

    |

  9. Strong acid versus strong base: The principle of conductometric titr...

    Text Solution

    |

  10. The graph represents the titration curve for : a.Strong acid and stro...

    Text Solution

    |

  11. Tollen's reagent is used for the detection of aldehyde when a solution...

    Text Solution

    |

  12. Tollen reagent is used for the detection of aldehydes. When a solution...

    Text Solution

    |

  13. Tollen reagent is used for the detection of aldehydes. When a solution...

    Text Solution

    |

  14. We have taken a saturated solution of AgBrK(sp) of AgBr is 12 xx 10^(-...

    Text Solution

    |

  15. Chemical reaction involve interaction of atoms and molecules. A large ...

    Text Solution

    |

  16. If the cathode is a Hg electrode, the maximum weight (g) of amalgam fo...

    Text Solution

    |

  17. Chemical reaction involve interaction of atoms and molecules. A large ...

    Text Solution

    |

  18. Redox reactions play a pivotal role in chemistry and biology. The valu...

    Text Solution

    |

  19. Redox reactions play a pivotal role in chemistry and biology. The valu...

    Text Solution

    |

  20. Redox reactions play a pivotal role in chemistry and biology. The valu...

    Text Solution

    |