Home
Class 12
CHEMISTRY
EMF of the cell Zn ZnSO(4)(a =0.2)||ZnSO...

`EMF` of the cell `Zn ZnSO_(4)(a =0.2)||ZnSO_(4)(a_(2))|Zn` is `-0.0088V` at `25^(@)C`. Calculate the value of `a_(2)`.

Text Solution

Verified by Experts

The correct Answer is:
`a_(2) = 0.1006M`
`E_(cell) = (0.0591)/(2)log.([0.2])/([a_(2)])`
`(-0.0088 xx 2)/(0.0591) =- log. ([0.2])/([a_(2)])`
`10^(+0.3) = (0.2)/(a_(2))`
`a_(2) = 0.1006`
Promotional Banner

Topper's Solved these Questions

  • ELECTROCHEMISTRY

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

  • ELECTROCHEMISTRY

    ALLEN|Exercise EXERCISE-05 [A]|28 Videos

  • ELECTROCHEMISTRY

    ALLEN|Exercise EXERCISE-03|24 Videos

  • CHEMISTRY AT A GLANCE

    ALLEN|Exercise ORGANIC CHEMISTRY|483 Videos

  • HYDROCARBON

    ALLEN|Exercise MCQ|15 Videos

Similar Questions

Explore conceptually related problems

The EMF of the cell, Zn|Zn^(2+) (0.1 M) || Cd^(2+) (M_(1)) |Cd has been found to be 0.3305 V at 298 K . Calculate the value of M_(1) [E_((Zn^(2+) |Zn))^(@) = - 0.76 V , E_((Cd^(2+) |Cd))^(Theta) = -0.40 V]

CuSO_(4)+Zn(s) to ZnSO_(4)+Cu

The emf of a cell corresponding to the reaction. Zn(s)+ 2H^(+)(aq)rightarrow Zn^(2+)(0.1M)+H_(2) (g,1atm) is 0.28 V at 25^(@) C . Calculate pH of the solution.

In the reaction of Zn + FeSO_(4) to ZnSO_(4) + Fe

In the reaction , Zn+H_(2)SO_(4) to ZnSO_(4) +H_(2) , zinc acts as

CuSO_(4)(aq.)+Zn(s) to ZnSO_(4)+Cu uarr

ALLEN-ELECTROCHEMISTRY-EXERCISE-04 [A]
  1. A current of 3.6A is a passed for 6 hrs between Pt electrodes in 0.5L ...

    Text Solution

    |

  2. Calculate the EMF of a Daniel cell when the concentartion of ZnSO(4) a...

    Text Solution

    |

  3. EMF of the cell Zn ZnSO(4)(a =0.2)||ZnSO(4)(a(2))|Zn is -0.0088V at 25...

    Text Solution

    |

  4. The EMF of the cell M|M^(n+)(0.02M) ||H^(+)(1M)|H(2)(g) (1atm)Pt at 25...

    Text Solution

    |

  5. Equinormal solution of two weak acids, HA(pK(a) =3) and HB(pK(a) =5) a...

    Text Solution

    |

  6. In two vessels each containing 500 ml water, 0.5m mol of aniline (K(b)...

    Text Solution

    |

  7. The emf of the cell Ag|KI(0.05M)||AgNO(3)(0.05M)|Ag is 0.788V. Calcula...

    Text Solution

    |

  8. The cell Pt, H(2) (1atm) H^(+) (pH =x)| Normal calomel Electrode has a...

    Text Solution

    |

  9. Estimate the cell potential of a Daniel cell having 1.0 M Zn^(++) and ...

    Text Solution

    |

  10. Consider the cell AG|AgBr(s)|Br^(-)||AgCI(s)|CI^(-)|Ag at 25^(@)C. The...

    Text Solution

    |

  11. The pK(sp) of AgI is 16.07 if the E^(@) value for Ag^(+)//Ag is 0.7991...

    Text Solution

    |

  12. Voltage of the cell Pt, H(2) (1atm)|HOCN(1.3 xx 10^(-3)M)||Ag^(+) (0....

    Text Solution

    |

  13. The standard oxidation potential of Zn referred to SHE is 0.76V and th...

    Text Solution

    |

  14. The standard reduction potential E^(@)(Bi^(3+)//Bi) and E^(@)(Cu^(2+)/...

    Text Solution

    |

  15. Calculate the potential of an indicator electrode versus the standard ...

    Text Solution

    |

  16. K(d) for dissociation of [Ag(NH(3))(2)]^(+) into Ag^(+) and NH(3) is 6...

    Text Solution

    |

  17. The overall formation constant for the reaction of 6 mole of CN^(-) wi...

    Text Solution

    |

  18. Calculate the e.m.f. of the cell Pt|H(2)(1.0atm)|CH(3)COOH (0.1M)||N...

    Text Solution

    |

  19. An external current source giving a current of 5.0A was joined with Da...

    Text Solution

    |

  20. Calculate the equilibrium constant for the reaction: 3Sn(s) +2Cr(2)O...

    Text Solution

    |