Home
Class 12
CHEMISTRY
Calculate the potential of a Zn -An^(2+)...

Calculate the potential of a `Zn -An^(2+)` electrode in which the molarity of `Zn ^(2+)` is `0.001M.` Given that `E_(Zn^(2+)//Zn)^(0)=-0.76V`
`R=0.314JK^(-1) mol ^(-1), F= 96500C mol ^(-1).`

Text Solution

Verified by Experts

Given electrode `Zn|Zn^(+2)(0.001m)E_(Zn^(+2)//Zn)^(0) =-0.76V`
Nernst equation is
`E=E^(0) +(2.303RT)/(nF) log [M^(n+)]`
Given `R=8.314J//K.`mole
`F = 96500c//`mole
`E= E^(0) +(0.059)/(2)log C`
`=-0.76+(0.059)/(2)log 0.001`
`=-0.76 -(0.059)/(2)xx3`
`= -0.76-0.0295xx3`
`=-0.76-0.0885 =-0.8485V`
Promotional Banner

Topper's Solved these Questions

  • ELECTROCHEMISTRY & CHEMICAL KINETICS

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise VERY SHORT ANSWER QUESTIONS|63 Videos

  • ELECTROCHEMISTRY & CHEMICAL KINETICS

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise SHORT ANSWER QUESTIONS|25 Videos

  • ELECTROCHEMISTRY & CHEMICAL KINETICS

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise DAM SURE|18 Videos

  • D AND F- BLOCK ELEMENTS AND CO-ORDINATION COMPOUNDS

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise INTEXT QUESTIONS|33 Videos

  • GENERAL PRINCIPLES OF MMETALLURGY

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise DAM SURE SAQ|1 Videos

Similar Questions

Explore conceptually related problems

Calculate the emf of the cell at 25^(@)C Cr|Cr^(3+)(0.1M)||Fe ^(2+)(0.01M) |Fe, given that E_(Cr^(3+)//Cr )^(0)=-0.74V and E_(Fe ^(2+)//Fe )^(0)=-0.44V

Calculate the Electrode potential of single electrode. Cu^(2+)(0.01M)//Cu" "(E^(@)= +0.337V)

Which defines the standard reduction electrode potential of Zn^(2+) ions?

Standard oxidation potential of iron electrode is + 0.44 V. Calculate the potential of Fe, FeSO_4(0.1 M) at 25^@C .

Calculate electrode potential of Zn^(2+)(0.1M)//Zn"||"Cl^(-)(0.01)//Cl_(2), Pt E^(@)Zn^(2+)//Zn = -0.762V , E^(@) 1/2 Cl_(2)//Cl^(-) = + 1.36V

Calculate K_(c) for the reaction at 298 K Zn_((s))+Cu_((aq))^(+2)hArrZn _((aq))^(2+)+Cu_((s)) E _(Zn^(2+)//Zn)^(0)=-0.76V, E_(Cu^(2+)//Cu)^(0) =+0.34V.

E_("red")^(0) (Standard reduction potential ) of different half-cells are given E_(Cu^(+2)//Cu)^(0) = 0.34 V E_(Zn^(+2)//Zn)^(0) = -0.76 V , E_(Ag^(+) // Ag)^(0) = 0.80 V , E_(Mg^(2+) // Mg)^(0) = -2.37 V . In which cell DeltaG^(@) is most negative ?

The electrochemical cell shown below is a concentration cell. M|M^(2+) (saturated solution of a sparingly soluble salt, MX_2 || M^(2+) (0.001 mol dm^(-3) ) |M The emf of the cell depends on the difference in concentration of M^(2+) ions at the two electrode The emf of the cell at 298 is 0.059 V The value of DeltaG (kJ " mol"^(-1)) for the given cell is ( take 1F = 96500 C " mol"^(-1) )

Calculate the EMF of Zn//Zn^(2+)(0.1)"//"Cu^(2+)(0.1)//Cu E^(@) of Zn^(2+)//Zn = 0.762V , E^(@) of Cu^(2+)//Cu = +0.337V

VIKRAM PUBLICATION ( ANDHRA PUBLICATION)-ELECTROCHEMISTRY & CHEMICAL KINETICS-PROBLEMS
  1. The standard potentials of some electrodes are as follows. Arrange the...

    Text Solution

    |

  2. Calculate the emf of the cell at 25^(@)C Cr|Cr^(3+)(0.1M)||Fe ^(2+)(...

    Text Solution

    |

  3. Calculate the potential of a Zn -An^(2+) electrode in which the molari...

    Text Solution

    |

  4. Determine DeltaG^(0) for the button cell used in the watches. The cell...

    Text Solution

    |

  5. Calculate the emf of the cell consisting the following half cells Al...

    Text Solution

    |

  6. Determine the values of K(c) for the following reacton Ni((s))+2 Ag ...

    Text Solution

    |

  7. Calculate the potential of the half-cell containing 0.1 M K(2)Cr(2)O...

    Text Solution

    |

  8. Calculate K(c) for the reaction at 298 K Zn((s))+Cu((aq))^(+2)hArrZn...

    Text Solution

    |

  9. Calculate the emf of the cell at 298 K Sn((s))|Sn^(2+)(0.05M)||H((aq...

    Text Solution

    |

  10. Calculate the concentration of silver ions in the cell constructed by ...

    Text Solution

    |

  11. Calculate the emf of the cell with the cell reaction Ni ((s))+2Ag ^(...

    Text Solution

    |

  12. Cu^(2+)+2e^(-)hArrCu,E^(0)=+0.34V Ag^(+)+e^(-)hArr Ag, E^(0)=+0.80V ...

    Text Solution

    |

  13. The conductivity of 0.20M solution of KCl at 298 K is 0.0248S cm^(-1)....

    Text Solution

    |

  14. Calculate the degree of dissociation (alpha) of CH(3)COOH at 298K. ltb...

    Text Solution

    |

  15. A reaction is 50% completed in 2 hours and 75% conmpleted in 4 hours. ...

    Text Solution

    |

  16. A reaction has a half-life of 10 minutes. Calculate the rate constant ...

    Text Solution

    |

  17. In a first order ractin, the concentration of the reaction is reduced ...

    Text Solution

    |

  18. The rate constant for a zero order reaction in A is 0.0030 mol L^(-1)s...

    Text Solution

    |

  19. A first order decomposition reaction takes 40min. For 30% decompositio...

    Text Solution

    |

  20. Calculate the half-life of first order reaction whose rate constant is...

    Text Solution

    |