Home
Class 12
CHEMISTRY
A voltaic cell is set up at 25^(@)Cwith ...

A voltaic cell is set up at `25^(@)C`with the following half cells :
`Al^(3+)`(0.001 M) and `Ni^(2+)`(0.50 M)
Write the equation for the reaction when the cell generates the electric current. Also determine the cell potential (Given `E_(Ni^(2+)//Ni)^(@)=-0.25 V, E_(Al^(3+)//Al)^(@)=-1.66 V)`.

Text Solution

Verified by Experts

The correct Answer is:
`1.46V`
`Ni^(2+)+2e^(-)toNi,E_(Ni^(2+)//Ni)=0.25-(0.0591)/(2)"log"(1)/(0.50)=-0.259V`
`Al^(3)+3e^(-)toAl,E_(Al^(3+)//Al)=-1.66-(0.0591)/(3)"log"(1)/(10^(-3))=-1.719V`
For EMF to be +ve, oxidation should occur on Al-electrode. Cell reaction: `2Al+3Ni^(2+)to2Al^(3+)+3Ni`
`E_(cell)=-0.259+1.719V=1.46V`
Promotional Banner

Topper's Solved these Questions

  • ELECTROCHEMISTRY

    PRADEEP|Exercise Advanced Problem For Competitions|17 Videos

  • ELECTROCHEMISTRY

    PRADEEP|Exercise TEST YOUR GRIP (MUTIPLE CHOICE QUESTION)|20 Videos

  • ELECTROCHEMISTRY

    PRADEEP|Exercise Curiosity Question|5 Videos

  • D- AND F-BLOCK ELEMENTS

    PRADEEP|Exercise IMPORTANT QUESTIONS|30 Videos

  • GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

    PRADEEP|Exercise Curiosity Questions|2 Videos

Similar Questions

Explore conceptually related problems

(a) How many mole of mercury will be produced by electrolysing 1.0 MHg (NO_(3))_(2) solution with a current of 2.00 A for 3 hours? [Hg (NO_(3))_(2) = 200.6 g mol^(-1) ]. (b) A voltaic cell is set up at 25^(@) C with the following half-cells Alk^(3+) (0.001M) and Ni^(2+) (0.50M). Write an equation for the reaction that occurs when the cell generates an electric current and determine the cell potential. (Given : E_(Ni^(2+)//Ni)^(2)=- 0.25 V,E_(Al^(3+)//Al)^(@)= - 1.66V )

(a) What type of a cell is the lead storage battery ? Write the anode and the cathode reactions and the overall reaction occuring in a lead storage battery while operating . (b) A voltaic cell is set up at 25^(@)C with the half-cells , Al|Al^(3+) (0.001M) and Ni| Ni^(2+) (0.50 M) . Write the equation for the reaction that occurs when the cell generates an electric current and determine the cell potential. (Given : E_(Ni^(2+)|Ni)^(@) = -0.25 V , E_(Al^(3+)|Al)^(@) = -1.66V ).

A voltaic cell is set up at 25^(@)C with following half cells : Ag^(+)(0.001 M)|Ag and Cu^(2+)(0.10 M)|Cu What would be the voltage of this cell ? (E_(cell)^(@)=0.45 V)

(a) State the relationship amongst cell constant of a cell , resistance of the solution in the cell and conductivity of the solution . How is molar conductivity of solute related to conductivity of its solution ? (b) A voltanic cell is set up at 25^(@)C with the following half-cells : Al|Al^(3+) (0.001M) and Ni|Ni^(2+) (0.50M) Calculate the cell voltage [ E_(Ni^(2+)|Ni)^(@) = -0.25V , E_(Al^(3+) |Al)^(@) = -1.66 V ]

Calculate e.m.f. of the cell containing nickel and copper electrodes. Given that : E_(Ni^(2+)//Ni)^(@)=-0.25 V , E_(Cu^(2+)//Cu)^(@)=+0.34 V.

The following cell Al(s) | Al^(3+(aq, 0.001 M) || Cu^(2+)(aq, 0.10 M)| Cu(s) has a standard cell potential, E^(@) = 200V. What is the cell potential for this cell at the concentration given?

For a standard cell Zn(s)|Zn^(2+)(1 M)||Cu^(2+)(1 M)|Cu(s) Write the electrode reaction and cell reaction. Also find the e.m.f. of cell if ? E_(Zn^(2+)|Zn)^(@)=-0.76" V", E_(Cu^(2+)|Cu)^(@)=+0.34" V" .

Can 1M NiSO_(4) be stored in a veseel made up of copper? Given: E_(Ni^(2+)//Ni)^(@) = -1.20V and E_(Cu^(2+)//Cu)^(@) = 0.34V

PRADEEP-ELECTROCHEMISTRY-Problem for Practice
  1. A galvanic cell consists of a metallic zinc plate immersed in 0.1 M Zn...

    Text Solution

    |

  2. Calculate the standard electrode potential of Ni^(2+)/Ni electrode if ...

    Text Solution

    |

  3. A voltaic cell is set up at 25^(@)Cwith the following half cells : A...

    Text Solution

    |

  4. The measured e.m.f. at 25^(@)C for the cell reaction , Zn(S)+Cu^(2+)...

    Text Solution

    |

  5. Calculate the potential of the following cell reaction at 298 K Sn^(...

    Text Solution

    |

  6. Calculate the potential of a zinc-zinc ion electrode in which the zinc...

    Text Solution

    |

  7. (a) Calculate the electrode potential of silver electrode dipped in 0....

    Text Solution

    |

  8. Cu^(2+)+2e^(-)toCu,E^(@)=+0.34V,Ag^(+)+1e^(-)toAg,E^(@)=+0.80V (i) C...

    Text Solution

    |

  9. Calculate the potential for half cell containing 0.10 M K(2)Cr(2)O(7)(...

    Text Solution

    |

  10. Calculate the emf of the following cell at 298K: Fe(s)|Fe^(2+)(0.001...

    Text Solution

    |

  11. Calculate emf of the following cell at 25^(@)C: Fe|Fe^(2+)(0.001m)||...

    Text Solution

    |

  12. Calculate the e.m.f. of the following cell at 298K: 2Cr(s)+3Fe^(2+)(...

    Text Solution

    |

  13. Calculate the equilibrium cosntant for the reaction, Zn+Cd^(2+)hArrZn^...

    Text Solution

    |

  14. Calculate the equilibrium constant for the reaction at 298K. Zn(s) +...

    Text Solution

    |

  15. Calculate the equilibrium constant for the cell reaction : 4Br^(-)+O...

    Text Solution

    |

  16. Calculate the equilibrium constant for the reaction, 2Fe^(3+)+3I^(-)hA...

    Text Solution

    |

  17. Calculate the equilibrium constant for the reaction at 298K: NiO(2)+...

    Text Solution

    |

  18. Calculate the equilibrium constant for the following reaction at 298K....

    Text Solution

    |

  19. For the cell reaction, Mg|Mg^(2+) (aq.)||Ag^(+) (aq.)|Ag calculate...

    Text Solution

    |

  20. For the reaction N(2)(g)+3H(2)(g)hArr2NH(3)(g) at 298K, enthalpy and e...

    Text Solution

    |