Home
Class 12
CHEMISTRY
If a reaction has an equilibrium consta...

If a reaction has an equilibrium constant `K lt 1`, is `E^(@)` positive or negative? What is the value of K, when `E^(@) = 0 V` ?

Text Solution

Verified by Experts

`E^(@) = ( 0.0591 )/( n ) log K `
If `K lt ` 1 ( say 0.01) ,
then `E^(@) = ( 0.0591 )/( n ) log 0.01 = ( - 2 xx 0.0591)/(n )`
`E^(@)` is thus negative.
If `E^(@) = 0V` , then K =1
Promotional Banner

Topper's Solved these Questions

  • ELECTROCHEMISTRY

    ARIHANT PUBLICATION|Exercise QUESTIONS FOR PRACTICE ( PART III ELECTROLCHEMICAL CELLS AND SERIES , NERNST EQUATIONS, BATTERIES AND CORROSION ) ( SHORT ANSWER TYPE I QUESTIONS) |14 Videos

  • ELECTROCHEMISTRY

    ARIHANT PUBLICATION|Exercise QUESTIONS FOR PRACTICE ( PART III ELECTROLCHEMICAL CELLS AND SERIES , NERNST EQUATIONS, BATTERIES AND CORROSION ) ( SHORT ANSWER TYPE Ii QUESTIONS) |8 Videos

  • ELECTROCHEMISTRY

    ARIHANT PUBLICATION|Exercise QUESTIONS FOR PRACTICE ( PART III ELECTROLCHEMICAL CELLS AND SERIES , NERNST EQUATIONS, BATTERIES AND CORROSION ) ( MULTIPLE CHOICE TYPE QUESTIONS) |4 Videos

  • D-BLOCK ELEMENTS

    ARIHANT PUBLICATION|Exercise Chapter practice (Long answer type questions)|2 Videos

  • ELEMENTS : NITROGEN FAMILY

    ARIHANT PUBLICATION|Exercise CHAPTER PRACTICE ( Long Answer Type Questions ) |11 Videos

Similar Questions

Explore conceptually related problems

The equilibrium constant for the reaction is 10 at 300K. What will be the value of triangleG^@ ?

If [[2,4],[k,6]] = 0 , what is the value of k ?

In an equilibrium reaction if DeltaG^o = 0 the equilibrium constant, K should be equal to:

If the E_("cell")^(@) for a given reaction has a negative value, then which of the following gives the correct relationships for the values of Delta G^(@) and K_(eq) ?

Calculate the standard cell potential of a galvanic cell in which the following reaction takes place 2Cr(s) + 3Cd^(2+) ( aq) rarr 2Cr^(3+) ( aq) + 3Cd(s) Calculate Delta_( r) G^(@) and equilibrium constant K of the above reaction at 25^(@)C . [Given, E_(Cr^(3+) //Cr)^(@) = - 0.74 V, E_(Cd^(2+)//Cd)^(@) = - 0.40V, 1F = 96500 C "mol"^(-1)]

If N_2 + 3H_2 hArr 2NH_3 has equilibrium constant K and 2N_2 + 6H_2 hArr 4NH_3 has equilibrium constant k', then k' =

If K_e of the reaction, 2HI rarr H_2+ I_2 is 0.25, the equilibrium constant of the reaction H_2+ I_2 rarr 2HI would be :

For a reaction the energy of activation is zero. What is the value of rate constant at 600 K if K= 9.2X10^6 S^( -1) at 480 K.

ARIHANT PUBLICATION-ELECTROCHEMISTRY-QUESTIONS FOR PRACTICE ( PART III ELECTROLCHEMICAL CELLS AND SERIES , NERNST EQUATIONS, BATTERIES AND CORROSION ) ( VERY SHORT ANSWER TYPE QUESTIONS)
  1. In the electrochemical cell, oxidation takes place at "………………..".

    Text Solution

    |

  2. The cations on reaching "………." gain electrons and from neutral atoms ,...

    Text Solution

    |

  3. What is the standard electrode potential of hydrogen electrode?

    Text Solution

    |

  4. Represent the galvanic cell in which the reaction, Zn(s) + Cu^(2+) (aq...

    Text Solution

    |

  5. Write the Nernst equation for electrode reaction. M^(n+) (aq) + n e^...

    Text Solution

    |

  6. Under what condition, E("cell") = 0 or Delta G = 0 ?

    Text Solution

    |

  7. Can E("cell")^(@) or Delta r G ^(@) for cell reaction ever be equal t...

    Text Solution

    |

  8. If a reaction has an equilibrium constant K lt 1, is E^(@) positive o...

    Text Solution

    |

  9. Why does a dry cell become dead after a long time even if it has not ...

    Text Solution

    |

  10. Unlike dry cell, the mercury cell has a constant cell potential throug...

    Text Solution

    |

  11. Write the cell reaction of a lead storage battery when it is discharg...

    Text Solution

    |

  12. Suggest two materials other than H2 that can be used as fuels in fuel ...

    Text Solution

    |

  13. What advantage do the fuel cells have over primary and secondary batte...

    Text Solution

    |

  14. Arrange the following metals in the order in which they displace each ...

    Text Solution

    |

  15. Rusting of iron is quicker in saline water than in ordinary water. Giv...

    Text Solution

    |

  16. Why does an alkaline medium inhibit the rusting of iron?

    Text Solution

    |

  17. Why rusting of iron pipe can be prevented by joining it with a piece o...

    Text Solution

    |