Home
Class 12
CHEMISTRY
The standard oxidation potential for the...

The standard oxidation potential for the half-cell
`NO_(2)^(-)(g)+H_(2)OtoNO_(3)^(-)(aq)+2H^(+)(aq)+2e` is `-0.78V`.
Calculate the reduction in 9 molar `H^(+)` assuming all other species at unit concentration. What will be the reduction potential in neutral medium?

Text Solution

Verified by Experts

The correct Answer is:
`0.836"volt", 1.1937"volt"`
`E_("oxidation")=-0.78-(0.0591)/(2)log9^(2)=-0.78-(0.0591)/(2)xx2xxlog9=-0.835"volt"`
`E_("reduction")=-E_("oxidation")=0.836"volt"`
In neutral medium
`E_("Oxidation")=-0.78-(0.0591)/(2)log(10^(-7))^(2)=-1.1937"volt"`
Promotional Banner

Topper's Solved these Questions

  • ELECTROCHEMISRY

    RESONANCE|Exercise Assertion Reasoning|11 Videos

  • ELECTROCHEMISRY

    RESONANCE|Exercise Subjective Questions|14 Videos

  • ELECTROCHEMISRY

    RESONANCE|Exercise Board Level Exercise|20 Videos

  • ELECTRO CHEMISTRY

    RESONANCE|Exercise PHYSICAL CHEMITRY (ELECTROCHEMISTRY)|53 Videos

  • EQUIVALENT CONCEPT & TITRATIONS

    RESONANCE|Exercise Part -IV|22 Videos

Similar Questions

Explore conceptually related problems

The standard reduction potential for the half-cell, NO_(3(aq.))^(-)+2H_((aq.))^(+)+e^(-)rarrNO_(2(g))+2H_(2)O is 0.78V . (i) Calculate the reduction potential in 8M H^(+) . (ii) What will be the reduction potential of the half-cell in a neutral solution. Assume all the other species to be at unit concentration

The standard reduction potential for the half cell : NO_(3)^(c-)(aq)+2H^(c-) +e^(-) rarr NO_(2)(g)+H_(2)O is 0.78V . a. Calculate the reduction potential in 8M H^(o+) . b. What will be the reduction potential of the half cell in a neutral solution ? Assume all the other species to be at unit concentration.

The standard reduction potential of the reaction H_(2)O+e^(-) rarr 1/2 H_(2) +OH , at 298 K, is

Which has maximum potential for the half-cell reaction : 2H^(+)2e^(-) rarr H_(2)(g)

The standard reduction potentials of two half cells Al^(3+) (aq) | Al and Mg^(2+)(aq) | Mg are -1.66V and -2.36V respectively. Calculate the standard cell potential. Write the cell reactions also.

Observe the following reaction, 2NO_(2)(g) + 2OH^(-)(aq) to NO_(3)^(-)(aq) + H_(2)O (l) + NO_(2)^(-) (aq) in this reaction,

The standard reduction potential at 25^(@)C of the reaction 2H_(2)O+2e^(-)hArrH_(2)+2overset(Θ)(O)H is -0.8277V . Calculate the equilibrium constant for the reaction. 2H_(2)OhArrH_(3)O^(o+)+overset(Θ)(O)H at 25^(@)C .

The standard reduction potential for H^(+)(aq) is 0.00v. What is the reduction potential for a 1 xx 10^(-3) M HCl solution?

The standard potential of the following cell is 0.23 V at 15^(@)C and 0.21V at 35^(@)C . Pt|H_(2) |HCl(aq) |Agcl (s)|g(s) (i) write the cell reaction . (ii) Calculate DeltaH^(@) and DeltaS^(@) for the cell reaction by assuming that these quantities remain unchanged in the range 15^(@)C to 35^(@)C . (iii) calculate the solubility of AgCl in water at 25^(@)C . Give , the standard reduction potential of the (Ag^(+)(aq) //Ag(s) is 0.80 V at 25^(@) C .

RESONANCE-ELECTROCHEMISRY-Exercise
  1. Write cell reaction of the following cells: (a). Pt|Fe^(2+),Fe^(3+)|...

    Text Solution

    |

  2. Calculat ethe oxidation potential of a hydrogen electrode at pH=1(T=29...

    Text Solution

    |

  3. The standard oxidation potential for the half-cell NO(2)^(-)(g)+H(2)...

    Text Solution

    |

  4. Calculate the electrode potential at 25^(@)C of Cr^(3+),Cr(2)O(7)^(2-)...

    Text Solution

    |

  5. The standard reduction potential for Cu^(2+)//Cu is +0.34V. Calculate ...

    Text Solution

    |

  6. The EMF of the cell M|M^(n+) (0.02 M) | H^(+) (1 M) | H(2)(g) (1 atm),...

    Text Solution

    |

  7. Consider the following electrochemical cell. (a). Write a balanced n...

    Text Solution

    |

  8. An electrochemical cell is constructed with an open switch as shown be...

    Text Solution

    |

  9. Equinormal solutions of two weak acids HA(pK(a)=3) and HB(pK(a)=5) are...

    Text Solution

    |

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

    Text Solution

    |

  11. NO(3)^(-)toNO(2) (acid medium) E^(0)=0.790V NO(3)^(-)toNH(3)OH^(+) (...

    Text Solution

    |

  12. The standard oxidation potential of Zn referred to SHE is 0.76 V and t...

    Text Solution

    |

  13. The emf of the cell Ag|AgI|CI(0.05M)||AgNO(3)(0.05M)|Ag is 0.79 V. Cal...

    Text Solution

    |

  14. The cell Pt, H(2)(1atm)|H^(+)(pH=x)|| normal calomel electrode has an ...

    Text Solution

    |

  15. The EMF of the standard weston cadmium cell Cd(12.5%) in Hg|3CdSO(4)...

    Text Solution

    |

  16. triangleH for the reactio Ag(s)+(1)/(2)Hg(2)Cl(2)(s)toAgCo(s)+Hg(l) is...

    Text Solution

    |

  17. The standard electromitive force of the cell Fe|Fe^(2+)(aq)||Cd^(2+)...

    Text Solution

    |

  18. The voltage of a certain cell has standard potential at 25^(@)C and 20...

    Text Solution

    |

  19. Find the number of electrons involved in the electro-deposition of 63....

    Text Solution

    |

  20. A current 0.5 ampere when passed through AgNO(3) solution for 193 sec....

    Text Solution

    |