Home
Class 12
CHEMISTRY
Consider the cell : Pt|H(2)(p(1)atm)|H...

Consider the cell `:`
`Pt|H_(2)(p_(1)atm)|H^(o+)(x_(1)M) || H^(o+)(x_(2)M)|H_(2)(p_(2)atm)Pt`.
The cell reaction be spontaneous if

A

`p_(1)=p_(2)`

B

`p_(1)gtp_(2)`

C

`p_(2)gtp_(1)`

D

`p_(1)=1 atm`

Text Solution

Verified by Experts

The correct Answer is:
b
Cell is spontaneous when `p_(1)(` anode `)gtp_(2)(` cathode `)`
`E_(cell)=0.05[pH_(a)-pH_(c)+(1)/(2)log.((pH_(2))_(a))/((pH_(2))_(c))]`
`=0.059[0-0+(1)/(2)log.(p_(1))/(p_(2))]`
Thus, `E_(cell)gt0` if `p_(1)gtp_(2)`
Promotional Banner

Topper's Solved these Questions

  • ELECTROCHEMISTRY

    CENGAGE CHEMISTRY|Exercise Ex 3.2 (Objective)|26 Videos

  • ELECTROCHEMISTRY

    CENGAGE CHEMISTRY|Exercise Ex 3.3 (Objective)|10 Videos

  • ELECTROCHEMISTRY

    CENGAGE CHEMISTRY|Exercise Solved Examples(Electrolysis And Electrolytic Cells)|12 Videos

  • D AND F BLOCK ELEMENTS

    CENGAGE CHEMISTRY|Exercise Archives Subjective|29 Videos

  • GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF ELEMENTS

    CENGAGE CHEMISTRY|Exercise Archives (Subjective)|14 Videos

Similar Questions

Explore conceptually related problems

Pt(H_(2))(p_(1))|H^(o+)(1M)|(H_(2))(p_(2)),Pt cell reaction will be exergonic if

Pt | Cl_2 (P_2) |HCl (0.M) |Pt|Cl_2 (P_2) , cell reaction will be spontaneous if :

For the cell Pt_((s)), H_(2) (1 atm)|H^(+) (pH=2)||H^(+) (pH=3)|H_(2) (1atm),Pt The cell reaction is

For the concentration cell Pt(H_(2)-p_(1))|H^(+)(0.5M)|Pt(H_(2)-P_(2)) the cell reaction will be spontaneous if

Pt(Cl_(2))(p_(1))|HCl(0.1M)|(Cl_(2))(p_(2)),Pt cell reaction will be endergonic if

The pH of LHE in the following cell is : Pt, H_(2)(1atm)|H^(o+)(x M)||H^(o+)(0.1M)|H_(2)(0.1atm)Pt E_(cell)=0.295V .

The observed emf of the cell, Pt|H_(2) ("1 atm")|H^(+)(3xx10^(-4) M)||H^(+) (M_(1))|H_(2) ("1 atm")|Pt is 0.154 V. Calculate the value of M_(1) and pH of cathodic solution.

CENGAGE CHEMISTRY-ELECTROCHEMISTRY-Ex 3.1 (Objective)
  1. If all species are in their standard states, which of the following is...

    Text Solution

    |

  2. The standard EMF of a galvanic cell involving cell reaction with n=2 i...

    Text Solution

    |

  3. The correct order of reactivity of K,Mg,Zn and Cu with water according...

    Text Solution

    |

  4. For Pt(H(2))|H(2)O , reduction potential at 298 K and 1 atm is :

    Text Solution

    |

  5. Consider the cell : Pt|H(2)(p(1)atm)|H^(o+)(x(1)M) || H^(o+)(x(2)M)|...

    Text Solution

    |

  6. If E^(c-).(Fe^(3+)|Fe) and E^(c-).(Fe^(2+)|Fe) are =-0.36 V and -0.439...

    Text Solution

    |

  7. Pt(Cl(2))(p(1))|HCl(0.1M)|(Cl(2))(p(2)),Pt cell reaction will be ender...

    Text Solution

    |

  8. Consider the following cell with hydrogen electrodes at difference pre...

    Text Solution

    |

  9. Consider the following cell reaction Zn +2Ag^(o+)rarr Zn ^(2+)+2Ag....

    Text Solution

    |

  10. The standard reduction potentials of three metals A,B, and C are +0.5 ...

    Text Solution

    |

  11. Calculate the maximum work that can be obtained from the decimolar Dan...

    Text Solution

    |

  12. Stronger the oxidizing agent, greater is the

    Text Solution

    |

  13. Consider the cell Ag(s)|AgBr(s)Br^(c-)(aq)||AgCl(s),Cl^(c-)(aq)|Ag(s) ...

    Text Solution

    |

  14. The pH of LHE in the following cell is : Pt, H(2)(1atm)|H^(o+)(x M)...

    Text Solution

    |

  15. At what concentration of [overset(c-)(O)H] does the following half rea...

    Text Solution

    |

  16. If hydrogen electrodes dipped in two solutions of pH=3 and pH=6 are co...

    Text Solution

    |

  17. Consider the cell reaction : Mg(s)+Cu^(2+)(aq) rarr Cu(s) +Mg^(2+)(a...

    Text Solution

    |

  18. E^(c-).(red) of different half cell are given as : E^(c-).(Cu^(2+)|C...

    Text Solution

    |

  19. For the reaction : A+2B^(3+) rarr 2B^(2+)+A^(2+) E^(0) of the give...

    Text Solution

    |

  20. Excess of solid AgCl is added to a 0.1 M solution of Br^(c-) ions. E^(...

    Text Solution

    |