Home
Class 12
CHEMISTRY
Conducitivity of 2.5 xx 10^(-4) M methon...

Conducitivity of `2.5 xx 10^(-4)` M methonic acid is `5.25 xx 10^(-5) S cm^(-1)`. Calculate the molar conductivity and degree of dissociation.
Given: `lambda^(@) (H^(+)) = 349.5 S cm^(2) mol^(-1)` and `lambda^(@) (HCOO^(-)) = 50.5 S cm^(2) mol^(-1)`

Text Solution

Verified by Experts

`Lambda_(HCOOH)^(@)= Lambda_(H^(+))^(@) + Lambda_(HCOO^(-))^(@) =349.5 + 50.5 = 400 S cm^(2) mol^(-1)`
`Lambda_(HCOOH) = K xx 1000 cm^(3) L^(-1) "molarity"^(-1)`
`=(5.25 xx 10^(-5) S cm^(-1) xx 1000 cm^(3) L^(-1))/(2.5 xx 10^(-4)"mol" L^(-1)) = 210 S cm^(2) mol^(-1)`
Degree of dissociation `(alpha) = Lambda_(m)/Lambda_(,)^(@) = 210/400 = 0.525` or `52.5%`
Promotional Banner

Topper's Solved these Questions

  • ELECTROCHEMISTRY

    U-LIKE SERIES|Exercise CASE BASED/SOURCE-BASED INTEGRATED QUESTIONS (LONG ANSWER QUESTIONS-II (5 MARKS EACH))|16 Videos

  • ELECTROCHEMISTRY

    U-LIKE SERIES|Exercise SELF ASSESSMENT TEST (SECTION A) MULTIPLE CHOICE QUESTIONS (CHOOSE THE CORRECT OPTION)|7 Videos

  • ELECTROCHEMISTRY

    U-LIKE SERIES|Exercise CASE BASED/SOURCE-BASED INTEGRATED QUESTIONS (SHORT ANSWER QUESTIONS (2 MARKS EACH))|47 Videos

  • COORDINATION COMPOUNDS

    U-LIKE SERIES|Exercise SELF ASSESSMENT TEST|7 Videos

  • EXAMINATION PAPER 2020

    U-LIKE SERIES|Exercise SECTION D|15 Videos

Similar Questions

Explore conceptually related problems

The conductivity of 0.001 "mol" L^(-1) solution of CH_(3)COOH " is " 3.905 xx 10^(-5) "S" cm^(-1) . Calculate its molar conductivity and degree of dissociation (alpha) . "Given" lambda^(@) (H^(+)) = 349.6 "S" cm^(2) "mol"^(-1) " and " lambda^(0) (CH_(3)COO^(-)) = 40.9 "S" cm^(2) "mol"^(-1) (b) Define electrochemical cell. What happens if external potential applied becomes greater than E_(cell)^(@) of electrochemical cell?

The conductivity of 0.001 mol L^(-1) solution of CH_(3)COOH is 3.905xx10^(-5)S cm^(-1) . Calculate its molar conductivity and degree of dissociation (alpha) . ("Given":lamda_((H^(+)))^(@)=349.65 S cm^(2)mol^(-1)andlamda^(@)(CH_(3)COO^(-))=40.9 D cm^(2)mol^(-1))

The conductivity of 0.20 mol L^(-1) solution of KCI is 2.48xx10^(-2)S cm^(-1) . Calculate its molar conductivity and degree of dissociation (alpha) . Given lambda_((K^(+)))^(@)=73.5 S cm^(-2)mol^(-1)and lambda_((CI^(-)))^(@)=76.5 mol^(-1) lambda_((K^(+)))^(@)=73.5 S cm^(-2)mol^(-1)and lambda_((CI^(-)))^(@)=76.5 mol^(-1)

U-LIKE SERIES-ELECTROCHEMISTRY -CASE BASED/SOURCE-BASED INTEGRATED QUESTIONS (LONG ANSWER QUESTIONS-I (3 MARKS EACH))
  1. Calcualte emf of the following at 25^(@) C Fe | Fe^(2+) (0.001) || H...

    Text Solution

    |

  2. Calculate the emf of the following cell at 25^(@) C Zn| Zn^(2+) (0.0...

    Text Solution

    |

  3. Conducitivity of 2.5 xx 10^(-4) M methonic acid is 5.25 xx 10^(-5) S c...

    Text Solution

    |

  4. (a) Calculate Delta(r)G^(@) for the reaction Mg(s) + Cu^(2+) (aq) to...

    Text Solution

    |

  5. State Kohlrausch law of independent migration of ions. Why does the co...

    Text Solution

    |

  6. Calcualte the emf of the following cell at 25^(@) C Ag(s) | Ag^(+) (...

    Text Solution

    |

  7. The electrical resistance of a column of 0.05 M NaOH solution of diame...

    Text Solution

    |

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

    Text Solution

    |

  9. For the cell Zn(s) | Zn^(2+)(2 M) ||Cu^(2+) (0.5 M) | Cu(s) (a) Wr...

    Text Solution

    |

  10. (a) Calculate the charge in coulombs required for oxidation of 2 moles...

    Text Solution

    |

  11. What is nickel-cadmium cell ? State its one merit and one demerit over...

    Text Solution

    |

  12. Give reason (a) Why does an alkaline medium inhibit the rusting of i...

    Text Solution

    |

  13. Consider the figure below and answer the following questions : (i...

    Text Solution

    |

  14. The following chemical reaction is occurring in an electrochemical cel...

    Text Solution

    |

  15. (a) A current of 1.50 amp was passed through an electrolytic cell cont...

    Text Solution

    |

  16. Calculate the emf and DeltaG of cell reaction for the following cell ...

    Text Solution

    |

  17. Calculate the standard cell potential of the galvanic cell in which th...

    Text Solution

    |

  18. a) Calculate the charge in coulombs required for the oxidation of 2 mo...

    Text Solution

    |

  19. Conductivity of 0.00241 M acetic acid is 7.896 xx 10^(-5) S cm^(-1). C...

    Text Solution

    |

  20. (i) Solutions of two electrolytes 'A' and 'B' are diluted. The limitin...

    Text Solution

    |