Home
Class 12
CHEMISTRY
Molar conductance of 1M solution of weak...

Molar conductance of `1M` solution of weak acid `HA` is `20 ohm^(-1) cm^(2) mol^(-1)`. Find `%` dissocation of `HA`:
`((^^_(m)^(o)(H^(+)) =350 S cm^(2) mol^(-1)),(^^_(m)^(o)(A^(-)) =50 S cm^(2) mol^(-1)))`

Text Solution

Verified by Experts

The correct Answer is:
5

`^^_(m)^(o) (HA) = 350 +50 = 400`
`alpha =(^^_(m)^(C))/(^^_(m)^(o)) xx 100 = (20)/(400) xx100 = 5%`
Promotional Banner

Topper's Solved these Questions

  • ELECTROCHEMISTRY

    ALLEN|Exercise Part (II) EXERCISE-01|44 Videos
  • ELECTROCHEMISTRY

    ALLEN|Exercise EXERCISE-02|36 Videos
  • ELECTROCHEMISTRY

    ALLEN|Exercise COMPREHENSION TYPE|18 Videos
  • CHEMISTRY AT A GLANCE

    ALLEN|Exercise ORGANIC CHEMISTRY|483 Videos
  • HYDROCARBON

    ALLEN|Exercise MCQ|15 Videos

Similar Questions

Explore conceptually related problems

The conductivity of 0.2M methanoic acid is 8Sm^(-1) . Then, degree of dissociation for methanoic acid is: [Given : lambda_((H^(+)))^(@)=350 Scm^(2)"mol"^(-1),lambda_(HCOO^(-))^(@)=50 Scm^(2) "mol"^(-1) ]

Calculate degree of dissocation of 0.02 M acetic acid at 298K. Given that Lamda_(m) (CH_(3)COOH)= 17.37 S cm^(2) mol^(-1), lamda_(m)^(@) (H^(+)) = 345.8 S cm^(2) mol^(-1), lamda_(m)^(@) (CH_(3)COO^(-)) = 40.2S cm^(2) mol^(-1)

Calculate the molar conductivity of a solution of MgCl_(2) at infinte dilution given that the molar ionic conductivities of lambda^(@) (Mg^(2+)) = 106.1 S cm^(2) mol^(-1) and lambda^(@) (Cl^(-)) = 76.3 S cm^(2) mol^(-1)

Calculate the degree of dissociation (alpha) of acetic acid if its molar conductivity (^^_(m)) is 39.05 S cm^(2) mol^(-1) Given lamda^(@) (H^(+)) = 349.6 cm^(2) mol^(-1) and lamda^(2) (CH_(3)COO^(-)) = 40.9 S cm^(2) mol^(-1)

Molar conductivity of aqueous solution of HA is 200 S cm^(2) "mol"^(-1) , pH of this solution is 4. Calculate the value of pK_(a) (HA) at 25^(@) C Given: wedge_(M)^(infty) (NaA) = 100 S cm^(2) mol^(-1), wedge_(M)^(infty)(HCl)= 425 Scm^(2) "mol"^(-1) , wedge_(M)^(infty)(NaCl) = 125 Scm^(2)"mol"^(-1) .

The molar conductivity of 0.007M acetic acid is 20Scm^2mol^(-1) . What is the dissociaion constant of acetic acid? choose the correct option. [^^_(H^+)^@= 350Scm^2mol^(-1) ^^_(CH_3COO^-)^@= 50Scm^2mol^(-1)]

ALLEN-ELECTROCHEMISTRY-INTEGER TYPE
  1. How much charge is present on 1 mole of Cu^(+2) ion in faraday. (1 Far...

    Text Solution

    |

  2. Total charge in faraday present in 54 gm of AI^(3+) ion.

    Text Solution

    |

  3. For an element 'X' the process of oxidation is: X(@)O(4)^(-2) rarr N...

    Text Solution

    |

  4. Consider a Galvenic cell, Zn(s) |Zn^(2+) (0.1M) ||Cu^(2+) (0.1M)|Cu(...

    Text Solution

    |

  5. How much charge (in F) must flow through solution during electrolysis ...

    Text Solution

    |

  6. Emf of a cell corresponding to the reaction:- Zn(s) +2H^(+) (aq) rar...

    Text Solution

    |

  7. A disposable galvanic cell Zn|Zn^(2+)||Sn^(2+)|SN is produced using 1....

    Text Solution

    |

  8. The specific conductance (k)of a 0.1M NaOH solution is 0.0221 S cm^(-1...

    Text Solution

    |

  9. For any sparingly soluble salt [M(NH(3))(4)Br(2)] H(2)PO(2) Given: l...

    Text Solution

    |

  10. An alloy of Pb-Ag weighing 54 mg was dissolved in desired amount of HN...

    Text Solution

    |

  11. A solution contains A^(+) and B^(+) in such a concentration that both ...

    Text Solution

    |

  12. An equeous solution of Na(2)SO(4) was electrolysed for 10 min. 82 ml o...

    Text Solution

    |

  13. At 298K the standard free energy of formation of H(2)O(l) is -256.5 kJ...

    Text Solution

    |

  14. Suppose the equilibrium constant for the reaction, 3M^(3+) rarr 2M^(...

    Text Solution

    |

  15. When a metal chloride MCI is dissolced in a large excess of ammonia, p...

    Text Solution

    |

  16. Molar conductance of 1M solution of weak acid HA is 20 ohm^(-1) cm^(2)...

    Text Solution

    |

  17. While the discharging of a lead storage battery following reaction tak...

    Text Solution

    |

  18. Conductivity of an aqueous solution of 0.1M HX (a weak mono-protic aci...

    Text Solution

    |