Home
Class 12
CHEMISTRY
Write down Kohlrausch's law of independe...

Write down Kohlrausch's law of independent migration of ions. Find out the molar conductivity of ammonium hydroxide at infinite dilution `(Lambda_(m)^(@))` at 298K, given that `(Lambda_(m)^(@))` values for `NH_(4)Cl, NaCl and NaOH` are 149, 126 and `"248 S.cm"^(2)."mol"^(-1)` respectively at 298 K.

Text Solution

Verified by Experts

1st part : See article no. 3.14.
`"2nd part : "Lambda_(m)^(@)(NH_(4)OH)=lambda_(m)^(@)(NH_(4)^(+))+lambda_(m)^(@)(OH^(-))`
`=lambda_(m)^(@)(NH_(4)^(+))+lambda_(m)^(2)(Cl^(-))-lambda_(m)^(@)(Cl^(-))+lambda_(m)^(@)(Na^(+))-lambda_(m)^(@)(Na^(+))+lambda_(m)^(@)(OH^(-))`
`=Lambda_(m)^(@)(NH_(4)Cl)+Lambda_(m)^(@)(NaOH)-Lambda_(m)^(@)(NaCl)`
`=(149+248-126)" S.cm"^(2)."mol"^(-1)=271" S.cm"^(2)."mol"^(-1)`
Promotional Banner

Topper's Solved these Questions

  • ELECTROCHEMISTRY

    CHHAYA PUBLICATION|Exercise SOLVED WBCHSE SCANNER (2016)|5 Videos

  • ELECTROCHEMISTRY

    CHHAYA PUBLICATION|Exercise SOLVED WBCHSE SCANNER (2017)|6 Videos

  • ELECTROCHEMISTRY

    CHHAYA PUBLICATION|Exercise SOLVED WBCHSE SCANNER (2014)|1 Videos

  • D - AND F - BLOCK ELEMENTS

    CHHAYA PUBLICATION|Exercise PRACTICE SET 8 (Answer the following questions)|10 Videos

  • ENVIRONMENTAL CHEMISTRY

    CHHAYA PUBLICATION|Exercise PRACTICE SET 14(Answer the following questions)|6 Videos

Similar Questions

Explore conceptually related problems

Write down Kohlrausch's law of independent migration of ions. Find out the molar conductivity of ammonium hydroxide at infinite dilution (^^_m^@) at 298K, given that ^^_m^@ vales for NH_4Cl , NaCl and NaOH are 149, 126 and 248 S cm^2 mol^-1 respectively at 298K.

Lambda_(m)^(@) for NaCl, HCl and NaAc are 126.4, 425.9 and "91 S.cm"^(2)."mol"^(-1) respectively. Calculate Lambda^(@) for Hac.

Lambda_(m)^(@) of NaCl, HCl and CH_(3)COONa are 126.4, 425.9 and "91.0 S.cm"^(2)."mol"^(-1) respectively. Lambda_(m)^(@) for CH_(3)COOH will be -

Equivalent conductivities at infinite dilution (Lambda^(@)) of NH_(4)Cl, NaOH and NaCl are 130, 217.6 and "108.9 ohm"^(-1)."cm"^(2).g-equiv"^(-1) respectively at 25^(@)C . Calculate Lambda^(@) of NH_(4)OH at 25^(@)C

We have taken a saturated solution of AgBr, whose K_(sp) is 12xx10^(-14 . If 10^(-7)M" of "AgNO_(3) are added to 1 L of this solution, find the conductivity of the solution in terms of 10^(-7)"S.m"^(-1) units. Given that lambda^(@) values of the Ag^(+), Br^(-) and NO_(3)^(-) ions are 6xx10^(-3), 8xx10^(-3) and 7xx10^(-3)"S.m"^(2)."mol"^(-1) respectively.

At a given temperature, the molar conductivity at infinite dilution of the electrolyte A_(2)B and the molar ionic conductance of B^(2-) are x and y" ohm"^(-1)."cm"^(2)."mol"^(-1) respectively. Find the molar ionic conductance of A^(+) ion.

Equivalent conductivity at infinite dilution for sodium - potasium oxalate [(COO^(-))_(2)Na^(+)K^(+)] will be [given, molar conductivity of oxalate, K^(+) and Na^(+) ions at infinite dilution are 148.2, 50.1, "73.5 S.cm"^(2)."mol"^(-1) respectively]-

Equivalent conductivity at infinite dilution for sodium potassium oxalate [(COO^(-))_(2)Na^(+)K^(+)] will be [given, molar conductivity of oxalate, K^(+)and Na^(+) ions at infinite dilute are 148.2, 50.1, 73.5" S.cm"^(2)."mol"^(-1) . Respectively -

The molar conductivities of acetic acid at 298K at the molar concentration of 0.1 is 5.20 S cm^2 mol^(-1) . Calculate the degree of dissociation of acetic acid. Given that lamda_(H^+)^(infty) and lambda_(CH_3COO^-)^(infty) are 349.8 and 40.9 ohm^(-1) cm^2 mol^(-1) respectively.

At 25^(@) C, at infinite dilution, the molar conductivity of HCl, NaCl and CH_3COONa are 426.2, 126.5 and 91.0 ohm^(1)cm^2mol^(-1) respectively. Calculate molar conductivity of CH_3COOH at infinite dilution.