Home
Class 12
CHEMISTRY
The molar ionic conductances of Al(3+) ...

The molar ionic conductances of `Al(3+) and SO_(5)^(2-)` ions in an infinitely dilute solution of `Al_(2)(SO_(4))_(3)` are 189 and `"160 ohm"^(-1)."cm"^(2)."mol"^(-1),` respectively. Determine `Lambda^(@) and Lambda_(m)^(@)` of `Al_(2)(SO_(4))_(3)` solution.

Text Solution

Verified by Experts

`Lambda_(m)^(@)[Al_(2)(SO_(4))_(3)]=2lambda_(Al^(3+))^(@)+3lambda_(SO_(4)^(2-))^(@)`
`=(2xx189+3xx160)="858 ohm"^(-1)."cm"^(2)."mol"^(-1)`
Total valency (Z) of cations (or anions) per formula unit of `Al_(2)(SO_(4))_(3)=6`.
Total valency (Z) of cations (or anions) per formula unit of `Al_(2)(SO_(4))_(3)=6.`
Using the relation `Lambda_(m)^(@)=ZxxLambda^(@)`, we have,
`Lambda^(@)[Al_(2)(SO_(4))_(3)]=(1)/(6)xxLambda_(m)^(@)`
`="143 ohm"^(-1)."cm"^(2)."g-equiv"^(-1)`
Promotional Banner

Topper's Solved these Questions

  • ELECTROCHEMISTRY

    CHHAYA PUBLICATION|Exercise PROBLEM|7 Videos

  • ELECTROCHEMISTRY

    CHHAYA PUBLICATION|Exercise WARM UP EXERCISE|62 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

At 25^(@)C , if the molar ionic conductance of Ca^(2+) and Cl^(-) ions in an infinitely dilute soltuion of CaCl_(2) are "119 ohm"^(-1)."cm"^(2)."mol"^(-1) and "76.5 ohm"^(-1)."cm"^(2)."mol"^(-1) , respectively, then for the solution -

At infinite dilution of MgCl_(2) solution, lambda_(Mg^(2+))^(@)=53.06 and lambda_(Cl^(-))^(@)="76.34 ohm"^(-1)."cm"^(2)."g - equiv"^(-1) . Find Lambda_(eq)^(@) and Lambda_(m)^(@) of the solution.

NaOH solution is added to Al_2(SO_4)_3) solution?

The equivalent conductance of an infinitely dilute solution of Al_(2)(SO_(4))_(3) is Lambda^(@) . What is the value of Lambda_(m)^(@) for the solution?

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

The equivalent conductances at infinite dilution of HCl, CH_(3)COONa and NaCl are "426.16, 91.0 and 126.45 ohm"^(-1) cm^(2)" gm.equivalent"^(-1) respectively.. Calculate the lambda_(oo) of acetic acid.

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

If the equivalent ionic conductances of Al^(3+) and SO_(4)^(2-) ions are lambda_(Al^(3+))^(@) and lambda_(SO_(4)^(2-))^(@) , respectively, in an infinitely dilute solution of Al_(2)(SO_(4))_(3) , then the equivalent conductance of the solution would be -

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.