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Limiting molar conductivity of NH(4)OH [...

Limiting molar conductivity of `NH_(4)OH` [i.e., `Lambda_(m)^(@)(NH_(4)OH)`] is equal to:

A

`overset(0)(wedge)_(m(NH_(4)Cl))+overset(0)(wedge)_(m(NaCl))-overset(0)(wedge)_(m(NaOH))`

B

`overset(0)(wedge)_(m(NaOH))+overset(0)(wedge)_(m(NaCl))-overset(0)(wedge)_(m(NH_(4)Cl))`

C

`overet(0)(wedge)_(m(NH_(4)OH))+overset(0)(wedge)_(m(NH_(4)Cl))-overset(0)(wedge)_(m(HCl))`

D

`overset(0)(wedge)_(m(NH_(4)Cl))+overset(0)(wedge)_(m(NaOH))-overset(0)(wedge)_(m(NaCl))`

Text Solution

Verified by Experts

The correct Answer is:
D
`(wedge)_(m(NH_(4)OH))=overset(0)(wedge)_(m(NH_(4)Cl))+overset(0)(wedge)_(m(NaOH))-overset(0)(wedge)_(M(NaCl))`
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Calculating The Degree of ionization: The molar conductance of an infinitely dilute solution NH_(4)Cl is 150 S cm^(2) mol^(-1) and the limiting ionic conductacnes of Cl^(-) and OH^(-) ions are 76 and 198 S cm^(2) mol^(-1) respectively. If the molar conductivity of a 0.01 M solution of NH_(4)OH is 9.6 S cm^(2) mol^(-1) , what will be its degree of ionization Strategy: At any concentration C , if alpha is the degree of ionization then it can be approximented to the ratio of molar conductivity Lambda_(m)^(c) at the concentration C to limiting molar conducting, Lambda_(m)^(0) . We are given Lambda_(m)^(c) but we need to find Lambda_(m)^(0) .

A: Molar conductivity of 0.1 M NH_(4)OH solution is less than that of 0.001 M NH_(4)OH solution. R: Dilution increases the degree of ionisation of NH_(4)OH

ERRORLESS -ELECTROCHEMISTRY-Ordinary Thinking Objective Questions (Conductor And conductance)
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  2. Which of the following expressions correctly represents the equivalent...

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  8. The units of equivalent conductivity are

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  10. The conductivity of a strong electrolyte:

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  11. Which of the following conducts electricity ?

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  13. Specific conductance of 0.1M nitric acid is 6.3xx10^(-2)ohm^(-1)cm^(-1...

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  14. The best conductor of electricity is

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  15. The conductance of a solution of an electrolyte is equal to that of it...

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  16. The electrical properties and their respective SI units are given belo...

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  17. On the basis of the given equivalent conductivity lamda(oo)(NH(4)Cl...

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