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The molar conductivities of NH(4)^(+) io...

The molar conductivities of `NH_(4)^(+)` ion and `Cl^(-)` ion are 73.5 mho `cm^(2) mol^(-1)` and 76.2 mho `cm^(2) mol^(-1)` respectively. The specific conductivity of 0.1 M `NH_(4)Cl` is `1.288 xx 10^(-2)` mho `cm^(-1)`. What is the dissociation constant of `NH_(4)Cl` ?

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