1.

Degree of dissociation of pure water is 1.9xx10^(-9). Molar ionic conductances of H^(+) and OH^(-) ions at infinite diluton are 200 S cm^(2)mol^(-1) and 250" S "cm^(2)mol^(-1) respectively. Molar conductance of water is

Answer»

`3.8xx10^(-7)" S "cm^(2)MOL^(-1)`
`5.7xx10^(-7)" S "cm^(2)mol^(-1)`
`9.5xx10^(-7)" S "cm^(2)mol^(-1)`
`1.045xx10^(-6)" S "cm^(2)mol^(-1)`

Solution :Degree of dissociation `(alpha)=(wedge_(m)^(c))/(wedge_(m)^(0))`
`wedge_(m)^(c)=alphaxxwedge_(m)^(0)=(1.9xx10^(-9))xx(200+350)" S "cm^(2)mol^(-1)`
`=1.9xx550xx10^(-9)=1.045xx10^(-6)" S "cm^(2)mol^(-1)`


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