If the molar conductivity ( _ m ) of a 0.050 ~mol ~L ^ -1 solution of a monobasic weak acid is 90 ~S ~cm ^2 ~mol ^ -1 , its extent (degree) of dissociation will be [Assume _ + ^ =349.6 ~S ~cm ^2 ~mol ^ -1 and . _ - ^ =50.4 ~S ~cm ^2 ~mol ^ -1 . ]

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Quantrex Academy · Accepted Answer

Correct answer: C. 0.225

aligned & Degree of dissociation ( )= _m _m^ \ & aligned _ m ^ & = _ + ^ + _ - ^ \ & =349.6+50.4=400 Scm ^2 ~mol ^ -1 \ & = _ m _ m ^ = 90 400 =0.225 aligned aligned

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