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Which out of the following is a correct equation to show change in molar conductivity with respect to concentration for a weak electrolyte, if the symbols carry their usual meaning :

Options

  1. A( _ m - _ m ^0+ AC ^ 1 2 =0 )
  2. B( _m^2 C - K _ a _ m ^ 2 + K _ a _ m _ m =0 )
  3. C( ^2 _m C + K _ a _ m ^ 2 - K _ a _ m _ m ^ =0 )
  4. D( _ m - _ m ^ - AC ^ 1 2 =0 )

Correct answer

B. ( _m^2 C - K _ a _ m ^ 2 + K _ a _ m _ m =0 )

Step-by-step solution

aligned & HA ( aq ) H ⁺( aq )+ A ⁻( aq ) & K _ a = ^2 C 1- & ^2 C + K _ a - K _ a =0 & ( _ m _ m ^ )^2 C + K _ a _ m _ m ^ - K _ a =0 & _ m ^2 C + K _ a _ m _ m ^ - K _ a ( _ m ^ )^2=0 aligned

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