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Why does molar conductivity of a weak electrolyte increase steeply on dilution and for strong electrolyte increase slowly?

Why does molar conductivity of a weak electrolyte increase steeply on dilution and for strong electrolyte increase slowly?

Grade:12

2 Answers

Shivam Dimri
43 Points
8 years ago

for strong electrolyte the disscociation is constant for a wide range hence you get a straight line b/w conductivity and concentration

but for a weak electrolyte the disscociation constant is low for normal concentrations

but due to dilution this constant increases non-linearly hence molar limiting conductivity cannot be just obtained by extrapolating the graph, the number or ions per volume increases tremendously...

KS
34 Points
8 years ago

hey there,

Weak electrolytes donot completely dissociate in the solution but there is a very large increase in conductance with dilution nearly infinite dilution since the degree of ionization increases to a very large extent.

As the degree of ionization increase, there are more number of ions in the solution therefore leading to more transfer of electric charge thus the molar conductivity of a weak electrolyte increase steeply on dilution.

Hope you got it!

ThankYou.

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