When concentration approaches zero, the molar conductivity is known as limiting molar conductivity and represented by

Question

When concentration approaches zero, the molar conductivity is known as limiting molar conductivity and represented by

When concentration approaches zero, the molar conductivity is known as limiting molar conductivity and represented by ∧⁰_M . Which of the following is correct order of molar conductiivity at infinite dilution ?

(a) LiCl > KCl > NaCl

(b) KCl > NaCl > LiCl

(c) LiCl > NaCl > KCl

(d) NaCl > KCl > LiCl

Monjur Alahi

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2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Correct option (b) KCl > NaCl > LiCl

Explanation:

Conductivity of ionic salt depends upon ionic mobility and ionic mobility depends upon size of ions in aqueous solution smaller hydrated ion has larger value of ionic mobility, hence higher value of molar conductivity.

Hydrated radii of Li, Na and K are as follows Li⁺ > Na⁺ > K⁺

\ Molar conductivity at infinite dilution is correct ordered in option (b)