Question

Solutions of two electrolytes ‘A’ and ‘B’ are diluted. The limiting molar conductivity of ‘B’ increases to a smaller extent while that of ‘A’ increases to a much larger extent comparatively. Which of the two is a strong electrolyte? Justify your answer.

Answer 1

Answer:

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Answer 2

Solutions of two electrolytes ‘A’ and ‘B’ are diluted. The limiting molar conductivity of ‘B’ increases to a smaller extent while that of ‘A’ increases to a much larger extent comparatively : B is a strong electrolyte .

Explanation:

Molar conductivity

• It refers to conductivity of entire solution .
• It is denoted by Λm.
• It is equal to :
• Λm= Κ/C
• Unit = Sm²/moles
• When an electrolyte is diluted , the conductivity of weak electrolyte increases more because in it the degree of dissociation increases whereas in case of strong electrolyte , degree of dissociation increases(ions per unit volume ) slowly on dilution .
• Now , in above asked question ,there is a marked increase in conductivity of A on dilution ,because initially it is a weak electrolyte and B is strong .