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Question: Answered & Verified by Expert
In a galvanic cell, after running the cell for sometime, the concentration of the electrolyte is automatically raised to 3 m HCl. Molar conductivity of the 3 m HCl is about 240 S cm2mol-1 and limiting molar conductivity of HCl is about 420 S cm2mol-1 . If Kb of water is 0.52 K kg mol-1 , calculate the boiling point of the electrolyte at the end of the experiment.
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Options:
  • A 375.6 K
  • B 376.3 K
  • C 378.1 K
  • D 380.3 K
Solution:
1605 Upvotes Verified Answer
The correct answer is: 375.6 K
α=Molar conductivityLimiting molar conductivity=240420=1221

α=i-1n-1=i-12-1=1221

i=1221+1=3321

ΔTb=iKbm=3321×0.52×3=2.45K

Tb=Tbo+ΔTb=373.15+2.45=375.6K

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