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Grade: 12

                        

Calculate vant Hoff factor i of the compound acetic acid in benzene if their Alfa=50%

2 years ago

Answers : (1)

dolly bhatia
200 Points
							
  • Acetic acid, weak acid dissociate weakly.. CH3COOH=(CH3COO-) +(H+)
  • Let Extent of dissociation be x. If we started with n moles of acetic acid then after dissociation CH3COOH=n(1-x), (CH3COO-)=(H+) =n(x)
    • So total moles =n(1+x)
    • i=observed colligative properties /calculated colligative properties…., and colligative properties are depends upon no. of moles so we can say:
    • i=observed no. Of moles /Calculated no. Of moles
    • That’s why in case of weak dissociation, we get i=n(1+x)/n that gives i=1+x…I>1.
2 years ago
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