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ChemistryLiquid SolutionAbnormal Colligatiove PropertiesMedium2 minPYQ_2014
ChemistryMediumsingle choice

The observed osmotic pressure for a0.10 Msolution ofFe(NH4)2(SO4)2at25°Cis10.8 atm. The expected and experimental (observed) values of Van't Hoff factor 'i' will be respectively;(R = 0.082 L atm k- mol-1)

Options:

Answer:
C
Solution:

π = i C R T.

1 0 . 8 = i × 0 . 1 0 × 0 . 0 8 2 × 2 9 8

i = 1 0 . 8 0 . 1 0 × 0 . 0 8 2 × 2 9 8 = 1 0 . 8 2 . 4 4 3 6 = 1 0 . 8 2 . 4 4 3 8

= 4.42(experimental value)

FeSO 4 . NH 4 2 0 · 1 M SO 4 Fe aq 2 + 0 1 M + 2 SO 4 aq 2 - 0 · 2 M + 2 NH 4 aq + 0 · 2 M

i(expected) = 0 · 5 M 0 · 1 M = 5

Stream:JEESubject:ChemistryTopic:Liquid SolutionSubtopic:Abnormal Colligatiove Properties
2mℹ️ Source: PYQ_2014

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