the van' t Hoff factor of a species undergoing 50% association is 0.67. Then the no. of monomer units in the associated compound is
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Given : The Van't Hoff factor of a species undergoing 50% association is 0.67.
To find : The no of monomer units in the associated compound.
solution : n(monomer) ⇔polymer
1 - α α/n
⇒i = 1 - α + α/n
here Van't Hoff factor, i = 0.67 , α = 50% = 0.5
so, 0.67 = 1 - 0.5 + 0.5/n
⇒0.67 = 0.5 + 0.5/n
⇒0.17 = 0.5/n
⇒n = 0.5/0.17 ≈ 3
Therefore no of monomer units in the associated compound is 3.
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