Solutions Question 337
Question: The solution containing 4.0 g of a polyvinyl chloride polymer in 1 litre of dioxane was found to have an osmotic pressure $ 6.0\times {10^{-4}} $ atmosphere at 300K, the value of R used is 0.082 litre atmosphere $ mol{e^{-1}}{K^{-1}} $ . The molecular mass of the polymer was found to be
Options:
A) $ 3.0\times 10^{2} $
B) $ 1.6\times 10^{5} $
C) $ 5.6\times 10^{4} $
D) $ 6.4\times 10^{2} $
Show Answer
Answer:
Correct Answer: B
Solution:
$ \pi V=\frac{W}{m}RT $
$ \therefore 6\times {10^{-4}}\times 1=\frac{4}{m}\times 0.0821\times 300; $
$ m=1.64\times 10^{5}. $
