A) 998
B) 1028
C) 1098
D) 1198
Correct Answer: D
Solution :
According to vant Hoffs solution equation \[\pi V=nRT\] or \[\pi V=\frac{w}{m}RT\] \[\pi \] (osmotic pressure) \[=600mm=\frac{600}{760}atm\] \[w=20\text{ }g;\text{ }R=0.0821\text{ }L\text{ }atm\text{ }mo{{l}^{-1}}\text{ }{{K}^{-1}}\] \[T=273+15=288\text{ }K\] \[V=500mL=0.5L\] \[m=\frac{wRT}{\pi V}\] \[=\frac{20\times 0.0821\times 288\times 760}{600\times 0.5}=1198.0\]You need to login to perform this action.
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