A) 34.2
B) 171.2
C) 68.4
D) 136.8
Correct Answer: C
Solution :
[c] Isotonic solutions are the solutions having same osmotic pressure. |
Applying Van't Hoff equation |
\[\pi V=nST\] |
\[\pi =cST\] |
Osmotic pressure of 5% cane sugar solution |
\[({{\pi }_{1}})\,C\times S\times T=\frac{50\,g/L}{342}\times 0.0821\times T\] |
Osmotic pressure of 1% solution of substance \[x\,({{\pi }_{2}})\] |
\[=\frac{10g/L}{M}\times 0.0821\times T\] |
Both are isotonic |
So, \[{{\pi }_{1}}={{\pi }_{2}}\] |
or \[\frac{50}{342}\times 0.0821\times T=\frac{10}{M}\times 0.0821\times T\] |
\[\therefore \] \[M\,(mol.\,wt.\,of\,X)=\frac{342}{5}=68.4\] |
You need to login to perform this action.
You will be redirected in
3 sec