Ask Questions, Get Answers

Want to ask us a question? Click here
Browse Questions
Home  >>  CBSE XII  >>  Chemistry  >>  Solutions
0 votes

A 5% solution (wt/volume) of cane sugar is isotonic with 0.877% (wt/volume) of urea solution.Find the molecular weight of urea,if molecular weight of sugar is 342.

$\begin{array}{1 1}60\\50\\40\\80\end{array} $

Can you answer this question?

1 Answer

0 votes
Isotonic solutions have same osmotic pressure at same temperature.
(or) $\large\frac{n_1}{V_1}$$ST =$$\large\frac{n_2}{V_2}$$ST$
(or) $\large\frac{n_1}{V_1}=\frac{n_2}{V_2}$
$\therefore C_1=C_2$
$\Rightarrow \large\frac{w_1}{m_1V_1}=\frac{w_2}{m_2V_2}$
$\therefore \large\frac{5}{342 \times \Large\frac{100}{1000}}=\frac{0.877}{m_2\times \Large\frac{100}{1000}}$
$\therefore m_2=\large\frac{0.877\times 342}{5}$
$\Rightarrow 59.99 \simeq 60$
answered Aug 6, 2014 by sreemathi.v
Ask Question
student study plans
JEE MAIN, CBSE, NEET Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App