Question

The osmotic pressure of blood is 7.65 atm. at 310 K. An aqueous solution of Glucose that will be isotonic with blood is what wt./vol?

• A. $5.41\%$
• B. $54.1\%$
• C. $3.5\%$
• D. $44.53\%$

Answer 1

The correct option is A $5.41\%$

Let concentration be $C$

$\pi =CRT$

$7.65=C\times 0.0821\times 310$

$C=\frac{7.65}{0.0821\times 310}=0.300577M$

Molar mass of glucose $\left(C_6{H}_{12}{O}_6\right)=180$

weight / volume conc $=0.300577\times 180g/L$

$=0.300577\times 180\times {10}^{-3}g/c{m}^3$

$=54.1\times {10}^{-3}g/c{m}^3$

$=5.41\%$