Question

The average osmotic pressure of human blood is 7.8 bar at $37^{o}C$. What is the concentration of an aqueous $NaCl$ solution that could be used in the blood stream.

• A. $0.16mol/L$
• B. $0.32mol/L$
• C. $0.60mol/L$
• D. $0.45mol/L$

Answer 1

Answer: (B)

$0.32mol/L$

Answer 2

$\pi = CRT$; $C = \frac{\pi}{RT} = \frac{7.8}{\cdot 082 \times 310} = 0 \cdot 31mol/litre$