Question

The osmotic pressure of blood is 7.65 atm at ${37}^{o}C$. How much glucose should be used per litre for an intravenous injection such that it has same osmotic pressure as blood?

• A. $5.418$ g/lit
• B. $0.27$ g/lit
• C. $541$ g/lit
• D. $54.00$ g/lit

Answer 1

Answer: (D)

$54.00$ g/lit

$\pi =MRT$

$7.65=M\times 0.0821\times 310$

$\Rightarrow M=0.3M$

Again,

$\frac{\omega }{M.\omega t}\times \frac{1}{V\left(lit\right)}=0.300$

$\frac{\omega }{180}\times 1=0.300$

$\omega =180\times 0.3$

$\omega =54g$