Question

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

• A. 34.18 g of glucose per litre
• B. 44.18 g of glucose per litre
• C. 54.18 g of glucose per litre
• D. 64.18 g of glucose per litre

Answer 1

The correct option is C 54.18 g of glucose per litre

We have,

$\pi =C\ast R\ast T$

$7.65=C\ast 0.082\ast 310$

concentration = 0.3 M

$C=\frac{givenweight}{molecularweight\ast volume}$

$0.3=\frac{x}{180}$

so, amount of glucose used per litre = 54.18 g