A solution is made by dissolving 20 g of a substance in 500 mL of water. Its osmotic pressure was found to be 600 mm of Hg at 15 °C. Find the molecular weight of the substance.

Question

A solution is made by dissolving 20 g of a substance in 500 mL of water. Its osmotic pressure was found to be 600 mm of Hg at 15 °C. Find the molecular weight of the substance. (A) 1198 (B) 500 (C) 1200 (D) 1000

Tardigrade Admin · Accepted Answer

M = (WBRT/π V) = (20 ×0.0812 × 288 × 1000/(600/760)× 500) = 1198

Q. $A$ solution is made by dissolving $20 g$ of a substance in $500 m L$ of water. Its osmotic pressure was found to be $600 mm$ of $H g$ at $15^{°} C$ . Find the molecular weight of the substance.

$1198$

$500$

$1200$

$1000$

$M = \frac{W _{B} RT}{πV}$
$= \frac{20 \times 0.0812 \times 288 \times 1000}{( 600/760 ) \times 500} = 1198$

Q. A solution is made by dissolving 20g of a substance in 500mL of water. Its osmotic pressure was found to be 600mm of Hg at 15°C. Find the molecular weight of the substance.

1198

500

1200

1000