Question

A solution is prepared by dissolving \(2\) gram of non-volatile solute in \(500\) mL solution at \(27^\circ\text{C}\). The osmotic pressure of the solution is \(0.82\) atm. The molar mass of the solute is:

• A. \(100\ \text{g mol}^{-1}\)
• B. \(120\ \text{g mol}^{-1}\)
• C. \(150\ \text{g mol}^{-1}\)
• D. \(180\ \text{g mol}^{-1}\)

Hint:

For osmotic pressure problems, always convert:
• Temperature into Kelvin
• Volume into liters A commonly used formula is: \[ M = \frac{wRT}{\pi V} \] which directly gives molar mass.

Answer 1

The Correct Option is A