Question

\(10\mathrm{g}\) of non-volatile solute is dissolved in \(180\mathrm{g}\) of \(\mathrm{H_2O}\) resulting in lowering of vapour pressure by \(0.5%\). Determine the boiling point of solution if \(K_b\) of water is \(0.52\mathrm{\ K\ kg\ mol^{-1}}\).

• A. \(100.01^\circ\mathrm{C}\)
• B. \(100.15^\circ\mathrm{C}\)
• C. \(100.23^\circ\mathrm{C}\)
• D. \(100.32^\circ\mathrm{C}\)

Hint:

Relative lowering of vapour pressure equals mole fraction of solute.

Answer 1

The Correct Option is B