1. Tardigrade
  2. Question
  3. Chemistry
  4. If 0.5 g of a solute (molar mass 100 g mol-1 ) in of solvent elevates the boiling point by 1K, the molar boiling point constant of the solvent is

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. If 0.5 g of a solute (molar mass 100 g $ mo{{l}^{-1}} $ ) in of solvent elevates the boiling point by 1K, the molar boiling point constant of the solvent is

CMC MedicalCMC Medical 2008

Solution:

By using the relation $ \Delta {{T}_{b}}=\frac{{{k}_{b}}\times {{w}_{B}}\times 1000}{{{M}_{B}}\times {{w}_{A}}} $ Here, $ \Delta {{T}_{b}}=1\,K, $ $ {{w}_{B}}=0.5g, $ $ {{w}_{A}}=25g $ $ {{M}_{B}}=100\,g\,\text{mo}{{\text{l}}^{-1}} $ $ \therefore $ $ 1=\frac{{{k}_{b}}\times 0.5\times 1000}{100\times 25} $ $ {{k}_{b}}=5 $