1. Tardigrade
  2. Question
  3. Chemistry
  4. Molal depression constant for a solvent is 4.0 kg mol-1. The depression in the freezing point of the solvent for 0.03 mol kg-1 solution of K2SO4 is: (Assume complete dissociation of the electrolyte)

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. Molal depression constant for a solvent is $4.0\, kg\, mol^{-1}$. The depression in the freezing point of the solvent for $0.03\, mol\, kg^{-1}$ solution of $K_2SO_4$ is : (Assume complete dissociation of the electrolyte)

JEE MainJEE Main 2019Solutions

Solution:

$K_f$ = $4\, K-kg/mol$
$m = 0.03\, mol/kg$
$i = 3$
$\Delta T_f = iK_f \times m$
$ \Delta T_f = 3 \times 4 \times 0.03 = 0.3 6K$