The freezing point depression constant (Kf) of benzene is 5.12 K kg mol-1. The freezing point depression for the solution of molality 0.078 m containing a non-electrolyte solute in benzene is (rounded off upto two decimal places):

Question

The freezing point depression constant (Kf) of benzene is 5.12 K kg mol-1. The freezing point depression for the solution of molality 0.078 m containing a non-electrolyte solute in benzene is (rounded off upto two decimal places): (A) 0.20 K (B) 0.80 K (C) 0.40 K (D) 0.60 K

Tardigrade Admin · Accepted Answer

Δ Tf=iKfm As solute is non-electrolyte, i = 1 Δ Tf=1× 5.12× 0.078 =0.40 K

Q. The freezing point depression constant $(K_{f})$ of benzene is $5.12 K k g m o l^{- 1}$ . The freezing point depression for the solution of molality 0.078 m containing a non-electrolyte solute in benzene is (rounded off upto two decimal places):

0.20 K

0.80 K

0.40 K

0.60 K

$Δ T_{f} = i K_{f} m$
As solute is non-electrolyte, $i = 1$
$Δ T_{f} = 1 \times 5.12 \times 0.078$
$= 0.40 K$

Q. The freezing point depression constant (Kf​) of benzene is 5.12Kkgmol−1. The freezing point depression for the solution of molality 0.078 m containing a non-electrolyte solute in benzene is (rounded off upto two decimal places):