Kf (water) =1.86 K kg mol -1. The temperature at which ice begins to separate from a mixture of 10 mass % ethylene glycol is

Question

Kf (water) =1.86 K kg mol -1. The temperature at which ice begins to separate from a mixture of 10 mass % ethylene glycol is (A) -1.86° C (B) -3.72° C (C) -3.3° C (D) -3° C

Tardigrade Admin · Accepted Answer

Δ Tf=Kf × m=1.86((10/62) × (1000/90))=3.3° C ∴ Temparature at which ice begins to separate =3.3° C

Q. $K_{f}$ (water) $= 1.86 K k g m o l^{- 1}$ . The temperature at which ice begins to separate from a mixture of $10$ mass $%$ ethylene glycol is

$- 1.8 6^{\circ} C$

$- 3.7 2^{\circ} C$

$- 3. 3^{\circ} C$

$- 3^{\circ} C$

$Δ T_{f} = K_{f} \times m = 1.86 (\frac{10}{62} \times \frac{1000}{90}) = 3. 3^{\circ} C$
$∴$ Temparature at which ice begins to separate $= 3. 3^{\circ} C$

Q. Kf​ (water) =1.86Kkgmol−1. The temperature at which ice begins to separate from a mixture of 10 mass % ethylene glycol is

−1.86∘C

−3.72∘C

−3.3∘C

−3∘C