What will be the freezing point of a 0.5 m KCl solution? The molal freezing point constant of water is 1.86 °C m-1.

Question

What will be the freezing point of a 0.5 m KCl solution? The molal freezing point constant of water is 1.86 °C m-1. (A) - 1.86°C (B) -0.372°C (C) - 3.2°C (D) 0°C

Tardigrade Admin · Accepted Answer

Δ Tf = iKf × m = 2 × 1.86 × 0.5 = 1.86 °C Tf = T°f - Δ Tf = 0-1.86 =- 1.86 °C

Q. What will be the freezing point of a $0.5 m K Cl$ solution? The molal freezing point constant of water is $1.86^{°} C m^{- 1}$ .

$- 1.8 6^{°} C$

$- 0.37 2^{°} C$

$- 3. 2^{°} C$

$0^{°} C$

$Δ T_{f} = i K_{f} \times m$
$= 2 \times 1.86 \times 0.5 = 1.86^{\circ} C$
$T_{f} = T_{f}^{\circ} - Δ T_{f} = 0 - 1.86$
$= - 1.86^{\circ} C$

Q. What will be the freezing point of a 0.5mKCl solution? The molal freezing point constant of water is 1.86°Cm−1.

−1.86°C

−0.372°C

−3.2°C

0°C