Question

What would be the freezing point of aqueous solution containing 17 g of $C_2{H}_{5}OH$ in 1000 g of water. $K_{fwater}=1.86K{m}^{-1}$.

• A. $-{0.69}^{\circ }C$
• B. $-{0.34}^{\circ }C$
• C. ${0.0}^{\circ }C$
• D. ${0.34}^{\circ }C$

Answer 1

The correct option is A $-{0.69}^{\circ }C$

$\Delta T_f=\frac{1000\times 1.86\times 17}{46\times 1000}={0.69}^{\circ }C{T}_f=0-0.69=-{0.69}^{\circ }C$