試題詳解

16. Calculate the freezing point of 2.0 g Al(NO₃)₃ in 30. g H₂O. (Assume complete dissociation and ideal solution.) (Note: Kf for water = 1.86 °C/m and Al(NO₃)₃ = 213 g mol⁻¹)
(A) -0.059 °C
(B) 2.33 °C
(C) -2.95 °C
(D) -1.75°C
(E) -2.33 °C