Calculate the freezing point of a soution made by dissolving 3.50g of potassium chloride (M = 74.55 g/mol) in 100.0 g of water. Assume ideal behavior for the solution; Kf = 1.86 degrees C/m.
a) -1.7 degrees C
b) -0.9 degrees C
c) 0.0 degrees C
d) 0.9 degrees C
e) 1.7 degrees C