A forensic chemist is given a white solid that is suspected of being pure cocaine (C17H21NO4). She dissolves 1.22 g of the solid in 15.60 g of benzene and obtains the following graphs from a freezing point depression analysis. *ΔTf = KfCmi; Kf (benzene) = -5.12 ˚C/m
What is the experimental change in freezing point? *Use degC for ˚C units.
How many moles of solute are required to produce this drop in freezing temperature?
