Chemistry Practice Problems Freezing Point Depression Practice Problems Solution: A mysterious white powder could be powdered sugar ...

⚠️Our tutors found the solution shown to be helpful for the problem you're searching for. We don't have the exact solution yet.

Solution: A mysterious white powder could be powdered sugar (C12H22O11), cocaine (C17H21NO4), codeine (C18H21NO3), norfenefrine (C8H11NO2), or fructose (C6H12O6). When 82 mg of the powder is dissolved in 1.50 mL of ethanol (d = 0.789 g/cm3, normal freezing point −114.6 oC, Kf = 1.99 oC/m), the freezing point is lowered to −115.5 oC. What is the identity of the white powder?

Problem

A mysterious white powder could be powdered sugar (C12H22O11), cocaine (C17H21NO4), codeine (C18H21NO3), norfenefrine (C8H11NO2), or fructose (C6H12O6). When 82 mg of the powder is dissolved in 1.50 mL of ethanol (d = 0.789 g/cm3, normal freezing point −114.6 oC, Kf = 1.99 oC/m), the freezing point is lowered to −115.5 oC. What is the identity of the white powder?