In a current investigation, you are asked to help identify a white powdery subst
ID: 993138 • Letter: I
Question
In a current investigation, you are asked to help identify a white powdery substance that is suspected to be pure cocaine (C17H21NO4) but could also just be vitamin C (C6H8O6). You prepare a solution by dissolving 14.0 mg of the unknown in ethanol (C2H5OH) and dilute it up to 0.250 mL. You then conduct experiments with a pycnometer and a computer-controlled Lasany LMP-DS with 0.1 readability. Then you remember that vitamin C should be acidic. Desperate for results, you secretly tap your wetted finger into the remaining powder and taste it.
The lab report shows that:
(a) The density of the solution is 0.80 g/mL
(b) Boiling point of the solution is 78.8oC
How did you figure out from your results whether the unknown substance is cocain or vitamin C?
Extra information:
Explanation / Answer
the density and de boiling poing are the same of the pure ethanol so i can think than the sustance is vitamin C because the solubilitey of cocaine is better than the C vitamin in ethanol