100 DIY Science: Illustrated Guide to Home Chemistry Experiments
RQEWEvI UESTIOnS
q 1 : Would you expect the density of the distilled ethanol solution to be lower or higher than the density of the original
ethanol solution? Why?
q: 2 Using values for the densities of various concentrations of ethanol and water that you obtain from the CRC Handbook of
Chemistry and Physics (CRC Press) or a reliable online source, estimate the ethanol concentrations in the original solution and the
distillate.
q: 3 A drugstore offers denatured ethanol in concentrations of 70%, 95%, and 99% by weight. The 70% and 95% solutions are
relatively inexpensive, but the 99% solution is very costly. Why?
q: 4 Distilling wine produces not colorless pure ethanol, as you might expect, but brandy, which is deeply colored and contains
complex flavors. Why?