A and B Thanks The classic Russian vodka is 40 percent by weight (80 proof), the

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A and B

Thanks

The classic Russian vodka is 40 percent by weight (80 proof), the number being attributed to the famous Russian chemist Dmitri Mendeleev (periodic table of elements). According to the Vodka Museum in St. Petersburg, Russia, Mendeleev thought that the perfect percentage to be 38, but since spirits in his time were taxed on their strength the percentage was rounded up to 40 to simplify the tax computation. It is not possible to obtain 100 % ethanol by simple fractional distillation, because a mixture containing at least 95.4% alcohol and 4.6% water becomes a constant boiling mixture (an azeotrope). To obtain 100% pure alcohol a small quantity of benzene is added and the mixture is then distilled. Absolute alcohol is obtained in the third fraction that distills over at 78.2 degree C. Because a small amount of the benzene used remains in the solution, the product of this process will cause extensive liver damage if consumed. Some graduate students decide to make "synthetic vodka" using 200 proof (100%) ethanol stolen from the chemistry department. Note: Stealing: bad. Also this method produces alcohol containing benzene, see previous paragraph. A better (and legal) method for obtaining cheep but nice vodka has been suggested: filtering cheep vodka with a Brita filter to remove impurities that cause bad smell, taste, and (possibly) hangovers. What volumes of ethanol and water would be used to create 1 kg of "synthetic vodka"? What is the total volume before mixing (V_ethanol + V_water) (Density ethanol: 0.79g/ml) Using the figure below, what would the actual volume of the mixture be?

Explanation / Answer

Answer:

a). The volume of ethanol and water is used to prepare 1 kg vodka is 900 ml ethanol and 100 ml water.

the total volume before mixting the two is 964 ml ethanol and 46 ml water.

b).   

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