A pharmaceutical preparation made with ethanol (C2H5OH) is contaminated with methanol
Chapter 13, Problem 13.134(choose chapter or problem)
A pharmaceutical preparation made with ethanol (C2H5OH) is contaminated with methanol (CH3OH). A sample of vapor above the liquid mixture contains a 97/1 mass ratio of C2H5OH to CH3OH. What is the mass ratio of these alcohols in the liquid? At the temperature of the liquid, the vapor pressures of C2H5OH and CH3OH are 60.5 torr and 126.0 torr, respectively. 13.135 Water treatment plants commonly use chlorination to destroy bacteria. A byproduct is chloroform (CHCl3), a suspected carcinogen, produced when HOCl, formed by reaction of Cl2 and water, reacts with dissolved organic matter. The United States, Canada, and the World Health Organization have set a limit of 100. ppb of CHCl3 in drinking water. Convert this concentration into molarity, molality, mole fraction, and mass percent.
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