Quiz 4 question 1 Vapor pressure gives the maximum partial pressure in the gas phase of a substance that exists A at equilibrium with its pure liquid B at equilibrium with its liquid dissolved in water 2 min 1 Quiz 4 question 2 A chemical is spilled This chemical is degraded following first order kinetics Its half life is A C 0 5C0 C0exp kt1 2 B C 0 5C0 C0 kt1 2 1 min 2 Quiz 4 question 3 WHEN WILL A CHEMICAL MOVE FROM WATER TO AIR A When the measured concentration in water is LESS than equilibrium concentration in water B When the measured concentration in water is MORE than equilibrium concentration in water C When the measured concentration in water is EQUAL TO equilibrium concentration in water 1 min 3 Quiz 4 question 4 What parameter describes distribution of a chemical between soil and water A Henry s law constant KH B Vapor Pressure P C Organic carbon water constant Koc D Water solubility 1 min 4 Quiz 4 question 5 A critical assumption for the use of Henry s law constant or vapor pressure or Koc is A Chemicals do not dissolve in water B Chemicals do not evaporate C Equilibrium 1 min 5 Quiz 4 question 6 Two soils are both contaminated with TCE Soil A has 1 organic matter foc 1 Soil B has 0 01 organic matter foc 0 01 Which soil retains more TCE A Soil A B Soil B C Cannot compare based on given information 1 min 6 Quiz 4 question 7 A organic chemical is released to a river Assume no degradation Which of the following equations will help you to find concentration of the chemical in river water Csoilcarbon A K oc Cw P B K H Cw 2 min Cbiota C BCF Cw D loading rate Qwater Cw Qsed Csed Qbiota Cbiota Qwater Cw Qsed Cw K oc Qbiota Cw BCF E All of the above 7 I feel prepared for exam problems on organic pollutants A B C D Strongly agree Agree Disagree Strongly disagree 8 Answers 1 2 3 4 5 6 7 A A B C C A E 9
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