Chemistry (Environmental Engineering) 7. (5 points) Rank the chemicals in Table

Question

Chemistry (Environmental Engineering)

7. (5 points) Rank the chemicals in Table 12.3d in the order of most to least hydrophobic (1 most, 4 least) Table 12.3d Names, Structures, and Properties of Additional organic Compounds Commonly Found at Contaminated Sites. Structures Include PCBs, Explosives, Gasoline Additives, and Insecticides Henry's la w Compound name Molecular constant (acronym) Structure weight (unitless) Kow (°C) Aroclors 1254 0.155 6.03 n.a. n a Dichlorodiphenyltrichlorethane 354.5 3.315 x 10 4 6.19 25 (p,p'-DDT) CI Methyl ethyl ketone (MEK) CH CH 72.1 1.81 x 10-3 0.256 20 CH 2,4,6-Trinitrotoluene (TNT) 227.13 NO 8.6 x 10-7 1.6 20 NO "n.a.- not applicable, as Aroclors contain a mixture of PCBs, not just a single compound

Explanation / Answer

Hydrophobicity mean hate to water generally we call not solubility in water

DDT is not soluble in water

TNT soluble only 100-200 mg /Liter

and MEK 20%

so order to most to least hydrophobic is as DDT > TNT >MEK

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