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Question 1. An environmental scientist isolates a pollutant (compound X) from a factory’s effluent stream and dissolves...

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Chemistry

Question 1.

An environmental scientist isolates a pollutant (compound X)from a factory’s effluent stream and dissolves it in water.Experiments are then conducted using liquid – liquid extraction tooptimize its extraction. Using diethyl ether as the extractingphase, the following distribution ratios, D, are calculated as afunction of pH:

pH

2

4

6

8

10

12

D

0.008

0.8

39

76

75

76

  1. Does compound X appear to have acidic functional groups, basicfunctional groups or both types of groups? Explain youranswer.
  2. The distribution coefficient, KD, at pH 12 is 76.3.Calculate the Ka value for compound X.
  3. The scientist performed multiple extractions of the pollutantfrom 10 mL of water at pH 6 using a total volume of diethyl etherof 100 mL. What mass of compound X will remain in the aqueous phaseafter 4 consecutive   extractions if the initialconcentration of the pollutant was 0.1 M.

(Note: molar mass of compound X = 76g/mol)

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