Quantitative equilibrium calculations

Fundamentals
Problems
      Fraction of atrazine
           Help
           Answer
     Retardation factor
           Answer
     Raining out
           Answer
     Carpet
           Help
           Answer
     Sorption kinetics
           Help
           Answer
     Organic pollutants in water
           Answer
     Fish toxicity test
           Answer
     Ethylacetate
           Answer
     Tetrachlorobenzene
           Answer
     Hexachlorobenzene
           Answer
     Chlorobenzene
           Answer
     Toxicity test
           Answer
     Toxicity test - improving...
     3 phases problem
           Answer
     Sorption experiment
           Answer
     HCH
Excercises for an improved intuitive understanding
Questions for recapitulation
Good to know
Minesweeper-problems

What fraction of atrazine is present in dissolved form?

Atrazine is still one of the most widely used herbicides worldwide. Estimate the fraction of total atrazine present in truly dissolved form (a) in lake water exhibiting 2 mg particulate organic carbon (POC) suspended per L water, (b) in marsh water containing 100 mg solids L-1, if the solid's organic carbon content is 20%, and (c) in an aquifer exhibiting a porosity of 0.2 by volume, a density of the minerals of 2.5 kg L-1, and an organic carbon content of 0.5%. Assume that partitioning to organic matter is the major sorption mechanism.

Use the following sorption constant for atrazine

If you are confused because you do not understand what to do with the organic carbon content and how to deal with phases that are not quantified by volume then it is high time to read chapter 3 in the textbook.

Question: What practical relevance do the results have?

 

Proceed