Environmental Chemistry

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Homework Assignment 5 (20 points)

 

  1. Calculate the pressure of oxygen for a system in equilibrium in which [NH4+] = [NO3-1] at pH = 7.00.
  2. What is the pE value at the point on the Fe2+/Fe(OH)3 boundary line in a solution with a soluble iron concentration of 1.00 x 10-4 M at a pH of 6.00?
  3. What is the pE value in an acid mine water sample having [Fe3+] = 7.03 x 10-3 M and [Fe2+] = 3.71 x 10-4 M?
  4. At pH 6.00 and pE 2.58, what is the concentration of Fe2+ in equilibrium with Fe(OH)3?
  5. What is the calculated value of the partial pressure of O2 in acid mine water of pH 2.00, in which [Fe3+] =[Fe2+]?

ENV 440 Homework

Environmental Chemistry -- ENV 440
Last Updated:  02/11/04