Soil Equilibria: What Happens to Acid Rain? 

     Module written by G. C. Lisensky, R. Hulet, M. Beug, and S. Anthony

     Quicktime Movies and MathCad files by G. C. Lisensky

    Help with Quicktime Movies

    Session 1: How is acid rain formed?

      Exploration 1A: How is acid rain formed?
      Exploration 1B: How do power plants and automobile emissions affect lakes and cities?
      Exploration 1C: What are the problems caused by acid rain?
      Making the Link: What happens to the oxides of sulfur and nitrogen formed by combustion?

      External Links (National Environment Ministries and Agencies)

    Session 2: What is an acid?

      Exploration 2A: What household products behave like acid rain?
      Exploration 2B: How do we identify acids from a chemical formula?
      Exploration 2C: What is pH?
      Making the Link: What is an acid?

    Session 3: What is the pH of normal rain?

      Exploration 3A: How do systems respond to stress?

        Equilibria and Le Châtelier's Principle

      Exploration 3B: What is the pH of normal rain?

        pH of rain in the United States
        http://h2o.usgs.gov/nwc/NWC/pH/html/ph.html

      Exploration 3C: Is there a faster way to calculate pH?

        Movies: Logarithmic Concentration Diagrams

      Exploration 3D: How can we solve simultaneous equations without approximations?
      Making the Link: How do you predict the pH of a weak acid?

    Session 4: How does acid rain interact with soil?

      Exploration 4A: How does acid rain interact with soil?

        Building the Phyllosilicates
        http://pubpages.unh.edu/~harter/crystal.htm
        Virtual Museum of Minerals and Molecules
        See the phyllosilicates and tectosilicates in the Silicate Gallery
        See Soil Organic Matter for a model with humic acid, soil protein, and soil saccharides
        http://www.soils.wisc.edu/virtual_museum

      Exploration 4B: How does ion exchange work?
      Exploration 4C: How does ion-exchange protect soils from acid rain?

        Some Indicator Colors

      Exploration 4D: What happens when the buffer runs out?

        Movies: Titration Curves

      Exploration 4E: Polyprotic Acids and Bases
      Making the Link: Has this area been affected by acid rain?

    Session 5: Is this soil nutritious or toxic?

      Exploration 5A: Are all soils the same?

        World Reference Base for Soil Resources

      Exploration 5B: Will aluminum be mobilized?
      Exploration 5C: What is my soil's cation exchange capacity?
      Exploration 5D: What is my soil's base saturation?
      Exploration 5E: Metals and Ligands

        Movies: EDTA Titrations

      Making the Link: Is this soil nutritious or toxic?

    Session 6: What are the critical problems in your region?

      External Links (National Environment Ministries and Agencies)

    Appendices

      Equilibrium Constants
      Collecting Soil Samples


    Copyright © 2000 by the Trustees of Beloit College and the Regents of the University of California.
    This Sooil Equilibria Module has been developed under the direction of the ChemLinks Coalition, headed by Beloit College, and The ModularChem Consortium, headed by the University of California at Berkeley. This material is based upon work supported by the National Science Foundation grants No. DUE-9455918 and DUE-9455924. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation, Beloit College, or the Regents of the University of California.


    What Happens to Acid Rain? | ChemConnections