Experiments.- Water Characterization.- Dissolved Oxygen in Water.- Alkalinity and Buffering Capacity of Water.- Aqueous Carbonate Equilibria and Water Corrosiveness.- The Point of Zero Charge of Oxides.- Experimental Transitions in E vs pH (or Pourbaix) Diagrams.- Air Oxidation of Metal Ions.- Photoassisted Reduction of Metal Complexes.- Anionic Detergents and o-Phosphates in Water.- Halogenated Hydrocarbons and the Ozone Layer Depletion.- Acid Mine (or Acid Rock) Drainage.- Electrochemical Treatment of Gas Pollutants.- Electrochemical Treatment of Liquid Wastes.- Electrochemical Treatment of Polluted Soils.- Removal of Nitric Oxide by Complex Formation.- Photocatalytic Remediation of Pollutants.- Chemical Mineralization of Pollutants Through the Fenton Reaction.- Production and Analysis of Chloramines.- Production and Analysis of Chlorine Dioxide.- Metal Ion Recovery By Cementation.- Green Chemistry: The Recovery and Reuse of Sulfur Dioxide (Obendrauf’s Method).- Microorganisms in Soil, Water, and Air.- Toxicity Assay Using Bacterial Growth.- Wastewater Disinfection.