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Cover Environmental Chemistry

Gases in water  

This chapter explores how gases distribute themselves between air and water and how the properties of water change accordingly. It cites Henry's law for simple gases, such as oxygen or nitrogen, that do not react with water and considers the specific case of carbon dioxide, which is a gas that reacts with water and creates a more complex equilibrium system. It also demonstrates how to define alkalinity and acid neutralization capacity and their relation to environmental issues. The chapter refers to gases and other volatile compounds whose vapours may be present at low concentration in the atmosphere. It provides a quantitative description of the distribution of gases between air and water, which depends on the substance's vapour pressure, solubility, and ability to react with water and other components in the hydrosphere.