Dissolved O2: Lab IntroOxygen is essential to life not only on land, but also in the aquatic environment. In the aquatic environment, oxygen must first be dissolved in water before it can be used by marine organisms. The solubility, the amount of a substance that can be dissolved in a given amount of solvent, of oxygen varies greatly depending on numerous factors. The amount of oxygen present in water is called dissolved oxygen. The dissolved oxygen concentration can be measured either by the amount of carbon dioxide used, or the rate of sugar formation, or the rate of oxygen production. Dissolved oxygen concentration does not solely depend on chemical and physical factors. Biological processes like photosynthesis and respiration can significantly alter the concentration of dissolved oxygen, which is one of the many important determinants of water quality. The concentration and distribution of oxygen is very different in water than in the air. There are 200 milliliters of oxygen for every liter of air, but only 5 to 10 milliliters of
This is the end of the preview.
access the rest of the document.