GEOL 103 Study Guide - Final Guide: Biocide, Kidney Stone Disease, Water Pollution
Document Summary
Occurs when the concentration of a substance is raised to the point where the water becomes unusable for its intended purpose. Photo finishing and paper production requires soft water low hardness levels- (below 60 ppm) are corrosive to plumbing made from copper, iron, and lead solder. High hardness levels( above 250 ppm) form scale inside pipes creating barrier preventing the water from flowing freely spotting on glassware in dishwashers. Measure of hydrogen ions (h+ ) in the water. Water made up of hydrogen ions( h+) and hydroxyl (oh-) ions. Solution high in hydroxyl ion concentration (ph 8-14) considered alkaline or basic. Solution with an equal number of hydrogen ions and hydroxyl ions considered neutral ( ph=7) Ph below 6. 5 excess acidity corrosion in pipes causing lead from pipes or solder to leach into solution high hydrogen ion concentration (ph 1-6)- acidic drinking water- low ph harmful to aquatic organisms. Ph above 7. 5 will cause poor tasting water.
