Chemistry 2210A/B Lecture 9: Chapter-9
11 Sep 2018
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Chapter 10: chemistry of natural waters part 1 & 2. Water in form of ice on land, has implications on global warming if it melts. Rising ocean levels are thus a major concern. That projection of eight years time is on low side because our population is already 7. 6 billion. Two types of reaction that can happen in water. Often things change solubility in water depending on the ph of the water. Those reactions are mostly controlling the inorganic content of the water (salts, calcium carbonates and bicarbonates). Redox reactions are controlling the organic matter content in water. types of: acid-base & solubility rxns, control [dissolved inorganic ions, ph mainly controlled by dissolution of atmospheric co2 (forms carbonic acid) Ion solubility dependent on ph: oxidation-reduction (redox) rxns, controls [organic content] in water, organic content is oxidizable, many involve oxygen, dissolved o = potential oxidizing agent. In water, the way ppm is defined is different than gas phase.
