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Ch.19

Environmental chemistry - Water

TermDefinition
Hard Water Water that will not easily form a lather with soap.Hardness in water is caused by Ca2+ or Mg2+ ions
Total Hardness Calcium Hardness + Magnesium Hardness
A Flocculant A chemical added to water to coagulate suspended substances
B.O.D. Biochemical Oxygen Demand is the amount of dissolved oxygen consumed by biological action, when a sample of water is kept at 20 degrees C, In the dark, for five days.
Eutrophication The enrichment of the water with nutrients, which leads to excessive growth of algae.
Created by: FROmine
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