GEOL 3070 Chapter Notes - Chapter 5: Magnesium, Osmosis, Electrodialysis
20 Mar 2017
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Dissolving ability of water: ion: charged atom or groups of atoms, cation: an ion with a positive charge, anion: aton with a negative charge, ionic bonds: the electrostatic force that holds together oppositely charged ions. Units of concentration: expressed by weight: concentrations are given as g/kg (parts per thousand), mg/kg (parts per million), or even parts per billion. Ocean salinities: 3. 5% of ocean is dissolved salt, and 96. 5% is water, salinity: measure of quantity of dissolved salts in seawater. Average ocean salinity is 35: salinity associated with latitude --> evaporation, precipitation, freezing, thawing, and freshwater runoff. Dissolved salts: major constituents: a total of 11 ions dissolved in seawater that account for 99. 99% by weight in the ions of the solution. Potassium: trace elements: all other elements dissolved in seawater that are present in concentrations of less than one part per million. Sources of salt: original sources: crust and interior of earth.
