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Seawater constitutes a rich source of various commercially important chemical elements. Much of the world’s magnesium is recovered from seawater, as are large quantities of bromine.In certain parts of the world, sodium chloride (table salt) is still obtained by evaporating seawater. In addition, water from the sea, when desalted, can furnish a limitless supply of drinking water.


Some bacteria break down the rocks of the sea floor, influencing seawater chemistry. Oil spills, and runoff containing human sewage and chemical pollutants have a marked effect on microbial life in the vicinity, as well as harbouring pathogens and toxins affecting all forms of marine life.

www.soest.hawaii.edu/oceanography/courses/OCN623/Spring 2015/Salinity2015web.pdf

Chemical composition of seawater. Salinity ... Most common ions in seawater and river water and the ... • The salinity of surface sea water: •High (up to 37.5) in mid-latitudes due to net evaporation •Low at high latitudes (to ~33 above 40°N and S) and at the


This page details the chemical composition of sea water, salinity, density, its dissolved gases, carbon dioxide and pH as limiting factor. Chemical elements in sea water do not exist on their own but are attracted to preferential ions of opposite charge: sulphur will occur mainly as sulphate, sodium as sodium chloride, and so on.


Ocean water has an excellent buffering system with the interaction of carbon dioxide and water so that it is generally always at a pH of 7.5 to 8.5. Neutral water is a pH of 7 while acidic substances are less than 7 (down to 1, which is highly acidic) and alkaline substances are more than 7 (up to 14, which is highly alkaline).


composition or the physical properties of sea water in any Iocality are generally applicable to the water in any other part of the oceans. Except in special areas,such as in the Baltic Sea, the Black Sea, and off the mouths of large rivers, it is not necessary to consider that the water representsspeciallocal types with propertiesthat ...


Introduction to Seawater composition: Water from sea or ocean is called sea water. Sea water has many chemicals in it. It is very saline and its is almost 3.5%.Salinity is because of its chemical composition especially due to sodium chloride.


The composition of salt water, or sea water, is about 35 parts of salts per 1,000 parts of fresh water, though the salinity can vary from between 30 to 37 parts per 1,000. The salts are mostly sodium and chloride, the same ions that go into table salt.


Source: Magazine - Water Condition & purification, Januray 2005. Reverse Osmosis Systems Softener Unit FAQ. Currently the world uses 11.000 desalination plants to produce daily 20 million cubic meters per day. They mostly use seawater with an average TDS of 40.000 ppm and brackish water with an average TDS of 10.000 ppm and can be found in each ...


Sea water or salt water obviously has special chemical and physical properties than the regular water. The chemical analysis of seawater is important in order to fully understand the properties, containment, chemical reaction and other qualities of seawater.