Essay On Chemical Properties Of Water

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It is important to identify the difference between physical and chemical properties. Physical changes typically about physical conditions of matter. Chemical changes take place at atomic level when nuclear bonds are either broken or formed. Chemically Seawater is a mixture of some salts and water. Six elements and compounds make out 99% of sea salts which are chlorine (Cl-), sodium (Na+), sulfur (SO4-2), magnesium (Mg+2), calcium (Ca+2), and potassium (K+). The relative abundance of this salts in seawater are constant regardless of the ocean. Seawater also contains small amounts of dissolved gases. These gases are added to seawater from the atmosphere through the stirring of the sea surface by wind and waves. The concentration of gases that can be dissolved into seawater from the atmosphere is determined by temperature and salinity of the water. As temperature and salinity increase the dissolution of these gases decrease. The important atmospheric gases found in seawater include: nitrogen, oxygen, carbon dioxide-in the form of bicarbonate HCO3-, argon, helium, and neon. Compared to the other atmospheric gases, the amount of carbon dioxide dissolved is large.…show more content…
The density of seawater generally increases with decreasing temperature, increasing salinity, and increasing depth in the ocean. Density of seawater at the surface of the ocean varies from 1,020 to 1,029 kilograms per cubic meter. Fresh water freezes at 0.0° Celsius while seawater freezes at colder temperature depending on the concentration of the salts. At a salinity of 35% seawater freezes at about -1.9° Celsius. Sea ice normally contain less salts than liquid water because the molecules of the various salts do not fit well in the highly orderly molecular structure of frozen

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