Only six elements and compounds comprise about 99% of sea salts:chlorine (Cl - ), sodium (Na + ), sulfur (SO 4-2 ), magnesium (Mg +2 ), calcium (Ca +2 ), and potassium (K +) ( Figure 8p-1 ). The relative abundance of the major salts in seawater are constant regardless of the ocean. Chemical composition of seawater; Salinity and the major Chemical composition of seawater. Salinity Salinity is the amount of dissolved solids in seawater 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
Seawater Composition Almost anything can be found in seawater. This includes dissolved materials from Earth's crust as well as materials released from organisms. The most important components of seawater that influence life forms are salinity, temperature, dissolved gases (mostly oxygen and carbon dioxide), nutrients, and pH. What is the chemical composition of sea water?