The salt water consists mostly of the following substances: dissolved salts (predominantly sodium (Na+ ) and chloride (Cl− ) ions.The other most abundant ions of seawater are sulfate (SO24−), magnesium (Mg2+), calcium (Ca2+), and potassium (K+).
Average density at the surface is 1.025 kg/L. The two
substance that can be seen in salt in sea water is sodium and chloride, seawater
has approximately 35 grams (1.2 oz) of dissolved salts (predominantly sodium
(Na+) and chloride (Cl−) ions). Seawater is denser than both fresh water and
pure water (density 1.0 kg/L at 4 °C (39 °F)) because the dissolved salts
increase the mass by a larger proportion than the volume.
