Question

What is the most abundant salt in seawater? How do salts enter the oceans?

Answer 1

Hint: The salt which we use in food is the most abundant in seawater. Its chemical formula is NaCl. They dissolve in water into its ions.

Complete answer: The most abundant salt found in seawater is Sodium Chloride (NaCl), a salt which we use in food. Sodium Chloride dissolves in water into its ions, which are present at much higher levels than components of any other salt. Sodium and Chloride together make up around 85 per cent of all dissolved ions in the ocean.

Salt in the ocean enters from two sources, that is runoff from the land and opening in the seafloor. Rocks on land are the major source of salts which get dissolved in seawater. When rain falls on the land which is slightly acidic, it results in the erosion of rocks. This releases ions that are carried away to streams and rivers that eventually drain into the sea or ocean.
The concentration of salt in seawater varies from region to region with temperature, evaporation, and precipitation. Salinity at the equator and the poles is low.

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