It is something that we all take for granted, sea water is salty, now, do you really know the reason for this? We explain it to you.
Now that the holidays have arrived, there are many who decide to spend them on the beach and, consequently, bathing in the sea. Some like the fact that it is extremely salty and others suffer from skin problems due to this saltiness.
However, why is it salty? The salt in the sea, or the salinity of the ocean, It is mainly due to the fact that the rain carries mineral ions from the earth to the water.
Carbon dioxide from the air dissolves in rainwater, making it slightly acidic. When rain falls, it wears down rocks, releasing mineral salts that break down into ions. These ions are carried away by the water and eventually end up in the ocean.
Note that sodium and chloride, the main components of the type of salt used in cooking, make up more than 90% of all the ions found in seawater.
Now this salinity also It comes from another source: hydrothermal fluids, which come from vents on the seabed. Ocean water seeps through cracks in the Earth and is heated by magma in the core. Water tends to lose oxygen, magnesium, and sulfates, and pick up metals such as iron, zinc, and copper.
It is through the vents in the seabed that this transformed water is released. It is also true that many eruptions already release these minerals directly into the sea without the need for this process.
The concentration of salt in seawater will vary with temperature, evaporation and precipitation. Salinity is usually low at the equator and at the poles, and high at mid-latitudes.
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