Why is seawater salty. What are the benefits and disadvantages of taking a sea bath for the human bo

Seawater is the "home" of salt, and seawater contains various salts, about 90% of which are sodium chloride, that is, table salt. In addition, it also contains magnesium chloride, magnesium sulfate, magnesium carbonate and other salts containing potassium, iodine, sodium, bromine and other elements. Magnesium chloride is the main ingredient of the brine used for tofu, and the taste is bitter, so the seawater with a large proportion of salt is salty and bitter to drink.

Seawater is not salty, but it is made up of many elements. Taking a bath in the sea can reduce inflammation and sterilize. However, people with allergies are not suitable for bathing.

The reason why seawater is salty is because there are about 3 5% salt in seawater, most of which is sodium chloride, and a small amount of magnesium chloride, potassium sulfate, calcium carbonate, etc.

Seawater is salty because there is a high concentration of salt in seawater, which mainly has the following two salts**: first, the erosion of soil and rocks on land in the process of precipitation forming runoff brings salt-containing minerals into rivers and eventually into the ocean; The second is that the geological activity of the seabed itself (volcanic eruptions, seabed hydrothermal fluids, etc.) will dissolve a part of the salt into the seawater. Seawater is the "homeland" of salt, and for good reason.

In the early days of the formation of the earth, all living objects were slowly germinating, and among the medium on which life depended, the ocean was an excellent breeding ground for the growth of life. In the long geological period of the earth, the surface water that has just begun to form is freshwater. Later, because the salt in the surface rock was dissolved in the continuous erosion and erosion of the water flow, the water contained salt, and the water containing salt continued to form rivers and eventually flow into the sea.

Over time, water vapor evaporates and leaves behind salt particles, and the more salt accumulates, the more salty the seawater naturally becomes salty, and after billions of years of cycles, most of the seawater now contains about 35% salt.

Some people may ask, the river water is fresh water, and why the rivers on land continue to flow into the ocean and do not dilute the seawater. This is because the ocean is evaporating all the time, and there is no salt in the evaporated water vapor, and the part of the water vapor evaporated by the ocean is transported to the land to form rainfall, which again erodes the land and carries salt into the ocean. So will the sea water get saltier?

The answer is no, because the processes of salinity entering seawater and mineralization of dissolved salts in seawater have reached a dynamic equilibrium.

Some of the lakes on land are freshwater lakes and some are saltwater lakes for similar reasons: saltwater lakes tend to only enter but not exit, rivers flow in but do not have outlets, evaporation makes the lake salty, while freshwater lakes often have outlets. Seawater dissolves a large number of minerals from land, mainly sodium chloride and magnesium chloride, and is therefore salty.

The reason why seawater is salty is because there are about salts in seawater, 90% of which is sodium chloride, that is, table salt, and a small amount of magnesium chloride, potassium sulfate, calcium carbonate, etc. It is these salts that make the sea water bitter and astringent.

Because there is salt in the seawater, most of this salt comes from the volcanoes under the sea, so it is salty.

Because the salt content in seawater is relatively high, it gives people a salty feeling, which is related to the composition of seawater.

Because there will be a lot of salt in the seawater, and the salt contained in it. There is also 90% sodium chloride. So it's going to be idle.

On the question of why seawater is salty, scientists basically agree on it. They believe that seawater is not full of salt in the first place. Because the Earth's water is constantly moving and circulating, hundreds of millions of tons of water evaporate from the surface of the ocean every year.

This amount of water then turns into rain and falls to every corner of the land, and it flows and destroys the rocks, washes the soil, and carries the soluble matter (mostly salts) in the rock and soil into the river, and finally the river returns to the sea, and the water returns to its homeland, the ocean. In this way, the ocean receives a steady stream of salts from the land, but in the process of evaporation of seawater, these salts cannot be lifted with the water vapor and can only remain in the ocean. Over time, the amount of salt in the ocean accumulates more and more, and over millions of years or more, the amount of salt accumulated in the sea is considerable.

But there is also an opinion that seawater is salty from the beginning and is formed by nature. The reason is that, after a long period of observation, it was found that the sea water did not become saltier and the salinity in the sea water did not increase significantly.

There is also a view that the saltiness of seawater is not only due to congenital but also acquired reasons, not only because salts from the continents are constantly added to the ocean, but also because of the continuous addition of salt to the ocean at the bottom of the ocean with the eruption of submarine volcanoes.

Seawater is known as the home of salt, and all kinds of salts are collected in it, most of which is a salt called sodium chloride, which is the table salt we usually eat. The rest is magnesium sulfate, magnesium carbonate and other salts of various elements, so seawater, which has a very high salt content, tastes salty.

In fact, the most primitive ocean is fresh water, not salt water, and then the water in nature washes the rocks and salt mines for a long time, taking away the salt in them, and finally collects into the ocean, slowly accumulating more and more, and it becomes the sea water we see now, although there is a lot of salt in the sea, but the ocean pollution is serious, and the salt we eat is lake salt and well salt.

Salt comes mainly from the land. When it rains, the accumulation of carbon dioxide in the atmosphere makes the rain more acidic. Weakly acidic rainwater flowing over the land erodes the rocks while mixing in small amounts of salt and other minerals.

The water at this time contains some salt, but it is still drinkable. Eventually, the rain flows into the ocean, and the minerals dissolved in the water, such as calcium, precipitate out of the water, while most of the salt remains in the water. Underwater geothermal and volcanic activity also incorporates salt into the sea.

It's salty because there's salt in it.

Because seawater contains salt. Some of the salt comes from volcanoes at the bottom of the sea, but most of it comes from rocks in the earth's crust. The rocks are weathered and disintegrate, releasing salts, which are then carried to the sea by the river.

In the cycle of vaporization and condensation of seawater into water, the salts remain after the evaporation of seawater and gradually accumulate to their current concentrations. The oceans contain so much salt that they can spread up to 500 feet thick on the world's land.

The salt content of seawater in the world's oceans varies from place to place, but the average is about the most common of these inorganic salts dissolved in seawater, sodium chloride, i.e. table salt for daily use.

The reason for the salty taste of seawater is that it contains a variety of inorganic salts and trace elements dissolved in water. When water flows from the surface into the ocean, it carries a variety of substances, including minerals in rocks, dissolved matter in rivers, and decomposition products of marine organisms. Some of these substances are salts, including sodium chloride (table salt), sodium sulfate, magnesium chloride, and calcium carbonate, among others.

These salts and trace elements are dissolved in the water, creating the salinity in seawater. The average salinity of seawater is about 35 grams per liter, which means that each liter of seawater contains about 35 grams of dissolved salt. This is why sea water has a salty taste.

The salinity level of seawater can vary from location to location and at depth because of various factors such as freshwater inflow into river esturies, precipitation, evaporation rates and ocean cycles.

It is important to note that although seawater contains salts and trace elements, not all water bodies are salty. Freshwater lakes, rivers and groundwater, among others, have lower salinity levels because they are usually not exposed to large amounts of salt.