The main reason why seawater is salty is that seawater contains all kinds of salts, most of which are chlorine ǜ Sodium chloride, and a small amount of magnesium chloride, calcium sulfate, etc. Check out why the sea is salty!
Why is sea water salty
Is the sea salty? Is the sea always salty? According to scientists' speculation, when the earth's ocean was just formed, the sea water was not salty, but a fresh water ocean. As the rain fell, it constantly washed the rocks on the ground. High school composition washed out the salt hidden in the rocks and brought it to the ocean with the river. In this way, over time, the ocean began to have salt. Fine dust in the air or substances emitted by volcanoes are also factors in the source of sea salt. So the sea becomes salty.
If the salt elements are continuously imported into the ocean, won't the sea become more and more salty? Fortunately, organisms in the ocean will absorb a lot of salt substances, and chemical adsorption and sedimentation will also transfer some of the salt in the sea water into the form of sediment. According to the test research, the sea water is not getting saltier and the salt in the sea water is not increasing.
Why isn't the lake salty? Because the water in the air is collected into the lake through snow, rain and groundwater, it becomes lake water, and the salt of the lake water is one hundredth of that of seawater, so we can't feel the saltiness. But like a lake in the desert, the lake water is constantly evaporated, and the lake water will be as salty as sea water. The Dead Sea across Jordan and Israel is the world-famous salt water lake.
It is estimated that the water in seawater is only 96.5%, and the other 3.5% is potassium chloride, magnesium chloride and other salts. According to the experiment, an average of 35 grams of salt are dissolved in each kilogram of seawater, of which potassium chloride (salt) accounts for a large proportion. Because there is a large amount of potassium chloride, the seawater is salty.
Residents of coastal cities in China introduced sea water in the early stage and used the method of sunlight to extract sea salt for consumption, which proves that sea water contains salt and sea water is salty. We can fill a 1250cc bottle with seawater, heat it and evaporate it to get about a tablespoon of salt, so it can also prove that the seawater contains salt.
In this way, we all understand that sea water is salty.
The reason why seawater is salty
Because seawater contains salt. Some salt comes from volcanoes on the seafloor, but most of it comes from rocks in the earth's crust. Rocks disintegrate due to weathering and release salts, which are then carried by the river to the sea. In the circulation process of seawater vaporization and then condensation into water, after seawater evaporation, salt remains and gradually accumulates to the existing concentration. The ocean contains so much salt that it can spread a layer of salt about 500 feet thick on land all over the world.
The salt content in the sea water of the world's major oceans varies from place to place, with an average of about 3.5%. The most common inorganic salt dissolved in the sea water is sodium chloride, that is, daily salt.
Seawater is a very complex solution. Various elements in seawater exist in certain physicochemical forms. The existing forms of copper in seawater are more complex, and most of them exist in the form of organic compounds. Only a small part of free ions exist in the form of divalent positive ions, and most of them appear as negative ion complexes. Therefore, free copper ions account for only a small part of all dissolved copper. Seawater is rich in sodium, but its chemical behavior is very simple. Almost all of it exists in the form of Na + ions.
Dissolved organic matter in seawater is very complex. It is mainly a substance called "marine humus". Its properties are similar to humic acid and sensitive acid produced by vegetation decomposition in soil. The molecular structure of marine humus has not been fully determined, but it can form reinforcing complexes with metals.
Legend about the sea
Once upon a time, there was a man who loved the sea. He went to the seaside to see the sea every day, but the sea was still very cold to him. The man said to the sea, I treat you like this and come to see you every day, but you are always light to me. Can't you show your passion to me? Let your love come more violently. The sea listened to his words and asked him, can you accept my tumultuous love? He replied: Yes, let your love come more fiercely! The sea was moved by his words In an instant, the huge waves rolled and the wind was strong. The huge waves came to the shore one after another. He had never seen the sea. In this way, when the waves came near him, he turned and ran away. At this time, the sea was very sad.
After this, the sea dare not give love to others easily. After a long time, there was another person who loved the sea. He not only came to see the sea every day, but also moved his home to the seaside. He should be accompanied by the sea and guard the sea all his life. Hai was finally influenced by his actions and gave him warm love and fierce love. He didn't run, so they combined. But after a long time, he was a little bored. He always felt that the sea gave him either calm or rolling waves. He felt that the sea could no longer give him any other love, so he quietly left the sea.
The sea is very sad. All these are seen by the blue sky. He said to the sea: please don't be sad. In fact, they don't understand you. What they see is your surface. In fact, the world under the sea is more colorful. There are colorful fish, rich minerals and beautiful corals. These are what you prepared for them, but they don't understand. Blue sky said: only I know this.
Then the blue sky fell in love with the sea. After the sea and the blue sky fall in love, but because they are far apart and coupled with secular prejudice, they can't hold hands. They are far apart and miss each other. With the passage of time, their thoughts become stronger. In this way, day after day, year after year, when missing is unbearable, the blue sky washes its face with tears, and the tears of the blue sky drip into the heart of the sea. I don't know how many tears are left, which dye the whole sea blue. They are the tears of the blue sky, so the sea and sky are the same.