If people don't eat salt for a month, the sodium content in the body will be too low, resulting in loss of appetite, weakness of limbs and dizziness. In severe cases, there will be anorexia, nausea, vomiting, increased heart rate, weak pulse, muscle spasm, blurred vision, weakened reflex and other symptoms.

If you don't put some salt in the dish when you eat, even the delicacies are like chewing wax. Salt is not only an important condiment, but also an indispensable substance to maintain the normal development of human body.

Adjust the balanced distribution of water in human body, maintain osmotic pressure inside and outside cells, participate in the formation of gastric acid, promote the secretion of digestive juice, and stimulate appetite; At the same time, it also ensures the pH necessary for the action of pepsin, maintains the balance of pH in the body and the normal circulation of body fluids.

Extended data:

Salt refers to a kind of compound in which metal ions or ammonium ions (NH4+) are combined with acidic ions or nonmetallic ions. Such as sodium chloride, calcium nitrate, ferrous sulfate, ammonium acetate, calcium sulfate, copper chloride, sodium acetate, etc.

Generally speaking, salt is the product of metathesis reaction. Salt reacts with salt to produce new salt and new salt, salt reacts with alkali to produce new salt and new alkali, salt reacts with acid to produce new salt and new acid, such as sulfuric acid and sodium hydroxide to produce sodium sulfate and water, and sodium chloride and silver nitrate to produce silver chloride and sodium nitrate. There are other reactions that can also produce salts, such as displacement reactions.

The solution of soluble salt is conductive, because there are free-swimming ions in the solution, so it can be used as electrolyte. Hydrochloric acid is not only an important product of salt chemical industry, but also an important raw material for producing silicon materials.

Strong base weak acid salt is a salt produced by the reaction of strong base and weak acid, which is alkaline when dissolved in water, such as sodium carbonate. Strong acid and weak base salt is a salt produced by the reaction of strong acid and weak base, which is acidic when dissolved in water, such as ferric chloride.

Seawater is the "hometown" of salt, which contains all kinds of salt, about 90% of which is sodium chloride, that is, 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 component of brine used in tofu, and its taste is bitter. Therefore, seawater with a large proportion of salt tastes salty and bitter.

If all the salt in the seawater is extracted and laid flat on the land, the height of the land can be increased 153 meters; If all the water in the world's oceans evaporates, a 60-meter-thick salt layer will accumulate on the seabed.

References:

Baidu encyclopedia-salt