Why does salt melt when it encounters water, and what does industrial salt react when it encounters

The salt referred to by the landlord is sodium chloride nacl, sodium chloride solid added to water, due to the irregular movement of water molecules, colliding with sodium chloride from various angles, so that the sodium chloride on the crystal surface is unevenly stressed, which will destroy the original stable structure, chloride ions, sodium ions detach from the original crystal surface, forming freely moving sodium ions, chloride ions, and then surrounded by water molecules, the essence is the existence of hydrated chloride ions, hydrated sodium ions, and constantly repeat this process, sodium chloride will be dissolved into water.

One is the process of solute particles (molecules or ions) overcoming mutual forces and diffusing into water under the action of solvent molecules (i.e., water molecules in aqueous solution), which is a process of physical change; The other is the process by which the particles (molecules or ions) of the solute and the water molecules interact to form hydrated molecules or hydrated ions, which is a process of chemical change. Both processes exist at the same time. The solute particles in the solvent (water) rely on hydration and diffusion, leave the solute body, and diffuse evenly between the water molecules, thus gradually dissolving.

The hydration and diffusion process of solute particles is difficult to observe with the naked eye, but can be confirmed experimentally. In addition, when solute particles diffuse in water, they need to absorb heat, so that the temperature of the solution is reduced. When solute particles and water molecules combine to form hydrated molecules or hydrated ions, heat is released, increasing the temperature of the solution.

Hydrolysis of salts:

The hydrolysis of salts is due to the production of weak ions when salts are ionized when they are dissolved in water.

What is a weak ion, in fact, is the anion (cation) corresponding to a weak acid (weak base).

Only salt will be hydrolyzed, and only salt dissolved in water will be ionized with weak ions.

In general, the metals that rank after magnesium in the order of activity (excluding magnesium) are weak cations. Cationic hydrolysis is acidic.

Weak anions are: carbonate, bicarbonate, silicate, fluoride ion, sulfur ion, nitrite ion, acetate ion, hypochlorite ion. Anionic hydrolysis is alkaline.

If a salt contains both weak cations and weak anions, then both weak ions will be hydrolyzed. At this time, to analyze the acidity and alkalinity of the solution, it is necessary to see which of the two weak ions has a large degree of hydrolysis, and the degree of weak cations is alkaline, and vice versa, acidic.

What is the reaction of industrial salt when it encounters water: industrial salt is mainly used for the reduction of resin in the water treatment process, replacing CA and MG plasma with NA ions, and discharging CA and MG plasma to restore the resin activity. Industrial salt can also be used as a counterweight for various resins and cushions in the process of water treatment of slippery oranges.

pretreatment. Industrial salt is one of the most basic raw materials in the chemical industry, and the main component is sodium chloride.

Sodium nitrite, etc., is known as the "mother of the chemical industry". The main products of the basic chemical industry are hydrochloric acid, caustic soda, soda ash, and ammonium chloride.

Chlorine, etc., is mainly produced from industrial salt. The main products of the basic chemical industry, such as hydrochloric acid, caustic soda, soda ash, ammonium chloride, chlorine, etc., are mainly produced by Xindong with industrial salt as raw materials.

Edible.

It is the salt that absorbs the water in the air and then dissolves the salt in the water for the sake of the DAO.

It looks like it is salted into water, but it is actually salt water. There should be no problem. It can be eaten with confidence.

The main ingredient of edible salt is sodium chloride (NaCl), which also contains a small amount of water and impurities and other elements such as iron, phosphorus and iodine.

Edible salt is iodized salt made by adding a certain amount of iodine to refined salt, crushed washing salt, and sun-dried salt. The iodine in salt can only be biologically active in the human body after it is converted into iodine ions. The properties of iodide are extremely unstable, easy to decompose, volatilize and fail.

Edible. It is because the salt absorbs the moisture in the air, and then the salt dissolves in the water, and on the surface it appears to be salt water, but it is actually salt water. There should be no problem. It can be eaten with confidence.

It's best not to eat it, since it has turned into water, it may take a long time, and the iodine content may not meet the standard. Moreover, salt is not expensive, so it is a pity to abandon it.

You're talking about carbonates. After all, carbonic acid is relatively active and is easily decomposed into carbon dioxide and water in the displacement reaction. Example: Na2CO3+2HCl=2NaCl+CO2+H2O. Hope it helps.

A reaction with salt and water formation is not necessarily a neutralizing reaction.

The key lies in the definition, there is a definite term for the neutralization reaction, the reaction of acid and alkali to produce salt and water, such a reaction is called neutralization reaction, there must be a premise, acid and alkali reaction!

1. Alkaline oxides react with acids to form salt and water. For example:

na2o + 2hcl === 2nacl + h2o

fe2o3 + 3h2so4 === fe2(so4)3 + 3h2o

2. Acidic oxides react with alkali to form salt and water. For example:

2naoh + so3 === na2so4 + h2o

ca(oh)2 + co2 === caco3↓ +h2o

3. The acid and salt undergo metathesis reaction to form new salts and new acids. For example:

caco3 + 2hcl === cacl2 + h2o + co2↑

4. Acid salt is decomposed by heat to form normal salt. For example:

2NaHCO3 === Na2CO3 + H2O + CO2 (condition is heating).

Ca(HCO3)2 === CaCO3 + H2O + CO2 (condition is heated).

5. Crystalline hydrate loves heat to decompose into anhydrous normal salt. For example:

Cuso4·5H2O === Cuso4 + 5H2O (condition is heating).

Hello, I'm glad that I believe that I thought you would answer, I'm Mr. Xiaoxue, and this starts with the chemical composition of salt. The composition of salt is sodium chloride, and the composition of snow is water. Sodium chloride is the only chemical that is extremely soluble in water.

After sodium chloride is dissolved in water, it forms sodium chloride water-soluble slippery blind liquid, which contains sodium ions and chloride ions.

Salt dissolves in water, which is a dissolution process, which is a physical change, and dissolution can be divided into two processes, the first is the diffusion process, which is a physical process. The second is the hydration process, which is a chemical process (not a chemical change).

Table salt is a physical process in the dissolution of substances, Na ions and Cl ions leave the solid surface of NaCl and diffuse into solvent water, thus forming a uniform liquid phase. This can be referred to as dissolving.

The dissolution of table salt in water is an ionization process, and there is a break of ionic bonds, which will release heat. Sucrose dissolution is a process of dilution and dispersion, and the sucrose molecule exists as a whole and will not break, but it is just a process of molecular dilution or dispersion in water.

At first, it will slowly dissolve, and the more it is added, it will reach saturation, and then it will not be dissolved, and if it is heated, it can dissolve a part, and there will be salt crystals precipitated after it cools. Because the solubility of water to table salt increases with the increase of temperature, but there is a certain limit, and its solubility decreases when the temperature decreases.

1. Adding boiling water to the salt can make the salt melt quickly.

2. Stirring salt can also accelerate the melting of salt.

The process of salt dissolution is divided into two steps, the first is the diffusion process of solute molecules or ions, which is endothermic, the process of combining into hydrated molecules or ions is exothermic, and the speed of solute dissolution is related to the process of diffusion and dispersion, and it is also the process of endothermy.

1. Pour the salt into a cup of boiling water, and the hot boiled water can accelerate the dissolution.

2. Take a chopstick to stir Yuhe, stirring can also speed up the easy branch potato.

Hello! What does salt hydrate quickly? I think Yan should be quickly melted with warm water.