What is Na2SiO4? What is the difference between Na2SiO3 and Na2SiO4 Thank you

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Sodium silicate. There are two kinds, one is sodium metasilicate, the chemical formula Na 6 0Sio 6 1, the formula amount. The other is sodium orthosilicate (sodium orthosilicate), the chemical formula Na62SiO62, relative molecular weight.

Sodium metasilicate is a common bubbled base.

The low molecular weight crystals prepared by hydrothermal reaction with caustic soda are anhydrous, pentahydrate and nine hydrate, of which nine hydrate only exists in the market in China, is an emergency product with low technical content that is urgently needed in the 80s of the last century for sodium metasilicate and hastily developed, because its melting point is only 42, it is easy to become liquid or paste when stored, and is gradually being phased out, but due to some user habits and some areas are not very concerned about crystal water, sodium metasilicate nine hydrate still has a certain market.

Sodium orthosilicate is a colorless crystal with a melting point of 1291k (1088), which is rare. Water glass.

The solution is alkaline due to hydrolysis (more than soda ash.

Slightly stronger). Because it is a weak salt, it encounters hydrochloric acid, sulfuric acid, nitric acid, and carbon dioxide.

can precipitate silicic acid. Carbon dioxide ingress should be closely protected from incubation, and rubber stoppers should be used to prevent sticking to the grinding glass plugs. In the industry, soda ash and quartz eutectic preparation of Na 6 0Co 6 1+Sio 6 0 Na 6 0Sio 6 1+Co 6 0 are commonly used, and the products are often light blue-green because of the ferrous salt.

used as an inorganic adhesive preparation (can be used with talcum powder.

and so on), soap filler, acid-resistant concrete, after adding pigments, it can be used as a coating for exterior walls, and poured into the foundation soil of ancient buildings to make the soil firm to prevent collapse.

Na4SiO4 is sodium silicate, the landlord wrote it wrong, the chemical formula of metasilicic acid is H4SiO4, and Na2SiO3 is sodium silicate. These two are actually the same, but with a lot of water added to them.

Sodium silicate. Sodium silicate, also known as sodium metasilicate, chemical formula Na2SiO3, formula 122, colorless crystal or white powder, insoluble in alcohol or acid, aqueous solution is alkaline, and the reaction with acid can precipitate silicate colloidal precipitation.

The aqueous solution of sodium silicate (Na2SiO3), commonly known as "water glass", is an adhesive often used in the construction industry, also known as bubble alkali, which can be used as a soap filler, and sodium silicate can also be used as a fire retardant for wood and textiles.

Physical and chemical properties

The larger the modulus of sodium silicate, the more difficult it is for solid sodium silicate to dissolve in water, n is 1 can be dissolved in warm water, n needs hot water to dissolve when n, and 4 atmospheres is required when n is greater than 3.

The above steam can be dissolved.

The larger the sodium silicate modulus, the more Si content, the increase of sodium silicate viscosity, easy to decompose and harden, increase the adhesion, and the degree of polymerization of sodium silicate in different modulus is different, which leads to significant differences in the silicic acid components that have an important impact on the production and application in the hydrolysate products, so sodium silicate with different modulus has different uses.

The above content reference: Encyclopedia - sodium silicate.

Na2SiO3 generally refers to sodium silicate, commonly known as bubble alkali, which is a water-soluble silicate, and its aqueous solution is commonly known as water glass, which is a mineral binder. Water glass commonly used in construction is an aqueous solution of sodium silicate.

Physical and chemical properties: strong adhesion, high strength, good acid resistance, heat resistance, poor alkali resistance and water resistance.

Colorless orthogonal bipyramidal crystals or white to off-white lumps or powders. Soluble in water, soluble in sodium hydroxide solution, insoluble in ethanol and acid. Melting point 1088. Low toxicity. Keep tightly sealed, cool, dry, and stored.

Uses of water glass:

a. Paint the surface of the material to improve its weathering resistance Scoop or paint porous materials such as clay bricks, cement concrete, Portland concrete, and stone with density to improve the compactness, strength, impermeability, frost resistance and water resistance of the material.

B, the reinforcement of the soil water glass and calcium chloride solution alternately pressed into the soil, the silicic acid gel of Shengyu Changcheng in the humid environment, because of the absorption of water in the soil in the expansion state, so that the soil consolidation.

c. Prepare quick-setting waterproofing agent.

d. Repair the cracks of the brick wall After mixing the water glass, granulated blast furnace slag powder, sand and sodium fluorosilicate in an appropriate proportion, it can be directly pressed into the cracks of the brick wall, which can play a role in bonding and reinforcing.

e. Sodium silicate aqueous solution can be used as the outer surface of the fire door.

f. It can be used to make acid-resistant cement for the lining of furnaces.

g. Preparation of silica gel.

There is a mistake in what you wrote, it should be that hydrochloric acid and Na2SiO3 dissolve and match the dissolution solution to produce a white gelatinous precipitate, and this white colloidal precipitate is called orthosilicic acid H4SiO4

There is no such substance as Na2SiO4.

Na2SiO3+2HCl+H2O=H4SiO4+2NaCl The poor acid of the original silicone is unstable and easily loses water into silicic acid: H4SiO4 = H2SiO3 + H2O

Sodium silicate is called sodium silicate and its aqueous solution is called water glass and is viscous.

Sodium silicate is one of the materials used to make glass.

Sodium silicate is a product of the O2+NaOH reaction.

Chinese name】sodium silicate; Water glass. Foam alkali.

Product Name: water glass; sodium silicate

Structure or Molecular Formula].

na2sio3

Properties] There are a variety of products in liquid, solid and powder form. The most common ones are liquid, colorless, transparent or viscous with a light gray tinge.

Uses] used as petroleum catalytic cracking silicon aluminum catalyst, soap filler, corrugated paper adhesive, metal preservative, water softener, detergent aid, refractory and ceramic raw materials, textile bleaching, dyeing and slurry, mine beneficiation, waterproofing, leak plugging, wood fireproof, food antiseptic and adhesives, silica gel, silica sol, molecular sieve, white carbon black, etc.

Preparation or **].

There are two production methods: dry and wet. The dry process is obtained by melting soda ash (or sodium sulfate plus pulverized coal) and quartz sand at high temperatures, and then cooling, crushing, dissolving, and concentrating. The wet process is obtained by heating and pressurizing liquid caustic soda and quartz sand.

It is difficult to produce high-modulus products by wet process, but it has the advantages of simple process, easy availability of raw materials and low cost.

Others] is composed of sodium oxide and silica in different proportions. The molar ratio of silica and sodium oxide is called modulus. Modulus greater than 3 is "neutral" water glass, and less than 3 is "alkaline" water glass. Physical properties vary from module to modulus.

It should be Na2SiO3, sodium silicate, sodium silicate, Silicate, the specific properties of the online check, you wrote Na2SiO2 in this fraction, SiO2 is very stable, it is impossible to combine with Na, if combined, Si is bivalent. I don't know if it's satisfying. It's been a long time since I've studied chemistry.