The properties and differences between Na2CO3 and NaCO3 in chemistry

na2co3: Chinese aliases (commonly known): soda ash, block alkali, soda (soda).

Mouth alkali (Historically, it was generally transported to the whole country through Zhangjiakou and Gubeikou, so there is also the saying of "mouth alkali".) ), alkaline noodles (edible alkali).

The sodium carbonate that is present in nature, such as salt water lakes, is called trona.

The industrial name of sodium carbonate without crystalline water is light alkali, and the industrial name of sodium carbonate with crystalline water is heavy alkali.

Sodium carbonate is a salt, not a base. Because the aqueous solution of sodium carbonate is alkaline, it is also known as soda ash and other sayings.

NaHCO3: Trait:

White powder or fine crystals, odorless, salty, soluble in water, but less soluble than sodium carbonate in water, slightly soluble in ethanol, aqueous solution is slightly alkaline. It is easy to decompose when heated. Slowly decomposes in moist air. At about 50 begins to lose carbon dioxide, at 100

All become sodium carbonate. It is rapidly decomposed in weak acid, and its aqueous solution begins to decompose carbon dioxide and sodium carbonate at 20, and all decompose at the boiling point. Soluble in 10 parts of water at 25 o'clock, soluble in 12 parts of water at about 18 o'clock, insoluble in ethanol.

The solution made of cold water without agitation only reacts slightly alkaline to phenolphthalein test strips, and its alkalinity increases when placed or raised at a higher temperature. 25 Freshly prepared water-soluble.

The pH of the liquid is. Relative density. Low toxicity, half lethal dose (rat, oral) 4420mg kg.

First of all, sodium carbonate does not decompose when heated, and sodium bicarbonate is easy to decompose when heated and produces sodium carbonate, carbon dioxide and water.

Second, sodium carbonate can react with carbon dioxide and water to form sodium bicarbonate, which sodium bicarbonate cannot.

Then, sodium carbonate can precipitate with calcium hydroxide, barium hydroxide, etc., but cannot react with potassium hydroxide and sodium hydroxide, while sodium bicarbonate can, this is the biggest difference, the product is judged according to the fixed method, if you want to know, you can also ask.

Sodium carbonate is an inorganic compound with the molecular formula Na Co and molecular weight, also known as soda ash, but it is classified as salt and not as alkali.

traits

Sodium carbonate is a white, odorless powder or granule at room temperature. It is absorbent and gradually absorbs 1mol l of water (about = 15%) in the open air. Its hydrates are Na2CO3·H2O, Na2CO3·7H2O and Na2CO3·10H2O.

Solubility

Sodium carbonate is easily soluble in water and glycerol. 20 per 100 grams of water can dissolve 20 grams of sodium carbonate, when the solubility is the largest, 100 grams of water can be dissolved gram of sodium carbonate, slightly soluble in absolute ethanol, insoluble in propanol.

1. The aqueous solution of sodium carbonate is strongly alkaline (pH = and has a certain corrosiveness, which can metacompose with acids, and can also metacompose with some calcium salts and barium salts.

2. Hydrolysis reaction: due to the hydrolysis of sodium carbonate in aqueous solution, the ionized carbonate ions combine with the hydrogen ions in the water to form bicarbonate ions, resulting in the reduction of hydrogen ions in the solution, leaving ionized hydroxide ions, so the pH of the solution is alkaline.

1.Washing oil stains: Since the aqueous solution of sodium carbonate is weakly alkaline and has a slippery feeling, it can be used to wash oil stains.

2.Gas fire extinguishers: Sodium carbonate also reacts violently when it encounters acid, so it can also be used to make gas fire extinguishers.

3.Glass: It can be made of flat glass and ordinary glass.

4.Laundry detergent: Synthetic laundry detergent.

5.Alumina: Synthetic alumina.

6.Making pastry: Sodium carbonate is often used to make pastry in life.

7.Formulation: Formulated as a detergent.

8.Purified water: Purifies water as a softener.

Physical properties: Sodium carbonate is a colorless powder of white song slag that is easily soluble in water, and the solution is alkaline. It can decompose at high temperature, but does not decompose when heated.

Chemical properties. 1. Weathering. It is easy to weather in the air wilderness.

2. Reaction with acid. For example, sodium carbonate reacts with excess hydrochloric acid to form sodium chloride and carbonic acid.

3. Reaction with alkali. For example, sodium carbonate and calcium hydroxide react to form sodium hydroxide and calcium carbonate precipitates. Liang Wu.

4. Reaction with salt. For example, sodium carbonate and barium chloride react to form sodium chloride and barium carbonate precipitates.

5. React with water and carbon dioxide to generate sodium bicarbonate.

NACO chemical name: sodium carbonate, commonly known as soda in life, also known as soda ash or something. It is a salt in chemistry.

Chemical Formula】Na2CO3

Molecular weight] common name] soda ash, soda (soda).

Appearance: White powder or fine-grained crystals (anhydrous pure) [Taste] Astringent.

Relative density (water = 1).

Melting Point] 851

Classification] strong alkali and weak salt.

Stability] It can be decomposed at high temperatures to produce sodium oxide and carbon dioxide. Long-term exposure to the air can absorb moisture and carbon dioxide in the air, form sodium bicarbonate, and form hard lumps. It is very hygroscopic, easily forms hard lumps, and does not decompose at high temperatures.

There are three types of sodium carbonate containing crystalline water: Na2CO3·H2O, Na2CO3·7H2O, and Na2CO3·10H2O.

Solubility] soluble in water, slightly soluble in absolute ethanol, insoluble in propanol.

Sodium carbonate is easily soluble in water, is a weak salt, dissolved in water after hydrolysis reaction, so that the solution is alkaline, has a certain corrosiveness, can neutralize with acid, generate the corresponding salt and release carbon dioxide.

Upstairs bai

I read it wrong, it's sodium thiosulfate, but it's okay.

du is seen as a sodium sulfur in which one oxygen is replaced by sulfur, which is two back sulfurs. Popularly known as Haibo soda da.

It has strong reductivity.

Chemical Properties: Na2S2O3 + H2SO4 == Na2SO4 + S + SO2 + H2O (mainly this one).

i2 + 2s2o32- == 2i- +s4o62-

The reaction is as follows, (the equation is checked online, it is inconvenient to play).

It can react with solutions containing barium ions and silver ions.

It can react with calcium hydroxide at 100 degrees Celsius.