Sodium carbonate anhydrous is different from sodium carbonate 10 hydrate

Anhydrous sodium carbonate is a five-color powdered solid, and sodium carbonate 10 hydrate is a transparent crystal.

Both are sodium carbonate. There is no difference in chemical properties.

Long-term exposure of anhydrous sodium carbonate 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. If you are interested, you can put lumps of sodium carbonate into a beaker filled with water to dissolve and release heat.

And the original lumpy sodium carbonate gradually turned into a white solid, which was very hard and could not be crushed by hand. It won't change in the slightest if you take the test on the gas stove. I've done this experiment myself.

The saturated sodium carbonate solution is evaporated and crystallized, or let it sit for a few days. You will find that the bottom of the solution has formed transparent crystals. This is sodium carbonate decahydrate.

The surface has a slippery feel (you can hold it in your hand, but wash off the sodium carbonate when you're done). After a period of time, sodium carbonate 10 hydrate will gradually weather, losing its crystal water. The surface is attached with a white solid (anhydrous sodium carbonate).

Eventually, it will all turn into a white powdery solid. The reason is that anhydrous sodium carbonate itself is not crystalline. The lattice gyrus located on the surface of sodium carbonate 10 hydrate gradually loses water.

This, in turn, leads to the weathering and dehydration of the sodium carbonate crystals located in the inner layer. Eventually, it all becomes anhydrous sodium carbonate.

I just mentioned the saturated sodium carbonate solution, and I would like to make a small suggestion on the preparation method. Break sodium carbonate into powder before putting it in water. In addition, be patient, after adding sodium carbonate powder, it is likely to sink to the bottom of the beaker, but this does not mean that it is saturated, and it will take time to dissolve.

In fact, there are three types of sodium carbonate with crystalline water: Na2CO3·H2O, Na2CO3·7H2O and Na2CO3·10H2O.

It can be considered that it is 10 sodium carbonate water.

Thank you, I hope it helps. I just finished the college entrance examination!

Speaking of sodium carbonate alone, it can be said that there are crystals and powders.

Weathering. 10 sodium carbonate (crystal) hydrate - anhydrous sodium carbonate (powder).

The reaction is a chemical reaction).

Na2CO3 is a colorless powder, and Na2CO3·10H2O is a colorless crystal.

Chemical formula and chemical properties

1. Thermal stability: sodium carbonate does not decompose when heated, and sodium bicarbonate is easy to decompose into sodium carbonate, water and carbon dioxide when heated;

2. Water solubility: the solubility of sodium carbonate is greater than that of sodium bicarbonate;

3. Reaction with carbon dioxide: sodium carbonate can be combined with carbon dioxide (with water) to form sodium bicarbonate, while sodium bicarbonate does not react;

4. Reaction with sodium hydroxide: sodium bicarbonate can react with sodium hydroxide to produce sodium carbonate and water, while sodium bicarbonate does not react;

5. Reaction with calcium chloride: sodium carbonate and calcium chloride (or barium chloride) solution are easy to generate carbonate precipitation, while sodium bicarbonate and salt dilute solution are not easy to form precipitation 6. Reaction with phenol: sodium carbonate can react with phenol to form sodium phenol and sodium bicarbonate, while sodium bicarbonate does not react with phenol.

Sodium carbonate is a positive salt, sodium bicarbonate is an acid salt, 2, sodium carbonate has greater solubility than sodium bicarbonate.

3. Sodium bicarbonate will decompose and become sodium carbonate after heating, water, carbon dioxide sodium carbonate will not decompose after heating.

4. Sodium carbonate is a white powdery solid, and sodium bicarbonate is a white granular crystal Na2CO3, also known as soda ash, commonly known as soda. Anhydrous sodium carbonate is a white powder or fine particle that melts without decomposing when heated to 851. Na2CO3 is easily soluble in water and is exothermic when dissolved.

Since Na2CO3 is a strong base and weak salt, its aqueous solution is alkaline. When sodium carbonate exists as hydrate, there are Na2CO3·H2O, Na2CO3·7H2O, Na2CO3·10H2O, and the daily edible alkali is mainly sodium chlorahydrate, commonly known as washing alkali. Na2CO3 exists in saline-alkali lakes in China's interior, and at low temperatures, crystals will be precipitated on the lake surface, called trona.

The transparent crystalline sodium chlorahydrate is easy to lose the crystalline water in dry air and turn into powder, mainly converted into sodium carbonate monohydrate. Sodium carbonate is very hygroscopic and can form hard lumps after moisture absorption. The largest use of sodium carbonate is in glassmaking, and it is also an important raw material for papermaking, soap, detergent, textile, tanning, petroleum, dyes, food and other industries.

In industry, soda ash can replace sodium hydroxide to neutralize acid, and it is used as a flux in the metallurgical industry, as a softener in water purification, as a degreaser on the surface of mechanical parts, and other compounds used to make sodium. Sodium carbonate can be obtained from natural minerals (sodalite Na2CO3·NaHCO3·2H2O, also known as trona), and more from ammonia, carbon dioxide and saturated salt water as raw materials.

NaHCO3 is commonly known as baking soda, also known as raw sodium carbonate or dialkali or acid sodium carbonate. It is a white powder, the solubility in water is slightly smaller than sodium carbonate, the aqueous solution is slightly alkaline, and the solid sodium bicarbonate decomposes when heated. NaHCO3 is the main ingredient of baking powder, and is also used as a raw material for making fire extinguishing agents, baking powders or soft drinks, and as a foaming agent in the rubber industry.

Sodium bicarbonate can be prepared by absorbing CO2 from sodium carbonate solution or crystalline sodium carbonate, which is also an intermediate product of ammonia-alkali soda ash production.

Generally speaking, the thermal stability of carbonic acid and carbonate has the following rules:

1) H2CO3 MHCo3 M2CO3 (M is an alkali metal).

2) Carbonates of the same main group of elements (e.g. alkali metal elements): Li2CO3, Na2CO3, K2CO3, RB2CO3

3) Alkali metal carbonates Alkaline earth metal carbonates Transition metal carbonates are different in many aspects of chemical properties.

Like what. Solubility: Under the same conditions, the solubility of sodium carbonate is much greater than that of sodium bicarbonate.

Thermal stability: Sodium carbonate is much more thermally stable than sodium bicarbonate.

Reaction rate with acid: Sodium carbonate reacts slower than sodium bicarbonate It only becomes faster when it reacts to produce sodium bicarbonate.

pH: The alkalinity of sodium carbonate is much stronger than that of sodium bicarbonate at the same concentration of the substance.

Degree of hydrolysis: The degree of hydrolysis of equivalent sodium carbonate is greater than that of sodium bicarbonate.

It reacts with concentrated barium chloride to produce BaCO3+NaCl+H2O, and reacts with concentrated CaCl2 to produce CaCO3+NaCl+H2O

Sodium carbonate is a positive salt, and sodium bicarbonate is an acid salt.

will react. A small amount of hydrocarbon is ionized into hydrogen ions and carbonate, so it does not react with the "very thin" barium chloride and calcium chloride solution, but when it is with a concentrated solution, a small amount of carbonate will react with barium ions and calcium ions.

Sodium carbonate is more alkaline than sodium bicarbonate.

The differences between sodium carbonate and sodium bicarbonate are as follows:

1. The names of sodium carbonate and sodium bicarbonate are different, sodium bicarbonate (NaHCO3) is commonly known as baking soda, also known as sodium carbonate or acid sodium carbonate; Sodium carbonate (Na2CO3) is known as soda ash and is commonly known as soda.

2. The shape of sodium carbonate and sodium bicarbonate is different, sodium carbonate is generally white odorless powder or granules at room temperature, and sodium bicarbonate is a white crystal, or an opaque monoclinic crystal system fine crystal.

3. The pH and water solubility of sodium carbonate and sodium bicarbonate are different, sodium carbonate is easily soluble in water and glycerol, slightly soluble in anhydrous ethanol, and insoluble in propanol; Sodium bicarbonate is soluble in water, slightly soluble in ethanol, soluble in ten parts water at 25 degrees Celsius, and soluble in twelve parts water at eighteen degrees Celsius.

4. The chemical properties of sodium carbonate and sodium bicarbonate are different, the aqueous solution of sodium carbonate is strongly alkaline and has a certain degree of corrosiveness, which can meta-decompose with acid and has strong stability, but it can also be decomposed at high temperature to generate sodium oxide and carbon dioxide; Sodium bicarbonate is a weak base and is an absorbent antacid that can quickly neutralize gastric acid.

5. The reaction of sodium carbonate and sodium bicarbonate is different when heated, sodium bicarbonate is unstable, easy to decompose when heated, and solid sodium bicarbonate decomposes immediately when heated; When sodium carbonate is heated to 815 degrees Celsius, it melts and does not decompose, with strong stability and is not easy to decompose when heated.

The two can be used universally when preparing the solution, and the crystal water can be deducted, so the two are not the same, anhydrous sodium carbonate.

It does not contain crystalline water, sodium carbonate [chemical formula] Na2CO3 [molecular weight], block alkali, soda ash.

Soda (soda) and soba (historically, it was generally transported to the whole country through Zhangjiakou and Gubeikou, so there is also the saying of "soda".) ), alkali noodles (edible alkali, the industrial name of non-crystalline water is light alkali, and the industrial name of one crystalline water is heavy alkali [Na2CO3 anhydrous sodium carbonate)

This product is a white powder; Odorless; Exposed in the air, there is deliquescent. This product is soluble in water and insoluble in alcohol.

Question 1: What is sodium hydroxide, anhydrous sodium carbonate? Can you still use a pot of sodium hydroxide perhydroxide and anhydrous sodium carbonate to cook after washing? Of course, you can add some vinegar.

Question 2: Is sodium carbonate and anhydrous sodium carbonate the same The two can be used universally when preparing the solution, and the crystal water can be deducted, so the two are different, and the anhydrous sodium carbonate does not contain crystalline water sodium carbonate [chemical formula] Na2CO3 [molecular weight].

Lump alkali, soda ash, soda (soda), mouth alkali (historically, generally transported to the whole country through Zhangjiakou and Gubeikou, so there is also a "mouth alkali" said.) ), alkali noodles (edible alkali, the industrial name of non-crystalline water is light alkali, and the industrial name of one crystalline water is heavy alkali [Na2CO3 anhydrous sodium carbonate)

This product is a white powder; Odorless; Exposed in the air, there is deliquescent. This product is soluble in water and insoluble in alcohol.

Question 3: What kind of drugs should be used to obtain anhydrous sodium carbonate Microwave drying Changsha Longtai microwave thermal industry****.

Question 4: Is anhydrous sodium carbonate toxic? Is it corrosive?。。

Please answer in detail What is the half-lethal dose (30 days) 5 points Non-toxic. Soda is a transliteration of SODA with the chemical formula Na2CO3. It has many names, the scientific name is sodium carbonate, and the common name is soda ash or baking soda powder in addition to soda.

The soda water that is often drunk is the aqueous solution of sodium carbonate.

Question 5: What is sodium hydroxide, anhydrous sodium carbonate? Can you still use a pot of sodium hydroxide perhydroxide and anhydrous sodium carbonate to cook after washing? Of course, you can add some vinegar.

Question 6: Is anhydrous sodium carbonate toxic? Is it corrosive?。。

Please answer in detail What is the half-lethal dose (30 days) 5 points Non-toxic. Soda is a transliteration of SODA with the chemical formula Na2CO3. It has many names, the scientific name is sodium carbonate, and the common name is soda ash or baking soda powder in addition to soda.

The soda water that is often drunk is the aqueous solution of sodium carbonate.

Question 7: Is anhydrous sodium carbonate soda ash? Chemically it belongs to salt, a strong alkaline salt, and not to a base. It is often referred to as soda ash in life.

Question 8: What is the purpose of adding anhydrous sodium carbonate powder to A? What is A?

Summary. Soda ash and sodium carbonate decahydrate are both carbonate compounds, but they have the following differences:1

The chemical formula is different, the chemical formula of soda ash is Na2CO3, while the chemical formula of sodium carbonate decahydrate is Na2CO3· The crystal structure is different, soda ash is anhydrous crystal, while sodium chlorahydrate is decahydrate crystal.

Soda ash and sodium carbonate decahydrate are both carbonate compounds, but they have the following differences:1The chemical formula is different, the chemical formula of soda ash is Na2CO3, while the chemical formula of sodium carbonate decahydrate is Na2CO3· The crystals are ominous in their fibers, soda ash is anhydrous crystals, and sodium chlorahydrate is decahydrate crystals.

Can sodium carbonate decahydrate replace soda ash.

Although sodium carbonate and soda ash are both carbonate compounds, their chemical properties and uses are different in the early Min period. In some cases, sodium carbonate decahydrate can be bridged to replace soda ash, while in others it cannot. For example, in the manufacture of detergents, sodium carbonate decahydrate can replace soda ash as an alkaline substance because of its high solubility and cleaning ability.

However, in the glass, paper and other industries, due to the higher purity and corrosiveness of soda ash, sodium carbonate decahydrate cannot replace its application.

Dear, do you still have any questions, or do you have anything you don't understand?

Why can he have an alkali content?

Same indicator.

If two chemical reagents have the same chemistry and purpose, but one of them has a higher alkali content, then Penitence can be considered to perform better to a certain extent. Therefore, in actual production and use, the selection of chemical reagents with higher alkali content may obtain better results. However, it is not always necessary to choose a chemical agent with the highest alkali content.

In some application scenarios, such as the preparation of specific pharmaceuticals or fine chemical products, it is necessary to select chemical Yukuo reagents with strict requirements such as specific purity and crystalline form. At this point, alkali content is not the only consideration. Bright in front of the town.