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Soda, Baking soda and Sodium thiosulfate(Big soda)

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Many people have doubts, big soda and baking soda What is the difference? What is the relationship between soda and them?

In fact, this is three different substances, the following details:


Soda is the transliteration of Soda, the chemical formula is Na2CO3. Scientific name sodium carbonate, common name in addition to called soda, also known as soda ash or soda powder.

Anhydrous sodium carbonate is white powder or fine particles, soluble in water, aqueous solution was alkaline. It has a strong hygroscopicity, in the air can absorb moisture and become lumps.

Among the three kind of soda, the most widely used sodium carbonate It is a very important chemical products, glass, soap, textile, paper, leather and other important raw materials. Metallurgical industry and purified water are also used it. It can also be used for the manufacture of other sodium compounds.

2.Baking soda

The chemical formula of baking soda is NaHCO3. Scientific name sodium bicarbonate, common name baking soda.

Baking soda is a white crystal, soluble in water, aqueous solution was weakly alkaline. In hot air, it can slowly decompose, release part of the carbon dioxide; heated to 270 ° C when the decomposition of all the release of carbon dioxide.

2NaHCO3 == Na2CO3 + H2O + CO2 ↑

There are many important uses in the production and life of baking soda. In the fire industry, it is one of the raw materials for producing carbon dioxide; in the food industry, it is a major raw material for baking powder; it is also a commonly used raw material in the manufacture of refreshing drinks; in medicine, it is the treatment of gastric acid too much.

3.Sodium thiosulfate(Big soda)

Soda is the common name of sodium thiosulfate, also known as Haibo (Hypo transliteration), with five crystal water (Na2S2O3 • 5H2O), it is also known as sodium pentahydrate.

 Sodium thiosulfate pentahydrate is a colorless transparent crystal, soluble in water, aqueous solution was weak alkaline. It is in the dry air above 33 ℃ weathering and loss of crystal water. In the neutral, alkaline solution is more stable, in the acidic solution will be quickly decomposed.

Sodium thiosulfate has a strong ability to complex, with silver bromide can form complexes. It can be used as fixer.

sodium hyposulphite also has a strong reduction, chlorine and other substances can be reduced.

It can also be used as a dewaxing agent for cotton fabric bleaching. Similarly, the iodine stains on the fabric can also be used to remove it.

In addition, baking soda is also used for tanning leather, electroplating and extraction of silver from ore.

Tips: Which soda water inside the soda?

Soda water is sodium bicarbonate (baking soda) aqueous solution, containing weak alkaline, medical topical disinfection can be sterilized, drinking and neutralization of the body's acid-base balance, change the acidic body. Most of the soda water sold on the market is a synthetic carbonated beverage that is compressed into purified water and added sweeteners and fragrances.

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