Physical and chemical properties of potash
Potash is one of the medium-volatile salts of carbonic acid. Purified potash looks like a crystalline white powder, odorless with alkaline taste. In raw form it has a slightly reddish hue due to the presence of impurities. Highly soluble in water, is not able to dissolve in ethanol. Aqueous solution of potash has a pronounced bactericidal action, and the higher the temperature, the stronger the antimicrobial action. The melting point of potassium carbonate is 891 degrees.
Aqueous solutions of potash at various concentrations able to dehydrate at a temperature of about 160 degrees. Are obtained colorless crystals of the monoclinic system. The aqueous solution may react with carbon dioxide and sulphur, forming bicarbonates and hydrosulfate respectively.
The history of the method of obtaining potash, is rooted in antiquity. This method consisted in the following: wood ash poured in a bowl and added hot water. The ash was obtained from trees that are rich in potassium. Then kindled the fire and poured the mixture on it. The fire must not go out, then the wood will precipitate the potash. It will have a reddish hue due to small amounts of impurities.
Today, potash is getting in the electrolytic interaction of magnesium carbonate in suspension with a solution of potassium chloride. There is another way. For its realization it is necessary to carbonize the potassium hydroxide solution in the electrolytic bath.
The application of potash
Due to its alkaline properties, the ancient Romans used potash for washing clothes. When reacting with water it forms an alkaline environment, is able to dissolve fats and remove stains. Nowadays, the use of potassium carbonate is much broader.
It is used as a dietary Supplement. It is called E501 and is used as a stabilizer. It helps to mix immiscible in the nature of the substances (water and oil). E501 is also used as an acidity regulator. It keeps the product a certain pH value, pH. Scientists had proved the harm of this Supplement for a person. Potash provokes allergic reactions and is particularly dangerous for asthma patients.
The alkaline nature of potassium carbonate allows its use in the soap industry, and for disinfection. It is added to cure eczema and other skin diseases for multiplying effect. This powder is processed livestock farms and stables.
Advice 2 : Potassium carbonate: what is it and where it is used
Potassium carbonate better known as potash. This substance is highly valued in the old days. In order to learn how to get it, required many years of labor. What is so useful potassium carbonate?
Physical and chemical properties of potassium carbonate
Potassium carbonate (potash, additive E501) is a white, crystalline powder, possessing a strong alkaline taste. It is very soluble in water, but practically insoluble in ethanol. When dissolved in water, the potassium carbonate produces a lot of heat. The higher the temperature of the solution, the more pronounced its alkaline properties.
Potassium carbonate can react with oxides of carbon and sulfur with the formation of hydrates. Such a reaction is only possible in an aqueous solution of this salt.
Obtaining potassium carbonate
In ancient times potash was obtained from trees which contain a lot of potassium (maple, birch, pine). To do this, the wood burned. From one cubic meter it was possible to obtain about 500 grams of potassium carbonate. There is another method: wood ash filled with hot water and poured the mixture on the burning firewood in the hearth. This procedure must be carried out so that the fire is not extinguished, then at the bottom of the hearth will be delayed potash.
Today, potash is produced by electrolysis of potassium chloride, at least with ash from seaweed. He and the other method allows you to get this stuff in industrial quantities.
The application of potassium carbonate
Potassium carbonate is known to man since time immemorial. Initially it was used for washing clothes as in an alkaline environment, which it creates, easily destroyed fats. Any stains disappear after the first wash. Soap factories use it in the manufacture of its products.
Potassium carbonate is also known as a food additive E501. It acts as emulsifier and acidity regulator, which makes baked goods fluffy. Were numerous disputes about the harm of this Supplement for the human body. It turned out that the calcium carbonate harmful to humans only in a suspended state. If contact with skin, possible local allergic reaction.
In agriculture, calcium carbonate is used as the disinfectant substance against various fungal diseases of plants and as fertilizer. It has a beneficial effect on the soil, drastically reducing its acidity, as the alkali. The soil becomes more fertile. Solution of potash treated with chicken coops and pigsties.
The alkaline nature of potassium carbonate allows its use in medicine. Often it is found in protivosudorozhnykh ointments and creams to enhance the therapeutic effect. Very effective treatments with this Supplement against parasites in the human body.