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What is an alum stone?
An alum stone is a subsulphate of alumina and potash - also known as alunite.
How alum formed?
Alum is a chemical compound of two distinct salts, namely: Sulphate of alumina and sulphate of potassa, or sulphate of alumina and sulphate of ammonia. The last salt is present only in a few varieties, and other specimens contain a soda salt with the salt of alumina, and still others substitute an iron salt for alumina. The following symbols represent the more familiar specimens:Roman or Rock Alum. KO.SO3+Al2O3+24HO. Ammonia Alum. NH~O.SO3+AI2O3+24HO. Iron Alum. KO. SO3+Fe203+24HO. The proportion of water is thus seen to remain uniform through them all, while the characterizing salt is a tersulphate of a sesquioxide.Rock Alum is the one used in medicine. It is found in a nearly pure state in the volcanic region of Italy, and is purified by solution and subsequent crystallization. The almun ores are certain slaty earths, from which the alum is manufactured by calcination, exposure to the air for three months, and subsequent lixiviation and crystalyzation. Burnt Alum is merely alum deprived of its water by heat. It is powdered and sprinkled upon fungous flesh, acting as a very mild escharotic.
What is the difference between alumina hydrate and alumina trihydrate?
Nothing... Alumina hydrate has many names, alumina trihydrate being one of them. The other names are as follows: Aluminum hydrate; Aluminum trihydrate; Aluminum (III) hydroxide; Amorphous alumina; Trihydroxyaluminum
Is borax and potassium alum the same thing?
No, borax and potassium alum are not the same thing. Borax is a naturally occurring mineral composed of sodium, boron, oxygen, and water, while potassium alum is a type of alum that contains aluminum and potassium. They have different chemical compositions and are used for different purposes.
What is difference between calcined alumina and alumina hydrate?
Calcined alumina is produced by heating alumina hydrate to high temperatures, which removes the chemically bonded water and results in a more pure form of alumina. Alumina hydrate, on the other hand, contains chemically bonded water molecules and is typically used as a flame retardant or filler material due to its lower processing temperature and cost effectiveness.
What is the formula alum?
Alum is the old-fashioned name for potassium aluminum sulfate, and the formula is KAl(SO4)2. There will also be some water of crystallization attached to it, and there are some variations on that formula because there are different types of alum.
What is difference between feeric alum and non ferric alum?
Ferric alum contains iron, which gives it a yellow color, while non-ferric alum does not contain iron and is typically colorless. Ferric alum is commonly used in water purification and wastewater treatment processes, while non-ferric alum is used in industries like paper manufacturing and tanning.
WHAT IS ACTIVATED ALUMINA?
Activated alumina is a type of porous alumina with a very high surface area.
What chemical formula of the Alum?
Alum is both a specific chemical compound and a class of chemical compounds. The specific compound is the hydrated potassium aluminum sulfate with the formula KAl(SO4)2.12H2O. The wider class of compounds known as alums have the related stoichiometry, AB(SO4)2.12H2O
What metal is extracted from alumina?
Aluminium is extracted from alumina.
What is the difference between alpha and gamma alumina?
Alpha alumina has cubic crystal structure, and gamma - rhombohedral (i.e. it is a "skewed cubic") Due to their geometry the typical surface area of a particle is affected, and alpha alumina has fewer -OH groups than gamma alumina. Iron oxide can also have either alpha or gamma structure, and is described on wiki http://en.wikipedia.org/wiki/Iron(III)_oxide
Is epsom salt the same as alum?
No, Epsom salt (magnesium sulfate) and alum (potassium aluminum sulfate) are different compounds. Epsom salt is commonly used for soaking and muscle relaxation, while alum is often used as a deodorant or in pickling.
