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Aluminium sulfate is rarely, if ever, encountered as the anhydrous salt. It forms a number of different hydrates, of which the hexadecahydrate Al 2 (SO 4) 3 ·16H 2 O and octadecahydrate Al 2 (SO 4) 3 ·18H 2 O are the most common. The heptadecahydrate, whose formula can be written as [Al(H 2 O) 6] 2 (SO 4) 3 ·5H 2 O, occurs naturally as the ...
3 3 C 5 H 12: n-pentane: amyl hydride; Skellysolve A 6 5 5 C 6 H 14: n-hexane: dipropyl; Gettysolve-B; hexyl hydride; Skellysolve B 7 9 11 C 7 H 16: n-heptane: dipropyl methane; Gettysolve-C; heptyl hydride; Skellysolve C 8 18 24 C 8 H 18: n-octane: dibutyl; octyl hydride 9 35 55 C 9 H 20: n-nonane: nonyl hydride; Shellsol 140 10 75 136 C 10 H ...
A pseudo alum is a double sulfate of the typical formula X SO 4 · Y 2 (SO 4) 3 ·22 H 2 O, such that X is a divalent metal ion, such as cobalt , manganese , magnesium (pickingerite) or iron (halotrichite or feather alum), and Y is a trivalent metal ion. [36] Double sulfates with the general formula X 2 SO 4 · Y 2 (SO 4) 3 ·24 H
The following chart shows the solubility of various ionic compounds in water at 1 atm pressure and room temperature (approx. 25 °C, 298.15 K). "Soluble" means the ionic compound doesn't precipitate, while "slightly soluble" and "insoluble" mean that a solid will precipitate; "slightly soluble" compounds like calcium sulfate may require heat to precipitate.
Potassium alum, potash alum, or potassium aluminium sulfate is a chemical compound first mentioned under various Sanskrit names in Ayurvedic medicinal texts such as charak samhita, sushrut samhita, and ashtang hridaya; is chemically defined as the double sulfate of potassium and aluminium, with chemical formula KAl(SO 4) 2.
The only stable chalcogenides under normal conditions are aluminium sulfide (Al 2 S 3), selenide (Al 2 Se 3), and telluride (Al 2 Te 3). All three are prepared by direct reaction of their elements at about 1,000 °C (1,832 °F) and quickly hydrolyse completely in water to yield aluminium hydroxide and the respective hydrogen chalcogenide .
Sodium aluminium sulfate is the inorganic compound with the chemical formula NaAl(SO 4) 2 ·12H 2 O (sometimes written Na 2 SO 4 ·Al 2 (SO 4) 3 ·24H 2 O). Also known as soda alum, sodium alum, or SAS, this white solid is used in the manufacture of baking powder and as a food additive. Its official mineral name is alum-Na (IMA symbol: Aum-Na [3]).
One such approach counts the number of water molecules bound to the compound more strongly (by 13.3 kcal/mol or more) than they are bound to other water molecules. [3] Hydration number estimates are not limited to integer values (for instance, estimates for sodium include 4, 4.6, 5.3, 5.5, 5.6, 6, 6.5, and 8), with some of the spread of ...