Chemical properties of aluminum sulfate

Easily soluble in water, aluminum sulfate can not be dissolved in pure sulfuric acid (only coexist), in sulfuric acid solution with sulfuric acid dissolved in water together, so that the solubility of aluminum sulfate in sulfuric acid is aluminum sulfate solubility in water.

Room temperature, precipitated with 18 molecules of water of crystallization, aluminum sulfate of 18, mostly industrial production of aluminum sulfate 18. Anhydrous aluminum sulfate containing 51.3% is not even 100 ℃ autolysis (dissolved its crystalline water).

Aluminum sulfate difficult to weathering and lose crystal water, relatively stable, the heating will be dehydration, heat will break down into alumina and sulfur oxides. Aluminum sulfate was heated to 770 ℃ decomposition starting alumina, sulfur trioxide, sulfur dioxide and water vapor. Soluble in water, acid and alkali, insoluble in ethanol. Acidic aqueous solution. After hydrolysis of aluminum hydroxide. Boiling water for a long time to generate basic aluminum sulfate. Industrial is white flake, granular or lumpy, because while with pale green with low iron, because iron is oxidized low leaving the surface yellow. Crude off-white fine crystalline structure of porous substance. Non-toxic, dust can irritate the eyes.

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