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calcium hydroxide |
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calcium hydroxide, Ca(OH)2, colorless crystal or white powder. It is prepared by reacting calcium oxide calcium oxide, chemical compound, CaO, a colorless, cubic crystalline or white amorphous substance. It is also called lime, quicklime, or caustic lime, but commercial lime often contains impurities, e.g., silica, iron, alumina, and magnesia. ..... Click the link for more information. (lime) with water, a process called slaking, and is also known as hydrated lime or slaked lime. When heated above 580°C; it dehydrates, forming the oxide. Like the oxide, it has many uses, e.g., in liming liming (līm`ĭng), application to the soil of calcium in various forms, generally as ground limestone, but also as marl, chalk, ..... Click the link for more information. soil, in sugar refining, and in preparing other compounds. It is a strong base and is widely used as an inexpensive alkali, often as a suspension in water (milk of lime); it is used in leather tanning to remove hair from hides. It is used in whitewash whitewash, white fluid commonly used as an inexpensive, impermanent coating for walls, fences, stables, and other exterior structures. It varies in composition, being generally a mixture of lime (quicklime), water, flour, salt, glue, and whiting , with other ..... Click the link for more information. , mortar mortar, in building, mixture of lime or cement with sand and water, used as a bedding and adhesive between adjacent pieces of stone, brick, or other material in masonry construction. ..... Click the link for more information. , and plaster. It is only slightly soluble in water, about 0.2 grams per 100 cubic centimeters, so its solutions are weakly basic. Limewater is a clear, saturated water solution of calcium hydroxide. It is used in medicine to treat acid burns and as an antacid. Because calcium hydroxide readily reacts with carbon dioxide, CO2, to form calcium carbonate, a mixture of gases can be tested for the presence of CO2 by shaking it with limewater in a clear container; if CO2 is present, a cloudy calcium carbonate precipitate will form. |
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| Tests also detected hydrogen sulfide gas and hydrated lime was found on the property, he said. Unlike garden lime, hydrated lime (builder's lime) is heated to a high temperature (similar to cement) to change its molecular structure. Ohashi confirms this, but he points out that hydrated lime couldn't legally be used against frogs unless it were to receive federal approval as a pesticide. |
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hydrated lime
