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Calcium sulfate (or calcium sulphate) ... The details of the temperature and time depend on ambient humidity. Temperatures as high as 170 °C (338 °F) are used in ...
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.
The tables below provides information on the variation of solubility of different substances (mostly inorganic compounds) in water with temperature, at one atmosphere pressure. Units of solubility are given in grams of substance per 100 millilitres of water (g/(100 mL)), unless shown otherwise.
English: The temperature dependence of the solubility of calcium sulfate in pure water. 3 phases are marked: gypsum (calcium sulfate dihydrate), hemihydrate (plaster of Paris), and anhydrite. Data source: "The ASME Handbook on Water Technology for Thermal Power Systems", Paul Cohen (ed), American Society of Mechanical Engineers, 1989.
A few, such as calcium sulfate and cerium(III) sulfate, become less soluble in water as temperature increases (ΔH < 0). [15] This is also the case for calcium hydroxide (portlandite), whose solubility at 70 °C is about half of its value at 25 °C. The dissolution of calcium hydroxide in water is also an exothermic process (ΔH < 0
Even Florida has seen a subzero temperature with Tallahassee dropping to minus 2 degrees during the most brutal U.S. cold outbreak on record in Feb. 1899. Montana is the coldest in continental U.S ...
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Upping daily calcium intake may lower colorectal cancer risk by 17% For this study, researchers analyzed dietary data from more than 542,000 women who participated in the Million Women Study .