04
Feb
Calcium Sulfide Solubility In Water. Calcium sulfide decomposes upon contact with water including moist air giving a mixture of CaSH 2 CaOH 2 and CaSHOH. Calcium sulfate dihydrate ACS grade. 218 15 gcm 3 s. 2000 C D density.
It reacts with acids such as hydrochloric acid to release toxic hydrogen sulfide gas. The solubility of CaSO 4 2H 2 O has been determined in aqueous NaCl solutions up to very high salinities in the pH range of 25 to 85 at 35 C. The solubility of calcium sulfate dihydrate increases from 0223 g100 ml at 0 C to about 0265 g100 ml at 40 C then decreases to 0205 g100 ml at 100 C. Calcium sulfate–water 12 DTXSID7047514. Addition of NaCl increased the solubility. Calcium sulfate dihydrate reagent.
SOLUBLE ANHYDRITE which is obtained by heating calcium sulfate dihydrate at a temperature below 300C has a high affinity for water and is used as a desiccant.
Calcium carbonate has a solubility of 14 mgL which is multiplied by a factor five in presence of carbon dioxide. For example insoluble anhydrite a dehydrated form of calcium sulfate dissolves slowly in water and does not absorb moisture from air. Review the solubility rules for common ionic compounds in water and download our solubility rules chart for easy reference. The solubility of calcium sulfate dihydrate CaSO42H2O was measured in NaCl and glycerol aqueous solution with the mass fraction of glycerol 080 and molality of NaCl 06 m in the temperature range of 30315 to 34315 K and atmospheric pressure. Soluble anhydrite absorbs water to form calcium sulfate hemihydrate Plaster of Paris. KsOCaS0312H20 aCa2 x aS032 was determined by the authorsa to be 10-651 31 x 10-7 mol2 dm-6.