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where the solubility product for [Ca 2+][CO 2− 3] is given as anywhere from K sp = 3.7 × 10 −9 to K sp = 8.7 × 10 −9 at 25 °C, depending upon the data source. [ 80 ] [ 81 ] What the equation means is that the product of molar concentration of calcium ions ( moles of dissolved Ca 2+ per liter of solution) with the molar concentration of ...
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.
Calcium carbonate saturation can be determined using the following equation: Ω = ([Ca 2+][CO 3 2−])/K sp. where the numerator ([Ca 2+][CO 3 2−]) denotes the concentration of calcium and carbonate ions and the denominator (K sp) refers to the mineral (solid) phase stoichiometric solubility product of calcium carbonate. [8]
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.
CaCO 3 (s) + H 2 O + CO 2 (aq) → Ca 2+ (aq) + 2HCO − 3 (aq) If the amount of dissolved carbon dioxide drops, the reaction reverses to precipitate calcite. As a result, calcite can be either dissolved by groundwater or precipitated by groundwater, depending on such factors as the water temperature, pH, and dissolved ion concentrations. When ...
The solubility of a specific solute in a specific solvent is generally expressed as the concentration of a saturated solution of the two. [1] Any of the several ways of expressing concentration of solutions can be used, such as the mass, volume, or amount in moles of the solute for a specific mass, volume, or mole amount of the solvent or of the solution.
As it is less stable than either calcite, the most stable polymorph, [5] or aragonite, vaterite has a higher solubility than either of these phases. Therefore, once vaterite is exposed to water , it converts to calcite (at low temperature) or aragonite (at high temperature: ~60 °C).
Aragonite is a carbonate mineral and one of the three most common naturally occurring crystal forms of calcium carbonate (Ca CO 3), the others being calcite and vaterite.It is formed by biological and physical processes, including precipitation from marine and freshwater environments.