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Barium carbonate is the inorganic compound with the formula BaCO 3. Like most alkaline earth metal carbonates , it is a white salt that is poorly soluble in water. It occurs as the mineral known as witherite .
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.
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.
Barium carbonate: 8.09 Barium chromate: 9.62 (28 °C) Barium fluoride: 5.76 (25.8 °C) Barium iodate: 9.19 Barium oxalate: 6.66 (18 °C) Barium sulfate: 9.97 Cadmium oxalate: 7.82 (18 °C) Calcium carbonate: 8.06 Calcium fluoride: 10.40 (26 °C) Calcium iodate: 6.19 (18 °C) Calcium oxalate: 8.59 Calcium sulfate: 4.61 Calcium tartrate: 6.11 (18 ...
A bicarbonate salt forms when a positively charged ion attaches to the negatively charged oxygen atoms of the ion, forming an ionic compound. Many bicarbonates are soluble in water at standard temperature and pressure; in particular, sodium bicarbonate contributes to total dissolved solids, a common parameter for assessing water quality. [6]
Industrially, barium hydroxide is used as the precursor to other barium compounds. The monohydrate is used to dehydrate and remove sulfate from various products. [6] This application exploits the very low solubility of barium sulfate. This industrial application is also applied to laboratory uses.
Barium bromide can be prepared by treating barium sulfide or barium carbonate with hydrobromic acid: BaS + 2 HBr → BaBr 2 + H 2 S BaCO 3 + 2 HBr → BaBr 2 + CO 2 + H 2 O. Barium bromide crystallizes from concentrated aqueous solution in its dihydrate, BaBr 2 ·2H 2 O. Heating this dihydrate to 120 °C gives the anhydrous salt. [6]
Under the right conditions of temperature and/or pressure, H 2 O and CO 2(aq) molecules react to yield carbonic acid (H 2 CO 3) whose solubility increases at low temperature and high pressure. The slightest changes in pressure and temperature dissolves H 2 CO 3(aq) in water according to equation (3) to form hydronium and bicarbonate (HCO 3 − ...