Search results
Results from the WOW.Com Content Network
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. In a commercial sense, it is one of the most important barium compounds. [5]
Barium bromide – BaBr 2; Barium carbonate – BaCO 3 ... Ceric ammonium nitrate – (NH 4) 2 Ce(NO 3) 6; ... Water - H 2 O [204] He
25417–81–6 BaH 2: barium hydride: 13477–09–3 BaHgI 4: barium tetraiodomercurate: 10048–99–4 BaI 2: barium iodide: 13718–50–8 BaI 2 •2H 2 O: barium iodide dihydrate: 7787–33–9 BaMnO 4: barium manganate: 7787–35–1 Ba(MnO 4) 2: barium permanganate: 7787–36–2 BaMoO 4: barium molybdate: 7787–37–3 Ba(NO 2) 2: barium ...
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]
The water-soluble barium sulfide is the starting point for other compounds: treating BaS with oxygen produces the sulfate, with nitric acid the nitrate, with aqueous carbon dioxide the carbonate, and so on. [9]: 6 The nitrate can be thermally decomposed to yield the oxide. [9]: 6 Barium metal is produced by reduction with aluminium at 1,100 °C ...
Barium hydroxide is used in analytical chemistry for the titration of weak acids, particularly organic acids. Its aqueous solution, if clear, is guaranteed to be free of carbonate, unlike those of sodium hydroxide and potassium hydroxide, as barium carbonate is insoluble in water.
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 standard Gibbs free energy of formation (G f °) of a compound is the change of Gibbs free energy that accompanies the formation of 1 mole of a substance in its standard state from its constituent elements in their standard states (the most stable form of the element at 1 bar of pressure and the specified temperature, usually 298.15 K or 25 °C).