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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. In a commercial sense, it is one of the most important barium compounds. [5]
Barium azide – Ba(N 3) 2 [84] Barium bromide – BaBr 2; Barium carbonate – BaCO 3 [85] Barium chlorate – Ba(ClO 3) 2 [86] Barium chloride – BaCl 2 [87] Barium chromate – BaCrO 4 [88] Barium ferrate – BaFeO 4; Barium ferrite – BaFe 12 O 19 [89] Barium fluoride – BaF 2 [90] Barium hydroxide – Ba(OH) 2 [91] [92] Barium iodide ...
Oxidized barium. Barium is a soft, silvery-white metal, with a slight golden shade when ultrapure. [9]: 2 The silvery-white color of barium metal rapidly vanishes upon oxidation in air yielding a dark gray layer containing the oxide. Barium has a medium specific weight and high electrical conductivity. Because barium is difficult to purify ...
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.
Barium acetate is generally produced by the reaction of acetic acid with barium carbonate: [2] BaCO 3 + 2 CH 3 COOH → (CH 3 COO) 2 Ba + CO 2 + H 2 O. The reaction is performed in solution and the barium acetate crystalizes out at temperatures above 41 °C. Between 25 and 40 °C, the monohydrate version crystalizes. Alternatively, barium ...
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).
The melting point of a substance is the point where it changes state from solid to liquid while the boiling point of a substance (in liquid state) is the point where the vapour pressure of the liquid equals the environmental pressure surrounding the liquid [102] [103] and all the liquid changes state to gas.
Like strontium and barium, as well as the alkali metals and the divalent lanthanides europium and ytterbium, calcium metal dissolves directly in liquid ammonia to give a dark blue solution. [20] Due to the large size of the calcium ion (Ca 2+), high coordination numbers are common, up to 24 in some intermetallic compounds such as CaZn 13. [21]