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Cobalt(II) sulfate is used in storage batteries and electroplating baths, sympathetic inks, and as an additive to soils and animal feeds. For these purposes, the cobalt sulfate is produced by treating cobalt oxide with sulfuric acid. [1] Being commonly available commercially, the heptahydrate is a routine source of cobalt in coordination ...
It is prepared by combining solutions cobaltous sulfate and sodium bicarbonate: CoSO 4 + 2 NaHCO 3 → CoCO 3 + Na 2 SO 4 + H 2 O + CO 2. This reaction is used in the precipitation of cobalt from an extract of its roasted ores. [5] CoCO 3 adopts a structure like calcite, consisting of cobalt in an octahedral coordination geometry. [7]
Cobalt(II) chloride is an inorganic compound, a salt of cobalt and chlorine, with the formula CoCl 2.The compound forms several hydrates CoCl 2 ·n H 2 O, for n = 1, 2, 6, and 9. . Claims of the formation of tri- and tetrahydrates have not been confirmed
Cobalt powder reacts with ammonia to form two kinds of nitrides, Co 2 N and Co 3 N. Cobalt reacts with phosphorus or arsenic to form Co 2 P, CoP, [2] CoP 2, [6] CoAs 2 and other substances. [2] The former three compounds are of interest as catalysts for water electrolysis. [6] [7] [8]
Cobalt(II) hydroxide or cobaltous hydroxide is the inorganic compound with the formula Co(OH) 2, consisting of divalent cobalt cations Co 2+ and hydroxide anions OH −. The pure compound, often called the "beta form" (β-Co(OH) 2) is a pink solid insoluble in water. [2] [3]
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pale red powder (anhydrous) red crystalline (hexahydrate) Odor: odorless Density: 1.87 g/cm 3 (hexahydrate) 2.49 g/cm 3 (anhydrous) Melting point: 100 °C (212 °F; 373 K) decomposes (anhydrous) 55 °C (hexahydrate) Boiling point: 100 to 105 °C (212 to 221 °F; 373 to 378 K) decomposes (anhydrous) [citation needed] 74 °C, decomposes (hexahydrate)
Cobalt(II) oxide is prepared by oxidation of cobalt powder with air or by thermal decomposition of cobalt(II) nitrate or the carbonate. [3] [4] Cobalt(II,III) oxide decomposes to cobalt(II) oxide at 950 °C: [7] 2 Co 3 O 4 → 6 CoO + O 2. It may also be prepared by precipitating the hydroxide, followed by thermal dehydration: [citation needed]