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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
In 1998, the European Community (EC) issued a directive which classifies items containing cobalt(II) chloride of 0.01 to 1% w/w as T (Toxic), with the corresponding R phrase of R49 (may cause cancer if inhaled). As a consequence, new cobalt-free humidity indicator cards have been developed by some companies.
Cobalt(III) chloride or cobaltic chloride is an unstable and elusive compound of cobalt and chlorine with formula CoCl 3. In this compound, the cobalt atoms have a formal charge of +3. [1] The compound has been reported to exist in the gas phase at high temperatures, in equilibrium with cobalt(II) chloride and chlorine gas.
Addition of sodium chloride reduces the solubility of the soap salts. The soaps precipitate due to a combination of common-ion effect and increased ionic strength . Sea, brackish and other waters that contain appreciable amount of sodium ions (Na + ) interfere with the normal behavior of soap because of common-ion effect.
However, the equilibrium constant for the loss of two protons applies equally well to the equilibrium [M(H 2 O) n] z+ - 2 H + ⇌ [MO(H 2 O) n-2] (z-2)+ + H 2 O. because the concentration of water is assumed to be constant. This applies in general: any equilibrium constant is equally valid for a product with an oxide ion as for the product with ...
Cobalt chloride (cobalt paper) may refer to: Cobalt(II) chloride (CoCl 2) Cobalt(III) chloride (CoCl 3 This page was last edited on 21 February ...
An equilibrium constant is related to the standard Gibbs free energy change for the reaction = R is the gas constant and T is the absolute temperature. At 25 °C, ΔG ⊖ = (−5.708 kJ mol −1) ⋅ log β. Free energy is made up of an enthalpy term and an entropy term.
The ammines of chromium(III) and cobalt(III) are of historic significance. Both families of ammines are relatively inert kinetically, which allows the separation of isomers. [ 11 ] For example, tetraamminedichlorochromium(III) chloride, [Cr(NH 3 ) 4 Cl 2 ]Cl , has two forms - the cis isomer is violet, while the trans isomer is green.