Where does cobalt chloride come from?
Cobalt(II) chloride can be prepared in its anhydrous form from cobalt metal and chlorine gas: Co(s) + Cl2(g) → CoCl2(s) The hydrated form can be prepared from cobalt(II) hydroxide or cobalt(II) carbonate and hydrochloric acid.
What is the common name of cobalt chloride?
Cobalt(II) chloride
| Names | |
|---|---|
| IUPAC name Cobalt(II) chloride | |
| Other names Cobaltous chloride Cobalt dichloride Muriate of cobalt | |
| Identifiers | |
| CAS Number | 7646-79-9 16544-92-6 (dihydrate) 7791-13-1 (hexahydrate) |
Where is cobalt chloride used?
Commercially, cobalt (II) chloride is often used to make sealants, adhesives, and glues. It is also used for electroplating, particularly for plating objects with cobalt metal. Surface treating metal is another common industrial use of the compound.
Does cobalt II chloride exist?
Cobalt(II) chloride, also known as cobaltous chloride and cobalt dichloride, is a chemical compound. It contains cobalt in its +2 oxidation state. Its chemical formula is CoCl2. It contains cobalt and chloride ions.
Is there a separate purple form of cobalt chloride?
How is the cobalt chloride changing? Well, its structure rearranges. First the purple dihydrate, CoCl2. 2H2O, forms and then at higher humidity the pink hexahydrate CoCl2.
Is cobalt chloride safe?
Toxicity Cobalt chloride is only moderately toxic by ingestion although a 19 month-old child died some six hours after allegedly drinking only 30 mL (Jacobziner and Raybin, 1961). In another report a six year-old developed only transient gastrointestinal upset after ingesting 2.5 g (Mucklow et al, 1990).
Why is cobalt chloride pink?
Processes description. The cobalt chloride changes color because the salt in the solution dissociates into ions. Cobalt ions are hydrated in the solution and have a pink color. Adding concentrated hydrochloric acid to the solution changes the color of the solution to bluish-purple.
Is there a separate purple form of cobalt chloride explain?
This solution is purple because it has appreciable amounts of both the pink and blue ions.
Why does cobalt chloride turn pink?
Why is cobalt hexahydrate pink?
Positive ions attract negative particles such as chloride ions (Cl-) and the oxygen end of water molecules (H2O) sine the oxygen in in water has a partial negative charge. When most of the negative species around the cobalt ion are water molecules, the ion absorbs light so that it appears pink.
Is cobalt chloride toxic to humans?
Is cobalt chloride a carcinogen?
Cobalt chloride (CAS No. 7646-79-9) is classified as hazardous: Category 2 carcinogenic substance, with the risk phrase ‘May cause cancer by inhalation’ (T; R49) in HSIS (Safe Work Australia).