Talk:Cobalt(II) chloride

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Untitled[edit]

where can wa find cobalt chloride?

It depends what you mean by "find". It doesn't occur as a mineral on a large scale, though it is probably present as an impurity in things like eriochalcite (copper(II) chloride). If you want to buy cobalt chloride, see the suppliers/manufacturers on the main article page. Walkerma 15:40, 28 September 2005 (UTC)[reply]

Cobalt(III) Chloride[edit]

My understanding of electrochemistry is somewhat limited, but it would seem that as the reduction potential for Co³⁺ + e^- → Co²⁺ is more positive (+1.92 V) than that for Cl₂ + 2e^- → 2Cl^- (+1.36 V), Co³⁺ would oxidize chloride to chlorine, preventing the formation of CoCl₃ and other Co³⁺ halides other than the fluoride.

Is my reasoning correct (could the compound exist, but just be unstable?) and if so, should this be noted in the article as a reason for why CoCl₃ has not been isolated? --Pyrochem 17:10, 21 July 2007 (UTC)[reply]

Please don't place original research in the articles (see WP:OR)
I've removed this "The reduction potential for Co³⁺ + e⁻ → Co²⁺ is more favorable (+1.92 V) than the reduction Cl₂ to Cl⁻ (+1.36 V). This analysis suggests also that the naked cation Co³⁺ would oxidize chloride to chlorine, precluding the formation of CoCl₃. "
Comment the electrode potential is for hexaaaquacobalt ions, this may no apply in the presence of other ligands.

Well cobalt iii hydroxide exists. is a brown powder. Wikipedia has it.
so what is basic cobalt(iii) chloride? does that exist from cobalt(iii) hydroxide?
and what happens if one actually takes 1mol chlorine Cl2 and 2mol CoCl2? chlorides dissolve in acl or not? pressure. Temperature. take 50g.... maybe it decomposes way down room temperature. so: p, T of CoCl2+CL. diagram. finished. always heat before set. Wikistallion (talk) 15:54, 28 December 2018 (UTC)[reply]

See cobalt(III) chloride. The compound seems unstable under ordinary circumstances (and most textbooks say that it does not exist), but apparently it can be observed in special conditions, such as in gas form over molten CoCl
₂ in a Cl
₂ atmosphere, or embedded in frozen argon. --Jorge Stolfi (talk) 20:14, 29 January 2019 (UTC)[reply]

Uses[edit]

The "USES" section has this statement: "A common use for cobalt(II) chloride was for the detection of moisture, for example in drying agents such as silica gel." When was it used? Why is it no longer used? 70.249.216.206 (talk) 05:58, 11 October 2008 (UTC)[reply]

It is still used that way; the "was" is spurious. I've made the change. 67.158.70.58 (talk) 18:18, 12 October 2008 (UTC)[reply]

Reactions[edit]

Imho the line

....And the anionic complex CoCl22−:[4]

should read CoCl42−

158.64.42.15 (talk) 12:39, 23 May 2011 (UTC)[reply]

== Problem with the test tube illustration

http://upload.wikimedia.org/wikipedia/commons/3/30/Tetrachlorocobaltate_aqueous_ion.jpg

is a cropped section of the illustration on the nickel page:

http://upload.wikimedia.org/wikipedia/commons/thumb/f/ff/Color_of_various_Ni%28II%29_complexes_in_aqueous_solution.jpg/400px-Color_of_various_Ni%28II%29_complexes_in_aqueous_solution.jpg

The same source, LHcheM, uploaded both images, and labeled one as containing nickel and one as containing cobalt. Which is it? One of the articles must be wrong.

2601:A:5200:771:80E6:3978:AF13:CA29 (talk) 18:56, 27 July 2014 (UTC)[reply]

External links modified[edit]

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Unclear section[edit]

I moved this section here for dicussion.

The NZ National Film Unit ''PICTORIAL PARADE No. 23'' features cobalt chloride as the missing component in the pumicelands near Rotorua. Without this compound, no cattle would be able to survive on this land—only wild horses. [http://audiovisual.archives.govt.nz/wiki/index.php/PICTORIAL_PARADE_No._23]

The cited reference doesn't contain any text that mentions cobalt. If cobalt has indeed been used to increase the fertility of land in some way, I think a reference in a scientific journal would be a more ideal reference. ChemNerd (talk) 21:01, 26 September 2017 (UTC)[reply]