Talk:Chlorine

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Article changed over to new Wikipedia:WikiProject Elements format by maveric149. Elementbox converted 10:59, 23 Jun 2005 by Femto (previous revision was that of 05:25, 23 Jun 2005).

Contents 1 Information Sources 2 Gas image 3 Chlorine-36 4 Chlorine + Alcohol = Explosion? 5 Looks like references are the order of the day here? 6 Safety (a.o.) 7 Diaphragm cell electrolysis 8 Modern use as a Chem. weapon? 9 Downgraded article quality 10 Chlorine as a chemical weapon 11 B-Class

[edit] Information Sources

Some of the text in this entry was rewritten from Los Alamos National Laboratory - Chlorine. Additional text was taken directly from, USGS Periodic Table - Chlorine, from the Elements database 20001107 (via dict.org), Webster's Revised Unabridged Dictionary (1913) (via dict.org) and WordNet (r) 1.7 (via dict.org). Data for the table was obtained from the sources listed on the main page and Wikipedia:WikiProject Elements but was reformatted and converted into SI units.

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[edit] Gas image

I noted the comment "gas, doesn't look like much" with the picture provided. The best pictures I've seen of chlorine are from leaking railroad cars. See http://www.hazmat101.com/, click on the 'files' link in the colored bar at the top and look at the power point file in the November 2003 section titled "Rail tank car chlorine leak photos". The last slide is especially good - the yellow-green color is particularly good. Also note the gas hanging to the ground and not pluming into the air.swc 21:30, 4 October 2005 (UTC)

[edit] Chlorine-36

The Cl-36 (³⁶Cl) info at [1] has several differences from that in [2]. (SEWilco 07:18, 12 May 2005 (UTC))

Subsurface production by muon capture of 40-Ca? Where do the muons come from in such scenario? --Shaddack 18:44, 23 November 2005 (UTC)

Muons are generated in the atmosphere due to reactions between cosmic rays and air molecules. Muons have a relatively low interaction cross section with matter and can penetrate quite deeply. Many underground neutrino detectors count only neutrinos coming from below (and thus having passed through a few thousand km of Earth) because there is too much muon background from above. Icek 19:40, 24 March 2007 (UTC)

[edit] Chlorine + Alcohol = Explosion?

Is this true? --Arima 02:03, 25 November 2005 (UTC)

Well, chlorine is a powerful oxidizing agent, and alcohol burns in an oxygen atmosphere, so I see no reason why it wouldn't burn in a chlorine atmosphere. I suppose you'd get alcohol to explode in chlorine the same way you'd get it to explode in oxygen: mix alcohol vapor or aerosolized alcohol with pure chlorine gas, then provide an ignition source. The required temperature might be low enough for spontaneous ignition at room temperature, but I don't know. --Carnildo 19:14, 25 November 2005 (UTC)

• You might be referring to that (in)famous video [3] where some young idiots have a plastic bottle in which they "add the chlorine to the alcohol" and "shake it up hella good" (and nearly kill themselves with the resulting explosion, it looks like). However, what they're probably using is the kind of so-called "chlorine" used in pools as disinfectant, which is actually sodium hypochlorite. And it does seem to explode pretty well. --Bob Mellish 19:38, 25 November 2005 (UTC)

• (Note: 206.131.130.132 (talk • contribs) edited my comment above to change sodium hyprochlorite to calcium hypochlorite, with the comment "Re-Corrected by SINYpyro."

1. Please don't change other people's comments on talk pages.
2. There are a number of bleach-type compounds commonly but incorrectly called "chlorine", including both calcium and sodium hypochlorite. --Bob Mellish 17:13, 13 March 2006 (UTC)

• I'ts sad how many people there are out there who change what people have written. I feel for you. --Ruff 04:06, 28 July 2006 (UTC)

• From the video, it appears to be some sort of pressure explosion, not combustion. Anyone know what the reaction/gas produced is?

• I have a feeling that it is hydrazine, but I'm not in the least sure. Ruff ^{Bark away!} 20:59, 25 August 2006 (UTC)

• Hydrazine is definately believable, a friend and I have been messing around with chlorine/alcohol quite a bit lately, and the resulting gas is highly flammable (like rocket fuel =]) I can also verify that it causes an explosion, but only because of the release of the gas, and I think it's a similar reaction to the chlorine/ammonia one that produces hydrazine.

Hydrazine is unlikely because there was no nitrogen compound involved in the experiment.

151.197.54.195 16:10, 24 February 2007 (UTC)

[edit] Looks like references are the order of the day here?

It seems to me the first task for the collaboration is references. I can see about asking my Chemistry teacher if he knows any good, you know, chemistry books that'll have a bunch of detail on Chlorine, because they'll probably just repeat what's already in this article yet it'll certainly go a long way. However, thinking about Chlorine, could not the more social aspects of chlorine be emphasized, you know, maybe a picture of a pool with chlorine used to keep it clean, more detail on how chlorine was sometimes used in gas form as a weapon of war in WW1 if I remember correctly, etc. etc., all that stuff kind of is notable for Chlorine after all. Homestarmy 21:36, 1 May 2006 (UTC)

I added some information about chlorine and WWI from the Use of poison gas in World War I article. It has an OK amount of info but there is still a long way to go. As a suggestion I think we should model it after some of these articles: Acetic acid Helium, Hydrochloric acid, Technetium. Tarret 00:31, 2 May 2006 (UTC)

[edit] Safety (a.o.)

This is an article about an important element, chlorine. It has been rated A-class. But it has accumulated much information which is anecdotal (mainly concerning safety, but also about external organizations/suppliers). As was done with aniline, hydrazine and hydrogen sulfide, much of that infomation has been removed, or compacted into one or two sentences. For more safety data one can consult an MSDS sheet. --Dirk Beetstra ^{T C} 22:15, 13 August 2006 (UTC)

[edit] Diaphragm cell electrolysis

The following request was placed on the main page by user 72.27.87.149 (talk) at 00:50, 6 February 2007. I'm moving it to the talk page (see below). Karl Hahn (T) (C) 13:57, 11 February 2007 (UTC)

Please give step by step method for this extraction process

1) The starting material is saturated brine (salt = NaCl solution), sometimes obtained by drilling a well into an underground salt dome and circulating water through this well. Ca and Mg contaminations are removed by precipitation with sodium carbonate. The brine is fed into the anode compartment of the cell, where chloride ions release the extra electron to the anode and are converted to chlorine gas. Anode and cathode compartment are separated by an asbestos diaphragm, which is formed directly on the wire screen cathode by a paper making technique (pulp of asbestos slurried in water and filtered on the cathode screen). It has the consistency of several layers of wet paper towels. By pumping brine into the anode compartment, the liquid level there is raised 10 to 30 cm above the level of the catholyte, causing a slow percolation of brine / anolyte through the diaphragm. Masstransport is both hydraulic and electric driven : Most important is that the hydraulic flow (percolation) should be enough to prevent the electricly driven transport of OH- ions from reaching the anode compartment, where they would cause side reactions (hypochlorite formation). Both driving forces for Na+ ions are in the same direction (toward the cathode); for Cl- ions it is in opposite directions (i.e. electric potential pulls Cl- toward the anode), but percolation is predominant, resulting in a catholyte containing 10 % NaOH plus 16 % unreacted NaCl. Cathode reaction is decomposition of water into hydrogen gas and OH- ions. The OH- ions together with Na+ ions coming through the diaphragm form NaOH.

  As the catholyte is evaporated, much of the NaCl contaminant precipitates and is recycled. The final product still contains about 1 % NaCl plus some hypochlorite and chlorate, limiting its usefulness.151.197.54.195 16:02, 24 February 2007 (UTC)

[edit] Modern use as a Chem. weapon?

Suggest somebody with more time and knowhow than I look into this. http://news.yahoo.com/s/ap/20070221/ap_on_re_mi_ea/iraq Appears to be the second or third such use of Chlorine gas as a chemical weapon by terrorists/insurgents. —The preceding unsigned comment was added by 71.194.57.200 (talk) 01:38, 22 February 2007 (UTC).

[edit] Downgraded article quality

Thoughg this article is good in all other ways I feel that the amount of references is insufficient for thje size of the article and the article should use the {{cite web}} citation template. see Argon for more details. 74.116.113.241 18:00, 14 March 2007 (UTC)

[edit] Chlorine as a chemical weapon

I've seen the use of chlorine as a chemical weapon has been mentioned in world war I but it needs to be mentioned as separated segment in this article mentioning also the recent use of chlorine during suicide attacks in Iraq (march 17).

thank you Minako-Chan* 20:55, 17 March 2007 (UTC)

[edit] B-Class

GA class is not part of project assessment scales, and GAs are not tracked by WP Bot 1.0. The assessment level has been set to B class. --Cryptic C62 · Talk 21:11, 28 March 2007 (UTC)

Then why do the templates still take a GA rank assessment? Homestarmy 21:12, 28 March 2007 (UTC)