Talk:Sodium chloride

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Sodium chloride is essential for life.

Rephrased this rather inaccurate poo formulation.

This saline solution can be prepared by dissolving 0.85 gram of sodium chloride in 100 ml of distilled water.

Removed this sentence because it is a tautology of the preceeding sentence (0.9% NaCl is physiological solution), but is numerically inconsistent (0.9% vs 0.85%).
—Herbee 12:55, 2004 Apr 6 (UTC)

This page needs more subheadings and quite a bit of reorganization. I'll put it on my list, but if someone else gets here first-- Elf | Talk 21:37, 16 Apr fgfgd ,fjkvifjgnv,kiofjg2004 (UTC)

I did a reorganization and a slight wikification on April 18. I read that 0.9% salt in normal saline is in fact an osmolality, does this refer to moles or grams? I was thinking that the osmosis info in here is incorrect, but I'll look into that before I edit. This is one of my first big edits, so please head over to my talk page and leave me your comments :) --MGM 13:53, Apr 18, 2004 (UTC)

If I remember corectly, when a statment reads "...contains 0.9% of X" it is assumed to be mass %. At least this is the convention in the enginering disipline.

Solde and soldier come from sal? Salary comes from sal, but I thought the other terms came from solidus, a "solid" Roman "shilling". Chameleon 13:58, 23 Oct 2004 (UTC)

The American Heritage Dictionary gives them separate Indo-European roots (sal- for salt, sol- for whole), so it looks like they don't even have a more distant relationship. I've removed the passage accordingly. Josh

Contents

[edit] Should this be merged with Edible salt

Should this be merged with Edible salt?

Certainly not! Sodium chloride is a major industrial chemical (edible salt is, in quantity terms, a rather minor use I believe). It's also the archetypal ionic compound. The only reason the article doesn't fully reflect that is simply that the chemists haven't really sunk their teeth into it yet - we only have a couple of people contributing on industrial chemistry. WP:Chem plans to upgrade this article, which will mean adding detailed sections on its chemical properties. By the time the project has raised it to A-class standard it will be twice as long, and the content will look much more like sodium sulfate. I suspect most chefs will not be interested to know about solvation with crown ethers, or production figures for NaCl products! Walkerma 14:25, 6 October 2005 (UTC)
I agree. ~K 20:53, 15 October 2005 (UTC)

[edit] Moving old chembox data here

Thermochemistry
ΔfH0gas -181.42 kJ/mol
ΔfH0liquid -385.92 kJ/mol
ΔfH0solid -411.12 kJ/mol
S'0gas, 100 kPa 229.79 J/(mol·K)
S0liquid, 1 bar 95.06 J/(mol·K)
S0solid 72.11 J/(mol·K)

This is the old chembox data that doesn't transfer to the new chembox. I'll be changing the old chembox to the new style now. ~K 20:53, 15 October 2005 (UTC)

These data have now been placed in their new "home" on the NaCl supplementary data page. Walkerma 02:26, 16 December 2005 (UTC)

[edit] Revert on food additive section

I reverted an addition to this section just now for three reasons:

  1. The new piece was written in very poor English, with many spelling mistakes
  2. It appears to promote a particular brand of low-Na salt
  3. It duplicates material covered here; the existing piece is written very clearly and succinctly. Walkerma 02:12, 16 December 2005 (UTC)

[edit] chemical formula of salt

[edit] Salt March of Gandhi

I may not have written it in there, but honestly, does that piece really need some online page for citing? I mean, perhaps at the very most, it could have a link to the wikipedia page about his salt march.

That sounds like a good idea, I've just added such a link. Also, since many references abound to this on the web, I'm going to add a citation, too. Rbulling 15:58, 12 May 2007 (UTC)

[edit] The pH of Salt

What's the pH of sodium chloride?

I'm pretty sure it's almost exactly 7, or neutral. That's because it's the salt of a strong acid and a strong base. Walkerma 01:46, 29 October 2006 (UTC)

== Crystal Structure ==

Hello everyone. Under the image of the crystal structure of NaCl, it says "Each atom has four nearest neighbors, with octahedral geometry.". I think this is incorrect. Each atom has 6 1st neighbors of the other species and 12 2nd neighbors of the same species. I'm not 100% confident so I wont edit but if someone more competent can check it out it would be great. Thx. Patrick's Hubris 20:18, 4 February 2007 (UTC)

(edit concerning Octahedral geometry) I can absolutely see the six neighboring atoms forming the vertices of an Octahedron. Jlindbergh 12:37, 4 May 2007 (UTC)

[edit] Addition of 3d model

I rather hastily added an external link showing a 3d model of the crystal structure quite like the Image already existing. I would like to apologize for adding the link without consulting the talk page. I cannot deny there's some site promotion involved, but I honestly thought it would be helpful and interesting to have it as a link on the page. The page in question is the 3d model of a Sodium Chloride lattice. If someone finds it helpful or interesting in some way, we can perhaps consider adding it again. Regards, Jlindbergh 12:47, 3 May 2007 (UTC)

[edit] History of sodium chloride

The history section was removed with the argument that the salt article is broader in scope, so the history fits better there. I agree, considering that the history section was about salt in society, salt in the ancient world, etc. However, I still think this article needs a section on "history of sodium chloride" from the point of view of chemistry. Some questions it should address are:

  • What was the role of salt as one of the alchemical principles, together with sulphur and mercury?
  • When was it discovered that salt is a compound, and that it can be made from neutralization?
  • When was salt first used for chemical processes such as making hydrochloric acid and sodium hydroxide?
  • When was its composition discovered?
  • When was the modern name adopted?
  • When was its crystal structure determined?
  • What was the role of sodium chloride in the development of theories of chemical bonding?

I'll see if I can create such a section one of these days, but it needs quite a bit of research. If anyone else is interested, please don't hesitate to do it first! I won't be offended! ;-) --Itub 07:53, 24 May 2007 (UTC)

[edit] lethal dose

anyone know the ld50 for salt in people? animals will suffice if there isn't information available.Bluebonics 17:48, 10 September 2007 (UTC)

[edit] Possible Uses

I'm not exactly sure what should be in the Possible Uses section, but I'm quite certain that it shouldn't have as many exclamation points as it has... or ellipses. Maybe someone who knows more about the subject could clean that up, because it seems like they may be saying something interesting... TylerNi7 00:14, 11 September 2007 (UTC)

[edit] Unclear phrase

Salt is also known in the chemical world as a nuclear additive. I work in the chemical world and I've never heard this. What does it mean, and why is it in the section on the crystal structure? Walkerma 05:40, 23 September 2007 (UTC)

[edit] Picture gallery

That gallery seems to be covering part of the article.. Shouldn't it be moved lower in the page? Drakonis 17:19, 4 October 2007 (UTC)

[edit] Misconception of De-icing

The common misconception that salt actually melts ice should not be propogated here. The following sentence was found:

"In practice, however, sodium chloride can melt ice only down to about -9 °C (15 °F)."

Not only does this not make sense even if salt could melt ice, it is factually inaccurate. NaCl does not melt ice and is useless for de-icing roads that have already been covered with ice. It does however lower the freezing point of water which in turns makes the formation of ice occur at a lower temperature.

I will remove this sentence, and have no plans to replace it, becasue I do not know the intentions of the original poster. —Preceding unsigned comment added by 152.3.245.29 (talk) 04:21, 6 December 2007 (UTC)

In addition I've heard, that Calcium Chloride is used to de-ice roads and not Sodium Chloride, which would mean that this information is misplaced anyway. —Preceding unsigned comment added by 70.238.83.178 (talk) 19:28, 11 March 2008 (UTC)

[edit] salty question for you salty bastards

i heard that yearly, approx. 25% of the world's salt is used on american roads. confirm.. —Preceding unsigned comment added by 66.102.204.88 (talk) 14:27, 11 December 2007 (UTC)

[edit] Missing data

Something missing on several chemical compound pages is what temperature is necessary to dehydrate hydated salt. Unfortunately I don't know the answer. Tabby (talk) 01:34, 16 March 2008 (UTC)