Talk:Calcium chloride
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things to discuss:
properties -- melt,boil,weight,etc
hydrides
uses -- de-ice (eutectic), food, phase change material, etc
Can somebody check the fix I did to the link to the Japanese wikipedia? I can't read the linked page, so I can't tell if this is a correct link. RickK 07:32, Nov 7, 2004 (UTC)
Who would have ever thought you could make calcium chloride with magnesium! Glad there's resources like wikipedia to set things straight!
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[edit] Colour
Anybody knows the colour of calcium chloride when damp?
- When totally pure it should be colourless, but the technical grade product (used as a drying agent) often has a yellowish or brownish tinge to it when it gets damp.
Walkerma 17:47, 12 Mar 2005 (UTC)
[edit] Use in concrete mixes
"It is used in concrete mixes to help speed up the initial setting and to strengthen the concrete.". Adding calcium chloride to the concrete mix will make (in about a 10-year timeframe) the rebar rust, and make way for "concreterot" (dutch: "nl:betonrot"). Rust has 6 times the volume of iron; this process will eventually crack the surface off the concrete, laying bare the rebar, further weakening the structure. Therefore, the use of calcium chloride in concrete mixes is banned in the Netherlands (at least, might be in all of Europe).
Might be worth a note. 83.160.162.119 01:20, 5 January 2006 (UTC)
- Yes, chloride ion does corrode steel so this makes sense. I don't know about a ban, but I have added a warning and an external link to a recent academic report on this. If you find out "concrete" information about a ban please post this. Thanks for pointing it out. Walkerma 03:55, 5 January 2006 (UTC)
The link to the article regarding chlorides and steel corrosion isn't working. I am looking for the conditions necessary for calcium chloride to corrode stainless steels and how this process maybe changed by partial vacuum? Any help or info is appreciated. --Alexlord8 16:57, 16 January 2007 (UTC)
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- OK, I added a link to this article which describes both the use as an accelerant and the corrosion problem, with citations. I hope this meets your needs. I also found a recent academic paper on effects of CaCl2 on Portland cement, but I only added that into the concrete article, it seemed to fit better there. Walkerma 18:38, 16 January 2007 (UTC)
[edit] Help!
I am writting a discussion for a science prac...and this article isn't helping me answer this question: Why marble chips (calcium carbonate) changed form to calcium chloride?
can you please help me?
from Hannah
It seems to me like the chemical reaction you were doing was this:
CaCO3 + 2HCl → CaCl2 + CO2 + H2O
--AndreRD 13:25, 10 May 2006 (UTC)
[edit] Hydroscopic?
It says that Calcium Chloride is hydroscopic. I don't know a lot about chemistry but wouldn't that mean that it remains dry when confronted with water? Why then is it labelled with a water crystal form afterwards? --AndreRD 13:18, 10 May 2006 (UTC)
- I think you're confusing hydroscopic (hygroscopic) with hydrophobic. Hydrophobic materials (for example, Teflon/Gore-Tex) remain dry when confronted with water.
- Atlant 13:36, 10 May 2006 (UTC)
[edit] HELP
What is ONE fact about calcium carbonate NOT in the article???!!! doing report and jotted down all notes i could but need 1 more!!!!!!!!!!
[edit] Is calcium chloride edible or not?
So I got a can of sliced carrots at Whole Foods, and the ingredients listed are carrots, water, salt, and calcium chloride. I was curious as to the calcium chloride and looked it up on wikipedia. It says calcium chloride is used as a salt substitute in some foods because while it tastes very salty, it does not up the sodium content of the food. It also says it helps to keep canned foods firm (because it's so good at absorbing water, I assume). It's also used in two other food products. But then it says: "Calcium chloride is an irritant; wear gloves and goggles to protect hands and eyes; avoid inhalation. Although calcium chloride is relatively safe to handle, care should be taken that it is not ingested. Calcium chloride reacts exothermically with water and can burn the mouth and esophagus." ?! Should I be alarmed that I just ate a can of sliced carrots that had calcium chloride as an ingredient? Should I be alarmed that Whole Foods is selling it? If it's as dangerous as the wiki page says, why is it being put into food? Just curious...
(sorry, my laptop doesn't have tildes) Sofia Soledad
- In small quantities, absolutely yes. Because it contains calcium rather than sodium, you can sometimes found it sold in supermarkets as a salt substitute and that's probably why it was in your carrots. In large quantities, of course, any salt is poisonous if only because it screws up your electrolyte balance.
- Atlant 14:00, 31 January 2007 (UTC)
The hygroscopic waterfree calcium chloride will react in your mouth with water and will heat up, this reaction will be irritant. The hexahydrated form easyly dissolves in water and is by far less harmfull.--Stone 15:33, 31 January 2007 (UTC)
[edit] Ionic?
Is calcium chloride ionic or covalent/molecular? —The preceding unsigned comment was added by Difficult (talk • contribs) 23:26, 10 February 2007 (UTC).
