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

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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)

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Who would have ever thought you could make calcium chloride with magnesium! Glad there's resources like wikipedia to set things straight!

Contents 1 Colour 2 Use in concrete mixes 3 Help! 4 Hydroscopic? 5 HELP

[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)

[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!!!!!!!!!!

This is calcium chloride, not calcium carbonate. Argyriou (talk) 03:13, 6 November 2006 (UTC)