Talk:Hydrogen chloride

occurrence in food

This stuff shows up quite a bit in foods because it is a product of water (which is of course in most foods) and common preservatives such as as calcium chloride. I'm planning to put some more stuff in here regarding this, because very often you chemists go bananas over industrial applications of compounds like these, and include occassionally some info on occupational levels of inhalant and dermal exposure, but rarely address nonacute symptoms or oral toxicity/bioactivity.Koyae (talk) 11:55, 11 October 2009 (UTC)

Density

According to the value in the chembox, density of HCl is 1.2 g cm^-3. This is larger than that of water, though HCl is gas at STP. Is there anybody who knows information about the temperature? --Nao1958 (talk) 14:18, 11 May 2011 (UTC)

According to the CRC Handbook (91st edition), the density of hydrogen chloride is 1.490 g/L. This seems much more appropriate for a gas. It might be worth discussing the density of liquid HCl in the main article text. According to the HCl entry in Air Liquide's online Gas Encyclopedia, liquid HCl has a density of 1.191 g cm⁻³ at its boiling point of −85 °C. --Ben (talk) 15:06, 11 May 2011 (UTC)

MSDS

The MSDS link is not accurate as it refer to a hydrochloric acid MSDS need to link to an hydrogen chloride MSDS — Preceding unsigned comment added by 67.224.83.50 (talk) 16:11, 5 November 2012 (UTC)

Calculation of the Ka value

For example:

Ka(HCl) = [Cl−
]×[H+
]÷[HCl]
        = (Density(Cl−
)÷Molar mass(Cl−
))×(Density(H+
)÷Molar mass(H+
))÷(Density(HCl)÷Molar mass(HCl))
        ≈ (?g/L÷35.45g/mol)×(?g/L÷1.01g/mol)÷(1.49g/L÷36.46g/mol)
        ≈ ?mol/L×?mol/L÷0.04mol/L

But how to get the Density(Cl⁻
) and Density(H⁺
)? Or is it possible to get the [Cl⁻
] and [H⁺
] directly?

Thanks. 123.119.16.126 (talk) 13:07, 27 May 2014 (UTC)

User:Dirac66 answered similar question at Talk:Acid dissociation constant. DMacks (talk) 18:52, 28 May 2014 (UTC)

Spelling the formula of hydrogen halides as XH instead of HX in this and other related articles

I came upon the weird spelling of this compound in the "summary sheet" to the right, spelling the chemical formula of HCl as ClH. Then I checked other hydrogen halides and indeed noticed that all of them except HI were spelled as XH (i.e BrH). Unless IUPAC recently changed their guidelines for naming binar compounds, I think there may be a mistake there, although reviewing the code used to display the name I noticed the reason they were different:

All of the misspelled hydrogen halides, called XH, were coded as, for example,

|Section2={{Chembox Properties | H=1 | Cl=1

Whereas the correctly spelled HI was coded as

|Section2={{Chembox Properties | Formula = HI

Further analysis after editing the HI page to conform to the same coding structure as other pages resulted in a correct spelling of the molecule (as HI!). This led me to the idea that maybe there is an error in the code for the chemical formula as they are depicted in the majority case here: all of the first "X" letters are alphabetically before "H" (i.e B, C, F), whereas "I" is just after "H", which would explain why the former would be placed before "H" in the chemical formula of that compound, and the latter, after.

O pc (talk) 09:59, 7 May 2017 (UTC)

There are two ways that the Chembox can handle molecular formulas. If it is inputed as "| H=1 | Cl=1" then the default ordering is Hill notation which displays as "ClH". Hill notation is appropriate for organic compounds, but not necessarily so for other chemical compounds such as the hydrogen halides. Inputing "| Formula = HCl" will display the more standard "HCl". I'll go through the hydrogen halides and fix them. -- Ed (Edgar181) 10:52, 7 May 2017 (UTC)

Wrong unit for density

It should be g/ml not g/L — Preceding unsigned comment added by 141.52.248.1 (talk) 20:00, 13 February 2022 (UTC)