Helping people learn and correct errors is wonderful and bonding. I think your heart is trying to get to you to bond with Moreless by putting your brain to work and showing that Moreless could be a little more precise.
HCl is Hydrogen Cloride, true, but HCl in water is Hydrochloric Acid, which, when I read Moreless's statement:
"HCL is Hydrochloric Acid , which in the Acid form, is a liquid "
I understand what he is saying. He is saying HCl in water is hydrocloric acid and it is liquid. This is true. You point out that a more grammatically and technically correct way of saying this is: "HCl is hydrogen cloride gas, which in acid form is a liquid." Basically you are tidying up the statement, which is a kind thing to do.
I think the terms Moreless could be using are "ion" and "ionized". Chloride is ionized Chlorine, meaning the presence of an extra electron.
So when Moreless is saying: "...when the symbol HCL is used identifying Hydrochloric Acid, which is a Liquid, in this case the CL represents the Isotope of Chloride !"
He is paraphrasing what Wikipedia says:
"In aqueous hydrochloric acid, the H+ joins a water molecule to form a hydronium ion, H3O+:
HCl + H2O ⇌ H3O+ + Cl−
The other ion formed is Cl−, the chloride ion. Hydrochloric acid can therefore be used to prepare salts called chlorides, such as sodium chloride."
So, it seems to me that the "gist" of what Moreless is saying is right on "layman's" level. I, at least understand the point. Chorinthian is offering what could/would/should be a friendly critique of the language which, if Moreless accepted it, would lend even more credibility to his assertions.