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Author: Subject: HOCl → HCl
Romix
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[*] posted on 17-9-2024 at 21:02


What you guys think, could this reaction be fake?
Not seen it anywhere else other than this video, although seen it's formula on other chemical forums.
You can hear guys in the video choking on Ammonia!!!
If it's fake might save me going through all the hustle on page 1, hahaha!!!
https://www.youtube.com/watch?v=CVzoQhhqfPI


[Edited on 18-9-2024 by Romix]
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clearly_not_atara
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[*] posted on 17-9-2024 at 21:43


What on Earth does that video have to do with making HCl?

You seem to be under the impression that a solution of chlorine in water is the same as the pure compound HOCl. This is not the case. An equilibrium exists, similar to the situation with carbon dioxide.

Cl2 + H2O << >> HCl + HOCl

CO2 + H2O << >> H2CO3

Only a small percentage of the chlorine exists as HOCl. Preparing pure HOCl or even an aqueous solution is very difficult.

EDIT: You may be able to make HCl from Cl2 by membrane electrolysis. PbO2 anode, chlorine in the cathode chamber, probably Ti cathode. Not sure what membrane would handle this.

It also appears that hydrogen peroxide might reduce aqueous chlorine. But IIRC it also oxidizes HCl to some extent. The resulting acid will not be free of chlorine without further work.

[Edited on 18-9-2024 by clearly_not_atara]




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Romix
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[*] posted on 17-9-2024 at 21:52


Quote: Originally posted by clearly_not_atara  
What on Earth does that video have to do with making HCl?

You seem to be under the impression that a solution of chlorine in water is the same as the pure compound HOCl. This is not the case. An equilibrium exists, similar to the situation with carbon dioxide.

Cl2 + H2O << >> HCl + HOCl

CO2 + H2O << >> H2CO3

Only a small percentage of the chlorine exists as HOCl. Preparing pure HOCl or even an aqueous solution is very difficult.

Not believing it, why there is no equilibrium with HCl alone, but would be here.
Ok maybe there is with HOCl, I did notice release of Cl2 after reacting it deep in water, could just be escaping from blowing big current of Cl2 into it and not having enough time to react with H2O or could be equilibrium, don't have enough experience with HOCl to tell!
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Romix
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[*] posted on 17-9-2024 at 23:15


Quote: Originally posted by Romix  
Quote: Originally posted by clearly_not_atara  
What on Earth does that video have to do with making HCl?

You seem to be under the impression that a solution of chlorine in water is the same as the pure compound HOCl. This is not the case. An equilibrium exists, similar to the situation with carbon dioxide.

Cl2 + H2O << >> HCl + HOCl

CO2 + H2O << >> H2CO3

Only a small percentage of the chlorine exists as HOCl. Preparing pure HOCl or even an aqueous solution is very difficult.

Not believing it, why there is no equilibrium with HCl alone, but would be here.
Ok maybe there is with HOCl, I did notice release of Cl2 after reacting it deep in water, could just be escaping from blowing big current of Cl2 into it and not having enough time to react with H2O or could be equilibrium, don't have enough experience with HOCl to tell!

There is equilibrium in close to concentrated HCl, even so HCl fumes, fumes are white, not yellow, like Cl2 should be!!!
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RU_KLO
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[*] posted on 18-9-2024 at 04:49


Early in the study of elementary chemistry one learns that chlorine reacts with water in the sense of the expression

Cl2 + H2O <<>> HCl + HOCl

and that the hypochlorous acid decomposes thus,

HClO -> HCl + O

Owing to the instability of hypochlorous acid in the presence of hydrochloric acid, the first reaction progresses to a very limited extent and the production of the end-products, oxygen and hydrochloric acid, is greatly accelerated by light. This accounts for the fact that aqueous solutions of chlorine eventually become aqueous solutions of hydrochloric acid upon standing in the laboratory, and should thecefore be protected from the light.

THE PRODUCTION OF HYDROCHLORIC ACID FROM CHLORINE AND WATER
By H. D. Gibbs

(paper on this post:
https://www.sciencemadness.org/whisper/viewthread.php?tid=16...)

The reaction between HCl and HOCl, which is the reversal of Cl2 hydrolysis,
is a textbook reaction that has long been used for water disinfection and waste-water treatment.

"Catalysis of the reaction HCl+HOCl -> H2O+Cl2 on an ice surface"
https://doi.org/10.1016/S0009-2614(99)00683-1

So from this I understand that: or the HOCl is decomposed or transformed to Chlorine.
So no HOCl & HCl living together in peace.






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Romix
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[*] posted on 18-9-2024 at 05:17


Quote: Originally posted by RU_KLO  
Early in the study of elementary chemistry one learns that chlorine reacts with water in the sense of the expression

Cl2 + H2O <<>> HCl + HOCl

and that the hypochlorous acid decomposes thus,

HClO -> HCl + O

Owing to the instability of hypochlorous acid in the presence of hydrochloric acid, the first reaction progresses to a very limited extent and the production of the end-products, oxygen and hydrochloric acid, is greatly accelerated by light. This accounts for the fact that aqueous solutions of chlorine eventually become aqueous solutions of hydrochloric acid upon standing in the laboratory, and should thecefore be protected from the light.

THE PRODUCTION OF HYDROCHLORIC ACID FROM CHLORINE AND WATER
By H. D. Gibbs

(paper on this post:
https://www.sciencemadness.org/whisper/viewthread.php?tid=16...)

The reaction between HCl and HOCl, which is the reversal of Cl2 hydrolysis,
is a textbook reaction that has long been used for water disinfection and waste-water treatment.

"Catalysis of the reaction HCl+HOCl -> H2O+Cl2 on an ice surface"
https://doi.org/10.1016/S0009-2614(99)00683-1

So from this I understand that: or the HOCl is decomposed or transformed to Chlorine.
So no HOCl & HCl living together in peace.



Thanks!
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HoxonLabs
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[*] posted on 21-9-2024 at 07:24


You could heat the solution, expose it to UV light, or reduce it with sodium thiosulphate, for example.
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