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Topic: Is HCl synthesized in the body and released to the stomach?  (Read 237 times)

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Offline Jfalken

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Is HCl synthesized in the body and released to the stomach?
« on: March 30, 2021, 05:32:03 AM »
So we have all been told that the parietal cells secrete HCl to the stomach yet I have yet to see a reaction formula that shows that H+ + Cl- --> HCl in the body.
All I ever see is protons being excreted into the lumen and that Cl- is there too.
But nowhere have I seen that HCl is actually formed.
To have solvatized ions in the lumen does not count as HCl as they are, as stated, solvatized.

Have I missed something here?
A rxn or similar?

Offline Babcock_Hall

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Re: Is HCl synthesized in the body and released to the stomach?
« Reply #1 on: March 30, 2021, 09:40:22 AM »
I think that the problem lies the interpretation of what it means to make HCl.  IMO, the presence of hydrogen ions and chloride ions counts as HCl, but YMMV.

Offline Borek

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Re: Is HCl synthesized in the body and released to the stomach?
« Reply #2 on: March 30, 2021, 10:09:06 AM »
Generally speaking there is no such thing as "HCl in water". It immediately dissociates into H+ and Cl-, so any solution containing these two (from whatever source) is identical to the solution prepared by dissolving HCl in water.

This is not much different from other solutions. Imagine a solution that is 0.1 M in Na+, 0.1 M in K+, 0.1 M in Cl- and 0.1 M in Br-. Is it a solution of 0.1 M NaCl and 0.1 M KBr, or 0.1 M NaBr and 0.1 M KCl? Or perhaps neither and the question about which salts are dissolved doesn't make much sense, as it is ions present that matter, not the way the solution was made?
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Offline Jfalken

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Re: Is HCl synthesized in the body and released to the stomach?
« Reply #3 on: March 31, 2021, 09:51:33 AM »
If I take water, and I put NaCl into it so I get the chloride ions in the water and then I add protons (from any random source), then according to your definition I should have HCl containing solution because there are Cl ions and an excess of protons..
I do not really agree with you here.
If textbooks wants to say that we PRODUCE HCl acid then I want to see a reaction mechanism showing that HCl is formed.
If the protons originates from a different source, and the chloride ions originate from a source of its own, then one can not simply say that it is HCl acid..

Offline Borek

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Re: Is HCl synthesized in the body and released to the stomach?
« Reply #4 on: March 31, 2021, 01:35:38 PM »
I do not really agree with you here.

Two people pointed you to a flaw in your line of thinking, if you don't accept it - your choice.

But you won't get better answer.
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Offline Corribus

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Re: Is HCl synthesized in the body and released to the stomach?
« Reply #5 on: March 31, 2021, 02:58:52 PM »
Generally speaking there is no such thing as "HCl in water".
Right. This was a great articulation of where the problem lies, Borek.
What men are poets who can speak of Jupiter if he were like a man, but if he is an immense spinning sphere of methane and ammonia must be silent?  - Richard P. Feynman

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