## Acidic Water Molecules

Given the following article:

http://www.innovations-report.de/htm...cht-96564.html

What are "acidic water molecules"?
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 Quote by RJ Emery Given the following article: http://www.innovations-report.de/htm...cht-96564.html What are "acidic water molecules"?
Well, if the water is dissociated into H and OH, I guess a preponderance of H would make it acidic. But that H is not a molecule.

I just went looking in wiki for pH and they talk about H3O+ as a sort of substitute for H, so maybe that's what they're talking about.

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 Quote by DaveC426913 Well, if the water is dissociated into H and OH, I guess a preponderance of H would make it acidic. But that H is not a molecule. I just went looking in wiki for pH and they talk about H3O+ as a sort of substitute for H, so maybe that's what they're talking about.
That formula, $$$H_3 O^{ + 1}$$$, represents both an ion and a solvated proton; not a molecule

## Acidic Water Molecules

What makes things acidic is H+ ions, right?

That's only correct to a certain extent. When we refer to H+ ions, we refer to the hydronium ion, H3O+ as some have said. This is what makes acidity. You can't have acidity without water. So you can have the most intense acid in the world, with a pH of 1 or something, but if you remove the water content from it, it will not be acidic.
 Just what the authors of the innovations report mean by acidic water is not clear to me. To see one example of how the phrase "acidic water molecules" is actually used by chemists, go to http://www.rsc.org/ej/CC/2001/b103533a.pdf Toward the end of the article you read: "...When phenylboronic acid is then added to the methanol solution water molecules present in the methanol coordinate with the boron Lewis acid and become more acidic. These more acidic water molecules can now protonate compounds 1 and 3 as well as compound 2." So, acidic water molecules are simply molecules of water that can more easily give up a proton. Note that water is not necessary to have an acid. An acid is a substance that can take up an electron pair to form a covalent bond. For example, boron trichloride (BF3) is an acid and combines with such bases as ammonia or ethyl ether.

 Quote by Invictious So you can have the most intense acid in the world, with a pH of 1 or something,
I think you meant 7.

 Quote by symbolipoint That formula, $$$H_3 O^{ + 1}$$$, represents both an ion and a solvated proton; not a molecule
I know it's an ion but isn't a molecule any combination of 2 or more atoms? Or have things changed since I was in H.S.?
 Recognitions: Gold Member Homework Help Science Advisor By far the most abundant interstellar polyatomic molecule aside from H2 is H3+. Since the proton affinity of H2 is extremely low, this abundant molecular ion is a strong acid and will protonate anything it comes across, including water. This produces the ion H3O+ which has a characteristic far infrared spectrum that can be observed with the proper equipment. This is what is meant by interstellar acidic water. Here is a paper on the subject.

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