-OH vs OH-

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Anya Holbrook 1E
Posts: 91
Joined: Wed Sep 30, 2020 9:38 pm

-OH vs OH-

Postby Anya Holbrook 1E » Mon Dec 07, 2020 5:50 pm

This doesn't really have anything to do with calculating pH, but why is it that sometimes in Dr. Lavelle's notes he put -OH instead of OH-? Don't charges on a molecule or ion go after the naming?

Evie Li_1H
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Re: -OH vs OH-

Postby Evie Li_1H » Mon Dec 07, 2020 5:52 pm

I don't think it's that big of a deal whichever side you decide to put the charge on but, traditionally, the charge will come after the ion.

IshanModiDis2L
Posts: 84
Joined: Wed Sep 30, 2020 9:49 pm

Re: -OH vs OH-

Postby IshanModiDis2L » Mon Dec 07, 2020 6:09 pm

I believe the charge usually will come after the ion but I do not think it rly does matter too much. Only time I would really consider it is when drawing a structure.

JaylinWangDis1L
Posts: 91
Joined: Wed Sep 30, 2020 10:09 pm

Re: -OH vs OH-

Postby JaylinWangDis1L » Mon Dec 07, 2020 8:31 pm

I was also a little confused on this at first but I think the placement of the negative sign doesn't really matter. It's usually written after the ion.

Cooper_Geralds_3B
Posts: 97
Joined: Wed Sep 30, 2020 10:07 pm

Re: -OH vs OH-

Postby Cooper_Geralds_3B » Mon Dec 07, 2020 8:47 pm

Hi, I noticed the -OH in today's lecture as well and am used to seeing OH- in both his lectures and the homework, but I am pretty certain that they are the same!

Ryan_Page_1J
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Re: -OH vs OH-

Postby Ryan_Page_1J » Mon Dec 07, 2020 10:26 pm

I have noticed that he uses them interchangeably as well.

505352202
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Re: -OH vs OH-

Postby 505352202 » Mon Dec 07, 2020 10:45 pm

It does not really matter. When he puts the - before like -OH, he is trying to emphasize that the oxygen is the atom with the negative charge and not the hydrogen.

I hope this helps!

apurva-3E
Posts: 135
Joined: Wed Sep 30, 2020 9:59 pm

Re: -OH vs OH-

Postby apurva-3E » Tue Dec 08, 2020 2:16 pm

I don't think it matters.

Brian Bui 3H
Posts: 91
Joined: Wed Sep 30, 2020 9:42 pm

Re: -OH vs OH-

Postby Brian Bui 3H » Tue Dec 08, 2020 2:21 pm

Does not matter, but I think that he puts the negative charge on the O because that O has a formal charge of -1, which is typically indicated with just a negative sign.

SamayaJoshi1A
Posts: 93
Joined: Wed Sep 30, 2020 9:37 pm

Re: -OH vs OH-

Postby SamayaJoshi1A » Tue Dec 08, 2020 3:01 pm

-OH and OH- are the same thing!

Isabel_Eslabon_2G
Posts: 89
Joined: Wed Sep 30, 2020 9:50 pm

Re: -OH vs OH-

Postby Isabel_Eslabon_2G » Tue Dec 08, 2020 3:49 pm

It's the same thing. In general, is how you'd normally write it when writing a chemical equation. is used more when writing diagrams or mechanisms to emphasize that the negative charge is from the oxygen, not the hydrogen.

DPatel_2L
Posts: 70
Joined: Wed Sep 30, 2020 9:41 pm

Re: -OH vs OH-

Postby DPatel_2L » Fri Dec 11, 2020 8:01 pm

They are the same thing!

Linette Choi 3L
Posts: 88
Joined: Wed Sep 30, 2020 9:51 pm

Re: -OH vs OH-

Postby Linette Choi 3L » Sun Jan 17, 2021 10:37 pm

I believe (OH-) is used more often but I think they mean the same thing.

Katelynn Shaheen 2C
Posts: 41
Joined: Tue Nov 05, 2019 12:18 am

Re: -OH vs OH-

Postby Katelynn Shaheen 2C » Thu Feb 18, 2021 8:42 pm

It doesn't matter, -OH and OH- are the same thing in his lectures.


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