Is pH normally taken at equilibrium concentrations?

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Hannah Lee 2F
Posts: 117
Joined: Thu Jul 11, 2019 12:15 am

Is pH normally taken at equilibrium concentrations?

Postby Hannah Lee 2F » Sat Mar 14, 2020 7:26 pm

If the question gives you a pH of a solution with a certain initial molarity, could you imply that the [H+] you calculate from it is its equilibrium [H+] concentration?

Ami_Pant_4G
Posts: 106
Joined: Sat Aug 24, 2019 12:17 am

Re: Is pH normally taken at equilibrium concentrations?

Postby Ami_Pant_4G » Sat Mar 14, 2020 7:29 pm

I think yes, if it doesn't say anything like "the starting or initial pH was...", you can assume it is at equilibrium.

dtolentino1E
Posts: 101
Joined: Thu Jul 11, 2019 12:17 am

Re: Is pH normally taken at equilibrium concentrations?

Postby dtolentino1E » Sat Mar 14, 2020 7:30 pm

i think the problem will specify if the pH is at the initial or equilibrium state of the solution, because you could put that H+ concentration at either point when making your ICE table

Indy Bui 1l
Posts: 99
Joined: Sat Sep 07, 2019 12:19 am

Re: Is pH normally taken at equilibrium concentrations?

Postby Indy Bui 1l » Sat Mar 14, 2020 7:31 pm

Usually it should tell you if it isn't taken at equilibrium. This really isn't a big problem, just make sure you put the H+ concentration in the correct place in the ice tables.

Queena Chu 1I
Posts: 40
Joined: Wed Sep 30, 2020 10:09 pm

Re: Is pH normally taken at equilibrium concentrations?

Postby Queena Chu 1I » Sun Nov 08, 2020 11:58 pm

If not given specifics, then it's safe to assume that it's at equilibrium.

Katie Le 2K
Posts: 50
Joined: Wed Sep 30, 2020 9:35 pm

Re: Is pH normally taken at equilibrium concentrations?

Postby Katie Le 2K » Mon Nov 09, 2020 12:10 am

I think if not asked for it directly in the question, it's safe to assume its at equilibrium.

Katie Phan 2H
Posts: 40
Joined: Wed Sep 30, 2020 9:55 pm

Re: Is pH normally taken at equilibrium concentrations?

Postby Katie Phan 2H » Mon Nov 16, 2020 12:16 am

It usually is implied that it's at equilibrium.

IshanModiDis2L
Posts: 42
Joined: Wed Sep 30, 2020 9:49 pm

Re: Is pH normally taken at equilibrium concentrations?

Postby IshanModiDis2L » Mon Nov 16, 2020 12:37 am

If you do not see anything stating otherwise, it is safe to assume the system is at equilibrium.


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