OH calculation

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Monica Soliman 3F
Posts: 97
Joined: Wed Sep 30, 2020 9:57 pm

OH calculation

Postby Monica Soliman 3F » Thu Dec 03, 2020 7:31 pm

How is OH- calculation different from H calculation? or are they calculated the same way using this setup pH=-log(H+)?

Stuti Pradhan 2J
Posts: 159
Joined: Wed Sep 30, 2020 9:32 pm
Been upvoted: 5 times

Re: OH calculation

Postby Stuti Pradhan 2J » Thu Dec 03, 2020 7:40 pm

Using the same set up as the H+ will give you the pOH. The equation is pOH=-log[OH]. To find pH from this, you can use pH+pOH=14. Otherwise, you can use the equation [H+]=1.0 x 10^-14/[OH-] to find the H+ concentration, and then find the pH from there.

This diagram is helpful to see how to convert between all the different values.
pH.gif (8.5 KiB) Viewed 30 times

Hope this helps!

Lakshmi Davuluri 1E
Posts: 90
Joined: Wed Sep 30, 2020 9:50 pm

Re: OH calculation

Postby Lakshmi Davuluri 1E » Thu Dec 03, 2020 9:37 pm

Yeah, it's basically calculated the same way. Like it was stated above, if you have the pH, then you can just subtract the pH from 14 to get the pOH.

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