Finding concentration of H30+

Acidity
Basicity
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Jessica Esparza 2H
Posts: 130
Joined: Wed Sep 18, 2019 12:15 am

Finding concentration of H30+

Postby Jessica Esparza 2H » Mon Dec 02, 2019 8:52 pm

On homework question 6A.23, it says to calculate the initial molarity of Ba(OH)2 and the molarities of Ba2+, OH-, and H3O+. You can find the first two, which I got 0.05M for OH-. However I don't understand how'd you find the H3O+ concentration. Is there a certain formula you always use? The solutions used something that was Kw/[OH-]. Also is Kw always a constant?

Ada Chung 1C
Posts: 55
Joined: Sat Aug 17, 2019 12:15 am

Re: Finding concentration of H30+

Postby Ada Chung 1C » Mon Dec 02, 2019 8:59 pm

In order to find the concentration of H3O+ or H+ you can use the concentration formula: [H+][OH-]=10^-14. If you are given OH- concentration then you can find the H+ concentration.


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