Problem 6.63

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Matt Sanruk 2H
Posts: 131
Joined: Wed Sep 18, 2019 12:21 am

Problem 6.63

Postby Matt Sanruk 2H » Wed Mar 04, 2020 8:30 pm

How did you guys approach this problem and how can you get the pH from voltage and vice versa?

Sebastian Lee 1L
Posts: 157
Joined: Fri Aug 09, 2019 12:15 am
Been upvoted: 1 time

Re: Problem 6.63

Postby Sebastian Lee 1L » Thu Mar 05, 2020 12:02 pm

When working with a pH electrode meter you have the following equation: .
This is derived from the Nernst equation where in this case, Q is just the concentration of H+ because in buffers, [HA] and [A-] are the same.

From here, you know that you are given the cell potential (E cell) at a certain pH. We can turn pH into [H+] and then solve for of the reaction because we know what the E cell for that H+ concentration is. From here, you can use that same equation to solve for the unknown [H+] because you are given E cell and you've just found E naught. Then you would find pH from the [H+].

Matt Sanruk 2H
Posts: 131
Joined: Wed Sep 18, 2019 12:21 am

Re: Problem 6.63

Postby Matt Sanruk 2H » Mon Mar 09, 2020 12:03 am

Oh I see this equation would make this a lot easier to solve. Thanks!


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