Nernst Equation to find pH


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Miranda 1J
Posts: 51
Joined: Fri Sep 29, 2017 7:06 am

Nernst Equation to find pH

Postby Miranda 1J » Thu Feb 22, 2018 7:28 pm

I read through the book but I still don't understand how we use the Nernst Equation to find pH. Can someone please explain?

Cooper1C
Posts: 50
Joined: Fri Sep 29, 2017 7:07 am

Re: Nernst Equation to find pH

Postby Cooper1C » Thu Feb 22, 2018 7:45 pm

At standard conditions, you can use the formula to find the pH. The formula for ph is pH = -log[H+}, so you can find the concentration of hydrogen ions by the Nearst equation.The formula above is already converted from ln to log.

Phillip Winters 2F
Posts: 50
Joined: Fri Sep 29, 2017 7:05 am

Re: Nernst Equation to find pH

Postby Phillip Winters 2F » Thu Feb 22, 2018 11:47 pm

Yeah, if you solve for the concentration of H+ ions, you can then calculate the pH using the equation pH=log[H+]

Mitch Walters
Posts: 45
Joined: Fri Sep 29, 2017 7:07 am

Re: Nernst Equation to find pH

Postby Mitch Walters » Fri Feb 23, 2018 1:07 am

Find the concentration of H+ ions, and then take the negative log of that concentration.

Max Mazo 2C
Posts: 30
Joined: Fri Sep 29, 2017 7:06 am

Re: Nernst Equation to find pH

Postby Max Mazo 2C » Sun Feb 25, 2018 9:54 pm

Using the Nernst equation you can find the concentration of H+ ions which you can use to find pH. There was a homework problem that gave you pH and asked to find E, try looking at the solution for that if you're still confused.

Shreya Ramineni 2L
Posts: 50
Joined: Fri Sep 29, 2017 7:07 am

Re: Nernst Equation to find pH

Postby Shreya Ramineni 2L » Mon Feb 26, 2018 1:35 pm

you change the lnQ to 2.303logQ, as they are equivalent, and plug that into the equation. The -log[H+] will be the pH.

diangelosoriano
Posts: 49
Joined: Fri Sep 29, 2017 7:07 am

Re: Nernst Equation to find pH

Postby diangelosoriano » Tue Mar 06, 2018 5:35 pm

Since the pH is just a measure of the concentration of H ion concentration, we can use the Nernst equation to find it.


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