Hello,

I would like to ask you a question about Nernst equation. So this is the correct notation of Nernst's equation if I want to calculate the pH measured with a pH meter?:

\( E= E0 + (2,3RT)/(nF) * pH \)

So does a pH meter use this equation to calculate pH?

Thank you in advance!

## Nernst equation

**Moderators:** expert, ChenBeier, Xen

- ChenBeier
- Distinguished Member
**Posts:**1005**Joined:**Wed Sep 27, 2017 7:25 am**Location:**Berlin, Germany

### Re: Nernst equation

Yes it does. The measurment is a difference between a known calibrated solution inside the probe and the unknown value of the sample.