[Rainbow]

Hi everyone,

I'm looking for some good guides or tutorial on internet on how to set up mainly the Proton Condition (proton balance equation) and also related things like Charge and Mass Conditions/Balance Equations etc.

One can easily find good help on many topics, but these topics seem very hard to come by.

Can someone kindly point me to some good source(s) that cover how to set up Proton Conditions. I need it for my equilibrium studies, and I don't have any other sources than internet as of now. I've googles alot but haven't been able to find anything useful... which is something I find a bit surprising.

Thanks
Ulf

[Borek]

If you just want to calculate equilibrium, you don't need proton condition. Mathematically proton condition is just a combination of charge balance and mass balances of all substances present - and these are much easier to write and understand. Once you have them all, you are ready for calculations.

General approach to pH calculation (without proton condition):

http://www.chembuddy.com/?left=pH-calculation&right=general-pH-calculation

A little bit about proton condition can be found here:

http://www.ce.udel.edu/~dentel/233/AcidBase.html

Note how on that page once the proton condition is explained last mass balance equation is added and is told to be the combination of other balances and proton condition - that's IMHO putting things on head. You have to write charge balance and you have to write mass balances of at least some substances - why not just write mass balances of all substances and ignore proton condition?