pH of a buffer water solution

[ValeryOchkov]

A very important property of natural water - is its buffering.
We reset the natural body of water (river, lake, sea, ocean) acidic waste water, and the pH of the water is almost unchanged.
See below for a simple example of the calculation pH of a buffer water solution.

See the video too http://communities.ptc.com/videos/2185#comment-3604

[ValeryOchkov]

The first question - what is the best origin for K1 and K2

(for Kw it is IAPWS)

[ValeryOchkov]

The Given-Find solution is not stabile. More correct - using programming:

[ValeryOchkov]

The problem is now on the Mathcad Server too!

Try please http://twt.mpei.ac.ru/MCS/Worksheets/Chem/pH-CO2-water.mcd

And see the picture

[HarveyHensley]

Valery,

This is a nice example. I wish you would post it as a Document in the ChE space. The Discussion area is so huge that it is almost of no use for browsing, only searching. Also, the Document area is a better place for finished examples than the works in progress usually found in the Discussion area.

Thanks for your contribution.

Harvey

[ValeryOchkov]

Harvey Hensley wrote:

Valery,

This is a nice example. I wish you would post it as a Document in the ChE space. The Discussion area is so huge that it is almost of no use for browsing, only searching. Also, the Document area is a better place for finished examples than the works in progress usually found in the Discussion area.

Thanks for your contribution.

Harvey

Thanks Harvey!

I have done it - see http://communities.ptc.com/docs/DOC-3333