is GWB software available with anyone.

Have a look:

http://www.eawag.ch/research_e/surf/Researchgroups/sensors_and_analytic/chemeql.html

http://www.kth.se/che/medusa/

http://www.phreeplot.org

Can I ask how to download Phreeplot software as it does not downloaded?

Please try the software of "HSC Chemistry", and load the Eh-pH module

We have same problem Dear Dhuha Albusalih.

Can anyone help us?

How can activate phreeplot software after download??

@Bahram Behnajady  You can try this following http address.   I think it is OK.

http://www.phreeplot.org/

use medusa. its simple and easy, but not precise

hi

if you are a student you can apply for free version of GWB. you can get a limited version of this software. 

http://www.crct.polymtl.ca/ephweb.php

Medusa is the easiest free software to use as it has a GUI. PhreePlot is more versatile but is a steeper learning curve and requires lines of code.