veerenyadav - 28-9-2016 at 19:27
How to find out the correct pH from Eh-pH diagram to precipitate a metal compound from solution ? Does the Eh impact it by any means?
j_sum1 - 29-9-2016 at 04:49
I had to look up what Eh means. I know these as Pourbaix diagrams.
Now I don't know what your question means.
There are two axes which together describe the system you are looking at. The two parameters - Ph and oxidation potential uniquely define a point on
the diagram. The diagram then tells you what species are thermodynamically stable under those conditions. (Of course a system may take time to reach
equilibrium: the diagram is not about kinetics.)
I did not think they were difficult diagrams to read.
edit: punctuation.
[Edited on 29-9-2016 by j_sum1]
veerenyadav - 29-9-2016 at 18:45
Do not try too hard, This question is for experts
Dwarvensilver - 9-10-2016 at 13:25
Hi Veerenyadav,
look at the chart linked below and pH is read along the bottom X axis and solubility on the vertical Y axis.
for example Copper is least soluble at just over a pH of 9.0 and will precipitate copper hydroxide the best at that pH. Hope this clarifies a bit.
http://www.porexfiltration.com/files/theroetical-solubility-...
[Edited on 9-10-2016 by Dwarvensilver]
[Edited on 9-10-2016 by Dwarvensilver]