Dissemination of IT for the Promotion of Materials Science (DoITPoMS)

DoITPoMS Teaching & Learning Packages The Nernst Equation and Pourbaix Diagrams Example 2
The Nernst Equation and Pourbaix Diagrams AimsBefore you startIntroductionBackgroundThe Nernst equationConstruction of a Pourbaix DiagramAnatomy of a Pourbaix DiagramExamples of a Pourbaix DiagramConstructing a 3D Pourbaix DiagramSummaryQuestionsGoing further
TLP creditsTLP contentsShow all content
Viewing and downloading resourcesAbout the TLPsTerms of useFeedbackCredits Print this page
PreviousNext

Example 2

Find the electrochemical reaction for an equilibrium between NO3- and NO.

1. Write reduced species on right

NO3-  →   NO

2. Balance nitrogen atoms

NO3-  →   NO

3. Balance oxygen atoms with water

NO3-  →   NO + 2 H2O

4. Balance hydrogen atoms with hydrogen ions

NO3-  + 4 H + →   NO + 2 H2O

5. Balance charge with electrons

NO3-  + 4 H + + 3e- →   NO + 2 H2O

Check: Each side of the equation has: One N, three O, four H and zero residual charge – so it is balanced.

PreviousNext