Pourbaix Diagram Lead As can be seen from the Pourbaix diagram, lead has no stable passive species at pH > 10-11, and hence, lead is not particularly resistant to dilute alkalis, and will dissolve freely as the plumbite oxyanion. Where free access to carbon dioxide is available, a passivating salt film of lead carbonate may form.
Pourbaix Diagram Lead 2. Pourbaix diagrams are only one certain class of the phase diagrams, which gives a handy description of electrode potential v.s. pH. There are other dimensions of parameters that are not shown on the Pourbaix diagrams. For example, the activity of reactants other than H + , temperature, etc. The Pourbaix diagram is a projection of the
Pourbaix Diagram Lead of a Pourbaix diagram, which plots the ∆φ. for redox reactions vs pH of the chemical environment. Taking the first reaction (1.12) as an example, at voltages below -0.356V, any lead species will be reduced to lead metal. At voltages higher, some other species will be stable; this depends on whether
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