Latimer diagrams hydrogen

Perhaps even more important is the effect of hydrogen ion concentration on the emf of a half-reaction of a particular species. Consider the permanganate ion as an oxidizing agent in acid solution (as it often is). From the Latimer diagram above we can readily see that the reduction emf is 1.51 V when all species have unit activity. What is not shown is the complete equation ... 

On page 834, the statement is made Hydrogen xenate ions disproportionate in alkaline solution to yield perxenates. . . . " Can you confirm this assertion based on the Latimer diagrams for xenon ... 

Use the standard voltages in the Latimer diagrams for hydrogen in acidic and basic solutions to construct Frost diagrams. 

The Latimer diagram for hydrogen in acidic solution is in Section 8.1.4. The substance with the element in the zero oxidation state (H2) is the reference point (0,0) in the Frost diagram. Two other points need to be derived. The oxidation state change for each reduction of adjacent species in the Latimer diagram is —1. 

In order to illustrate the approach suggested above, it is of value to consider a specific case. Visible or near-UV excitation of the complex RuCbpy results in excitation and formation of the well-characterized metal to ligand charge transfer (MLCT) excited state Ru(bpy)32+. The consequences of optical excitation in the Ru-bpy system in terms of energetics are well established, and are summarized in eq. 1 in a Latimer type diagram where the potentials are versus the normal hydrogen electrode (NHE) and are... 

There are two main methods of summarizing the thermodynamic stabilities of the oxidation states of elements in aqueous solution, known after their inventors. Latimer and Frost diagrams are usually restricted to the two extremes of standard hydrogen ion (pH = 0) or hydroxide ion (pH = 14) solutions. 

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