| 词条 | Latimer diagram |
| 释义 |
A Latimer diagram of an element is a summary of the standard electrode potential data of that element. This type of diagram is named after Wendell Mitchell Latimer, an American chemist. ConstructionIn a Latimer diagram, the most highly oxidized form of the element is on the left, with successively lower oxidation states to the right. The species are connected by arrows, and the numerical value of the standard potential (in volts) for the reduction is written at each arrow. For example, for oxygen, the species would be in the order O2 (0), H2O2 (–1), H2O (-2)): The arrow between O2and H2O2 has a value +0.68 V over it, it indicates that the standard electrode potential for the reaction: O2(g) + 2{{hsp}}H+ + 2{{hsp}}e− ⇄ H2O2(aq) is 0.68 volts. ApplicationLatimer diagrams can be used in the construction of Frost diagrams, as a concise summary of the standard electrode potentials relative to the element. Since ΔrG A simple examination of a Latimer diagram can also indicate if a species will disproportionate in solution under the conditions for which the electrode potentials are given: if the potential to the right of the species is higher than the potential on the left, it will disproportionate. See also
References
2 : Electrochemistry|Potentials |
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