Eletrodo de hidrogênio: o que há nos livros didáticos além de E¸ = 0?

Química Nova

Wanda De Oliveira¹  Peter Wilhelm Tiedemann¹  Renato Giovanni Cecchini¹  Viktoria Klara Lakatos Osorio¹ 

[1] ,Universidade de São Paulo Instituto de Química São Paulo SP ,Brasil

关键词: hydrogen electrode;    standard conditions;    Nernst equation;   

DOI  :  10.1590/S0100-40422009000400041

来源: SciELO

【 摘 要 】

The results of an exercise on electrochemistry for General Chemistry students are presented. The difficulty encountered by students in predicting the shift in the potential of the hydrogen electrode under non-standard conditions prompted a search in textbooks on how the subject is developed. Besides several instances of inconsistencies in defining the standard state, such as including the temperature in the definition, a number of incorrect depictions of the hydrogen electrode were discovered. Of the 28 General Chemistry books, 16 Physical Chemistry books and 24 Internet pages, 30, 20 and 46%, respectively, showed devices that would not work in practice.

【 授权许可】

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