De Svante Arrhenius ao peagâmetro digital: 100 anos de medida de acidez



Título del documento: De Svante Arrhenius ao peagâmetro digital: 100 anos de medida de acidez
Revista: Quimica nova
Base de datos: PERIÓDICA
Número de sistema: 000313457
ISSN: 0100-4042
Autores: 1
Instituciones: 1Universidade Federal do Rio de Janeiro, Instituto de Quimica, Rio de Janeiro. Brasil
Año:
Periodo: Feb
Volumen: 30
Número: 1
Paginación: 232-239
País: Brasil
Idioma: Portugués
Tipo de documento: Artículo
Enfoque: Descriptivo, divulgación
Resumen en inglés This work describes the establishment of the concept of pH and the evolution of its measurement. The origin of the pH definition can be found in the development of the chemistry of aqueous solutions during the XIXth century. The electrolytic dissociation theory by Svante Arrhenius played a central role. After the proposal of the pH scale by Sörensen, many years were necessary for the acceptance of this new parameter among chemists in general. Its importance was first recognized in biochemistry and related areas. Twenty years after, its importance had been recognized in many industrial and laboratorial practices. The previous methods were based on colorimetric and electrometric methods, but both suffered from many problems. Acceptance of pH in Chemistry was only possible after the development of experimental trustable measurements. The invention of the pH meter was the primordial step
Disciplinas: Química
Palabras clave: Historia de la química,
pH,
pHmetría,
Acidez
Keyword: Chemistry,
Chemistry history,
pH,
pHmetry,
Acidity
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