| Revue: | Quimica nova |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000313457 |
| ISSN: | 0100-4042 |
| Autores: | Gama, Michelle da Silva1 Afonso, Julio Carlos |
| Instituciones: | 1Universidade Federal do Rio de Janeiro, Instituto de Quimica, Rio de Janeiro. Brasil |
| Año: | 2007 |
| 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 |
| Texte intégral: | Texto completo (Ver HTML) |
