| Journal: | Quimica nova |
| Database: | PERIÓDICA |
| System number: | 000196018 |
| ISSN: | 0100-4042 |
| Authors: | Suyama, Emilio1 Paniago, Eucler B2 Carvalho, Sandra3 Couto, Braulio R.G.M4 |
| Institutions: | 1Universidade Federal de Minas Gerais, Departamento de Estatistica, Belo Horizonte, Minas Gerais. Brasil 2Universidade Federal de Ouro Preto, Departamento de Quimica, Ouro Preto, Minas Gerais. Brasil 3Universidade Federal de Minas Gerais, Departamento de Quimica, Belo Horizonte, Minas Gerais. Brasil 4Centro Universitario de Belo Horizonte, Departamento de Ciencias Exatas e Tecnologia, Belo Horizonte, Minas Gerais. Brasil |
| Year: | 2001 |
| Season: | Ene-Feb |
| Volumen: | 24 |
| Number: | 1 |
| Pages: | 5-9 |
| Country: | Brasil |
| Language: | Portugués |
| Document type: | Artículo |
| Approach: | Experimental |
| English abstract | The data analyzed in this work were generated following the methodology developed by Molina et al.(J. Electroanal. Chem., 1979) for the calibration of a potentiometric system of measurement of hydrogen-ion concentrations resulting from neutralizations, at 25 oC, of acidic or alkaline solutions at constant ionic strength (0.1 mol.l-1) held with NaClO4. The observed data present a serious deviation in relation to the mathematical model derived from the Nernst equation, for pH values ranging from 3 to 11, where pH=-log[H+]. We show that the minimization of the sum of the absolute values of the residuals gives estimates that are not influenced by outlying values |
| Disciplines: | Química |
| Keyword: | Química analítica, Calibración, Titulación, Titulación potenciométrica, Ion hidrógeno, Concentración, Neutralización, Soluciones, Ecuación de Nernst |
| Keyword: | Chemistry, Analytical chemistry, Calibration, Titration, Potentiometric titration, Hydrogen ion, Concentration, Neutralization, Solutions, Nernst equation |
| Full text: | Texto completo (Ver HTML) |
