| Revista: | Quimica nova |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000201399 |
| ISSN: | 0100-4042 |
| Autores: | Santos, Anderson R. dos1 Vidotti, Eliane C Silva, Expedito L Maionchi, Florangela Hioka, Noboru |
| Instituciones: | 1Universidade Estadual de Maringa, Departamento de Quimica, Maringa, Parana. Brasil |
| Año: | 2002 |
| Periodo: | Sep-Oct |
| Volumen: | 25 |
| Número: | 5 |
| Paginación: | 844-848 |
| País: | Brasil |
| Idioma: | Portugués |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, divulgación |
| Resumen en inglés | We intend to divulge an easy experiment that permits the determination of molar masses of various compounds by cryoscopy. The major advantage of this is the use of the tert-butyl alcohol as a solvent, which requires simple apparatus and easy procedures. The melting point of this alcohol is around 25 oC, which makes it easy to freeze and then melt the solutions. This solvent has a high cryoscopic constant and is miscible with both polar and non-polar compounds. The molar masses of acetone, water, chloroform, dichloro-methane, ethanol, hexane, carbon tetrachloride and toluene were determined. The results were good except for water. Even though there are reliable techniques of molar mass determination nowadays, this method is still frequently taught in undergraduate courses |
| Disciplinas: | Educación, Química |
| Palabras clave: | Educación superior, Fisicoquímica y química teórica, Química orgánica, Crioscopía, Masa molar, Solventes, Terc-butanol, Enseñanza experimental, Enseñanza |
| Keyword: | Education, Chemistry, Higher education, Organic chemistry, Physical and theoretical chemistry, Solvents, Tert-butyl alcohol, Experimental teaching, Teaching |
| Texto completo: | Texto completo (Ver HTML) |
