Desarrollo y puesta a punto de una práctica de laboratorio para la asignatura química
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2016-07-12
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Jaén: Universidad de Jaén
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La finalidad del proyecto realizado, es conseguir que los alumnos de la asignatura “Química” de primer curso del Grado en Ciencias Ambientales, sean capaces de resolver un problema del medio ambiente, un problema del mundo real. En este proyecto, se estudia cómo varía la velocidad de una reacción de hidrólisis, en nuestro caso la hidrólisis del carbaril, con la variación del pH y de la temperatura. Para ello se sometió una muestra de una disolución de carbaril a diferentes pH y temperaturas y se tomaron las diferentes absorbancias durante 15 minutos con el espectrofotómetro UV-visible en modo cinético. A partir de los datos obtenidos del espectrofotómetro, hemos podido calcular la constante de velocidad K, y con ello la energía de activación y la semivida del producto en cuestión. Todo el estudio realizado, ha servido para planificar una práctica de laboratorio que desarrollarán los alumnos que cursan Química en 1º de Grado de Ciencias Ambientales.
The purpose of this project, is to ensure students of chemistry subject, are able to solve an environmental problem, a real problem. In this Project, the speed of a hydrolysis reaction is studied, specially, the hydrolysis of carbaryl, with pH and temperature variation. To show it, a carbaryl sample was submitted to different pH and temperatures and all the absorbances were taken for 15 minutes with the spectrophotometer UV-visible in Kinect mode. Because of the dates obtain from spectrophotometer, I have calculated the speed constant, K, and the activation energy and half-life of carbaryl. All the study I have done has helped us to plan a laboratory practice that the students of the first course of Environmental Science degree will develop.
The purpose of this project, is to ensure students of chemistry subject, are able to solve an environmental problem, a real problem. In this Project, the speed of a hydrolysis reaction is studied, specially, the hydrolysis of carbaryl, with pH and temperature variation. To show it, a carbaryl sample was submitted to different pH and temperatures and all the absorbances were taken for 15 minutes with the spectrophotometer UV-visible in Kinect mode. Because of the dates obtain from spectrophotometer, I have calculated the speed constant, K, and the activation energy and half-life of carbaryl. All the study I have done has helped us to plan a laboratory practice that the students of the first course of Environmental Science degree will develop.