Els sensors conductimètrics al laboratorio de química

espanolEl present treball mostra com l’us dels instruments sofisticats de recollida i analisi de dades faciliten el treball i el proces d’ensenyament aprenentatge dels alumnes en el laboratori. El nivell d’aplicacio ha estat el de quart curs de la Llicenciatura en Ciencies Quimiques i la practica assajada ha estat la “Valoracio conductimetrica d’acid acetilsalicilic en aspirina” La metodologia ha seguit un proces de comparacio. Aixi, mentre una parella del conjunt del grup de practiques ha usat un equip d’experimentacio assistida per ordinador (EXAO) consistent en un sensor conductimetric connectat a l’ordinador, la resta ha realitzat la valoracio conductimetrica de la manera tradicional. En finalitzar la sessio de practiques s’ha demanat els alumnes que donen una opinio de l’us de l’EXAO. EnglishThis work shows how the use of sophisticated instruments of data acquisition and analysis facilitate the work and the students? process of learning in the laboratory. This project has been applied in a laboratory subject of the fourth year in the Chemistry degree and the practice tested was "Conductivity titration of acetylsalicylic acid in aspirin". The methodology has undergone a process of comparison. Thus, while two students have used the computer-assisted software (EXAO), which consists in a conductometric sensor connected to the computer, the rest of students have done the conductometric analysis in the traditional way. The students have given their opinion about the use of EXAO at the end of the laboratory session.