Enseñanza de la estequiometría: uso de analogías y comprensión conceptual

This work makes a connection between the teaching of stoichiometry, analogies and the conceptual resolution of chemistry problems. A didactic sequence on the topic is drawn up, progressive in difficulty. This sequence, based on analogies, is applied by first year university students. The experience is evaluated by means of a written questionnaire, where, amongst others, Nurrenbern and Pickering's (1987) 2 conceptual stoichiometry items figure (Nurrenbern y Pickering, 1987). The results show only partial understanding of the subject since some difficulties expressed in the bibliography were not overcome. To what extent and under which conditions analogies are helpful in the learning of this subject are discussed.