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Nov 23, 2023
Abstract
The students of the educational level of high school present difficulties for a good comprehension, retention, learning and managing of the balance of Chemical equations. For that reason in this work we present a didactic proposal that can solve the difficulties that the pupils have in the subject of chemistry at any school year who study the representations of the Chemical reactions, observing the quantification and the law of the conservation of the matter. In this work appears an alternative to introduce the pupil of chemistry I to the concepts of balance of Chemical equations, based on something that they can manipúlate, I State something, sound as like spikes, screws and socket-pans, in order that later they construct and associate the ideas to reach what
represents a formula, this which composed of something as simple as a spike and a nut, they will be able to represent it as a Symbol AB, And later to take it up to a molecule like CO who joins almost of equal way, as the spike and the nut, or as the spike and two nuts, which represent the molecule of C02, and that fínally construct an arrangement of a spike, three nuts and two socket-pans, for to come to the similar one, with the compound represented like H2C03, Which can determine its molar mass, and then it is established that the amount of spikes, nuts and socket-pans that was used at the beginning is the same that was used at the end of assembled with the arrangement. The relationship of masses of each arrangement is established and the analogy o f the following molecular formula AB3C2 is arranged like C2AB3, which is compared with the molar mass of H2C03.
