ribeiro dos santos

This work was born out of the desire to contribute to and build a meaningful education for both the student and the educator. To educate for life, with meaning, an understanding of the world and the applicability of knowledge in everyday life so that chemistry is understood and comprehended in the formation of citizens. So, first of all, I would like to thank God, the builder of life, the master of knowledge; my parents, who are now absent, who gave me the opportunities and the unconditional and immortal love they dedicated to me throughout their beautiful earthly passages; I would also like to thank the rest of my family and friends for their collaboration, understanding and dedication; and the teachers for their exchange of knowledge and ethical behaviour. I dedicate this study to my great friend and teacher Daniel Rodrigues Vieira, who left so soon, but left his great contribution to my personal and professional development.