| abstract |
didactic device for teaching stoichiometry consisting of 28 pieces adapted from a common domino, each piece having a rectangular shape (1), containing a cross-sectional marking to the length of the half (2), which can be made of wood , thermoplastic, metal, cellulose or other material that allows the application of its configuration. On the upper side of the piece are printed characters formed by letters, numbers and graphic symbols (6), or Braille figures, which can be made in two or three dimensions. These printed figures represent reagents of a chemical reaction, and the products of the same reaction are printed on another part, also taking into account the stoichiometric coefficients (fig.3). Its embossed and Braille inscribed graphics allow players with or without visual impairment to handle it, making it possible to understand the stoichiometry content. |