Stoichiometry is a topic that many teacher find difficult to teach and for
many students, difficult to learn. In this project-based workshop, students will
learn stoichiometry principles from the perspective of making paint. Paints are
made up of three components: a pigment, a binder, and a thinner. In the
water-based paint created in this module, the binder is calcium carbonate, an
insoluble precipitate made from the double-displacement reaction between aqueous
solutions of calcium chloride and sodium carbonate. When mixed in stoichiometric
amounts, an insoluble precipitate, calcium carbonate, forms. Students use
stoichiometry to quantify the correct amounts of aqueous reactants to make a
desired amount of binder, then mix their own paint using pigment and water as a
thinner. The project culminates in a class quilt made up of students'
individually painted tiles.
TAKEAWAYS:
Stoichiometry does not have to be an anxiety-producing, tear-jerking unit. When taught in chewable chunks, students gain an appreciation for its importance in daily life. In this workshop, students learn concepts that are tied to an end-product art project.
SPEAKERS:
Caroline Gochoco-Tsuyuki (Archbishop Riordan High School: San Francisco, CA)