What This Document Is
This document contains activities designed to accompany the “Chemical Equations” Gizmo from ExploreLearning. It’s a guided worksheet – Activities A & B – intended for students in General Chemistry I (CHEM 150) at California State University San Marcos. The activities focus on understanding chemical formulas, counting atoms, and the foundational principle of balancing chemical equations.
Why This Document Matters
This study guide is essential for students learning to represent chemical reactions accurately. It’s used during a specific Gizmo simulation to reinforce concepts covered in lecture. Successfully completing these activities is a stepping stone to more complex stoichiometry and chemical reaction work later in the course. It’s particularly helpful for visualizing how atoms are conserved during a chemical change.
Common Limitations or Challenges
This document *does not* teach the underlying principles of chemical bonding or reaction types. It assumes a basic understanding of atoms and molecules. It also doesn’t provide independent practice beyond the Gizmo simulation itself; it’s a tool to be used *with* the interactive Gizmo. It won’t substitute for understanding the law of conservation of mass.
What This Document Provides
This document includes:
* Prior Knowledge Questions to activate initial thinking about mass conservation.
* A “Warm-up” section introducing the law of conservation of matter in the context of chemical equations.
* Guided practice in interpreting chemical formulas and counting atoms, including examples with subscripts and parentheses.
* Practice problems for calculating the number of each element in various chemical formulas (AgCl, Cu, Ba(AsO3)2, etc.).
* Initial steps toward balancing chemical equations using the Gizmo interface.
This preview *does not* include the complete set of Gizmo exercises, the answer key, or detailed explanations of balancing techniques beyond the introductory level presented in Activity A. It also does not include Activity B.
