For the final lesson of chapter 13, students learned to classify the types of reactions as combination, decomposition, single exchange, or double exchange reactions.

- Combination: A + B -> C
- Decomposition: A -> B + C
- Single Exchange: AB + C -> A + BC
- Double Exchange: AB + CD -> AD + CD

We focused primarily slide 8 of the Lesson 73 PowerPoint. Students are encouraged to review the full slide deck, including the vocabulary defined on slides 9-12. Students then received the Lesson 73 Worksheet and Toxic Reaction Cards to work on for the remainder of class. As an alternative, students who self-assessed as needing additional practice balancing equations were offered the opportunity to work through the Balancing Equations Gizmo.

**Homework:**

- Read Lesson 73 in the textbook. Log in and enter your username and password:
- Username: full student gmail address.
- Password: HighlineMM/DD (student birthday, use leading zero if needed, i.e. March 7 = 03/07)
- Forgot your password? Click here to reset your password. Enter your student gmail address and follow the instructions.

- Work through the practice problems at the end of Lesson 73.
- Please ask questions about anything from Lesson 73 you do not yet fully understand.

**Opportunities For Help Outside of Class:**

- Mr. Swart’s office hours: Mondays, Tuesdays, and Thursdays after school until at least 3:00 (later with advanced notice)
- Use the vast number of resources available on this website – check each lesson!
- Email Mr. Swart for help if staying after school is not possible
- Form a study group with other students to review concepts from class
- Attend MASH after school (M/T/Th in Library)
- Attend Math Lab after school (T/Th)