Week 30 – Types of Chemical Reactions

The Balancing Chemical Equations Gizmo ends by classifying chemical reactions into five different categories:

• Combination: A + B → C
  • Example: 2H₂ + O₂ → 2H₂O
• Decomposition: A → B + C
  • Example: 2H₂O₂ → 2H₂O + O₂
• Single Exchange: AB + C → A + CB
  • Example: K + H₂O → H₂ + KOH
• Double Exchange: AB + CD → AD + CB
  • Example: Na₂S + 2HCl → 2NaCl + H₂S
• Combustion: fuel burning in the presence of O₂
  • Example: CH4 + 2O₂ → CO₂ + 2H₂O

Our new learning for this week is to further investigate the types of chemical reactions.

1. Begin by reading Lesson 73 (Types of Reactions) in our online chemistry textbook.  Chemistry textbook login instructions are provided at the bottom of this post.
2. Next, review the Notes for the chemical reaction videos you will be watching and analyzing. This is important! Open it! Read it! You are about to watch a series of videos showing chemical reactions.  After each video, you will complete the following three multiple choice questions:
   • Which piece(s) of evidence did you observe that a chemical reaction has taken place?
   • Select the correct balanced equation.
   • What type of chemical reaction was this?
3. Practice watching and analyzing chemical reactions.  In this assignment, you will watch videos showing 5 different chemical reactions.  After each video, you will answer the three questions listed above and receive feedback for your answers.  The assignment is worth 10 points.  To earn full credit, put forth full effort. Click here for the Types of Chemical Reactions Assignment.
4. To receive credit, the assignment must be completed by Sunday, April 19 at 11:59pm.  
5. After completing the assignment, go back to the Week 30 – Types of Reactions page.

Chemistry Textbook Login Instructions:

• 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.

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