**Homework:**

- Read Lesson 79 in the textbook. Login via hs.saplinglearning.com and enter your username and password:
- Username: wahps****s-####### (**** = first 4 letters of your last name and ####### = student number). Remember to include the dash between s and #.
- Password: S-####### (the S must be capitalized)

- Work through the practice problems at the end of Lesson 79.
- Please ask questions about anything from Lesson 79 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 in Room 124)

Next, students had the remainder of the class period to work through the Relative Mass and the Mole POGIL packet. Key concepts from textbook lessons 76-78 are distilled into a PowerPoint slide deck from students who desire additional review.

**Class Notes:**

**Video Review:**

**Homework:**

- Read Lessons 76-78 in the textbook. Login via hs.saplinglearning.com and enter your username and password:
- Username: wahps****s-####### (**** = first 4 letters of your last name and ####### = student number). Remember to include the dash between s and #.
- Password: S-####### (the S must be capitalized)

- Work through the practice problems at the end of Lessons 76-78.
- Please ask questions about anything from Lessons 76-78 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 in Room 124)

Notes from the whiteboard:

**Homework:**

- Read Lesson 75 in the textbook. Login via hs.saplinglearning.com and enter your username and password:
- Username: wahps****s-####### (**** = first 4 letters of your last name and ####### = student number). Remember to include the dash between s and #.
- Password: S-####### (the S must be capitalized)

- Work through the practice problems at the end of Lesson 75.
- Please ask questions about anything from Lesson 75 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 in Room 124)

- Continue forward with Lesson 74: Toxicity
- Conduct an experiment focused on the combustion reaction

Students elected to learn about the combustion reaction, so we reviewed the combustion of propane and balanced the equation, then carried out an experiment in which a candle (made of paraffin wax, another hydrocarbon) is combusted under a bell jar. We timed how long the candle burned for, and also measured the amount of oxygen and carbon dioxide in the room (before combustion) and under the bell jar (after the candle extinguished.

Next, we wrote the chemical equations for combining hydrogen peroxide and bleach (producing oxygen) and for combining baking soda and vinegar (producing carbon dioxide). We evaluated the effect of combustion in the presence of excess oxygen or carbon dioxide, measuring how long the candle burned as our endpoint. Class notes are provided below.

We will return to our regularly scheduled programming (lesson 74) tomorrow!

]]>**Which substance do you think is most toxic to you –**

**Alcohol (ethanol, C2H6O)****Aspirin (salicylic acid, C7H8O3)****Arsenic (III) oxide (As2O3)**

**Explain your thinking**

We then identified the LD50 values for all three substances using the Lethal Doses Handout. We discussed the meaning of LD50 (the lethal dose at which 50% of rats die after exposure to a given amount of a substance, often expressed in mg/kg) and students were shown a Material Safety Data Sheet (MSDS) for water (toxic at >90 mL/kg), providing students with evidence that all substances are toxic at high enough levels. Students then received the Lesson 74 Worksheet to work on during class time.

**Notes from class:**

**Extend Your Learning!**

Wondering about how scientists define the kilogram? Turns out the way we define the kilogram just changed late last year. Read about it at PBS.org or watch the video below:

**Homework:**

- Read Lesson 74 in the textbook. Login via hs.saplinglearning.com and enter your username and password:
- Password: S-####### (the S must be capitalized)

- Work through the practice problems at the end of Lesson 74.
- Please ask questions about anything from Lesson 74 you do not yet fully understand.

**Opportunities For Help Outside of Class:**

- 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 in Room 124)

- 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.

Notes from the whiteboard:

**Homework:**

- Read Lesson 73 in the textbook. Login via hs.saplinglearning.com and enter your username and password:
- Password: S-####### (the S must be capitalized)

- 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:**

- 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 in Room 124)

Notes from the whiteboard:

**Extra Practice!**

For students who would like additional instruction around balancing equations and enjoy learning by watching videos, I recommend Tyler DeWitt’s videos Introduction to Balancing Equations (above) and Balancing Chemical Equation Practice Problems (below):

**Homework:**

- Read Lesson 72 in the textbook. Login via hs.saplinglearning.com and enter your username and password:
- Password: S-####### (the S must be capitalized)

- Work through the practice problems at the end of Lesson 72.
- Please ask questions about anything from Lesson 72 you do not yet fully understand.

**Opportunities For Help Outside of Class:**

- 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 in Room 124)

Notes from the whiteboard (lab stations):

**Homework:**

- Read Lesson 71 in the textbook. Login via hs.saplinglearning.com and enter your username and password:
- Password: S-####### (the S must be capitalized)

- Work through the practice problems at the end of Lesson 71.
- Please ask questions about anything from Lesson 71 you do not yet fully understand.

**Opportunities For Help Outside of Class:**

- 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 in Room 124)

**Extend Your Learning!**

**Homework:**

- Read Lesson 70 in the textbook. Login via hs.saplinglearning.com and enter your username and password:
- Password: S-####### (the S must be capitalized)

- Work through the practice problems at the end of Lesson 70.
- Please ask questions about anything from Lesson 70 you do not yet fully understand.

**Opportunities For Help Outside of Class:**

- 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 in Room 124)

]]>