### Summary

This lesson is a basic introduction to setting up a chemical equation. This could be part of a unit for physical science and can be done as a refresher or opener in chemistry for chemical equations.

### Essential Question(s)

What happens to atoms during chemical reactions?

### Snapshot

**Engage**

Students identify what they know about chemical reactions and watch a phenomenon on a reaction between a lit candle and water.

**Explore**

Students organize and decide reactants and products for various scenarios.

**Explain**

Students watch a video of the different types of reaction.

**Extend**

Students apply and demonstrate the different types of chemical reactions.

**Evaluate**

Students explain their understanding of matter flow in a reaction using the I Used to Think, But Now I Know strategy.

### Materials

Setup that allows videos and slideshows to be played for everyone to view

Lesson Slides (attached)

Bell Ringers & Exit Ticket handout (attached; one per student)

Chemical Equations Card Sort (attached; one per group)

Types of Chemical Reactions Notes (attached; one per student)

Chemical Equations Chat Stations - Physical Science (attached; one per student)

Chemical Equations Chat Stations - Chemistry (attached; one per student)

### Engage

10 Minute(s)

Use the attached **Lesson Slides** to follow along with the lesson. Begin with **slide 3. **Briefly, read aloud the essential question:* How are atoms conserved during a chemical reaction? *Then, move to **slide 4 **and share the learning objectives with students to the extent you feel necessary.

Display **slide 5**. Start with the Bell Ringer** **strategy. Pass out the **Bell Ringer & Exit Ticket **handout. Ask students to write down three things they know about chemical reactions. After students have written their responses, place students with an Elbow Partner to share what they know and develop a group summary. Select one student from each group to share their summary. This is a good time to evaluate students' prior experience related to the topic

**Have students save the handout to complete the Exit Ticket at the end of the lesson.**

### Explore

10 Minute(s)

Scaffold students to remember the set up for a chemical reaction and write it on the board as they figure it out. Once students have given their final response, display **slide 6** to affirm where the reactants and products fall for an equation.

Organize students into groups of 3-4 and pass out the **Chemical Equations Card Sort cards**. Instruct students not to open their cards until after you've finished giving the instructions. Go to** slide 7**. Tell students that they will complete a Card Sort grouping the correct card and using them to create the correct equations for five scenarios. When they are finished, review the correct matches with the students by displaying slide **8-12**. First group to complete all 5 sets of the card sorts wins.

Transition to **slide 13-14** and have students use the QR code/link to complete the survey.

### Explain

10 Minute(s)

Move to **slide 16**, pass out the attached **Types of Chemical Reactions Notes handout **and have students take notes of the different types of reactions and examples. Invite students to watch Daisy Tarot’s The 5 Different Types of Chemical Reactions video as they fill out their note catcher. When the video is over, give students 5 minutes to share their definition to one another in a group of 2-4. Finally call on a group to share out their definition for a reaction. The equation for single and double replacements are not mentioned in the video so have students double check that they have the equations from the video along with adding the two that are missing on **slide 17**.

Consider going over a few example problems provided on** slide 18**.

Al2S3 -> 2Al + 3S (decomposition)

C4H12 + 7O2->4CO2 +6H20 (combustion)

2NaOH + CuSO4-> Na2SO4 + CU(OH)2 (double replacement)

Have students use their fingers to show you which reaction they believe it is *1-synthesis*, *2-decomposition*, *3-combustion,* *4-single replacement,* *5-double replacement.* Quickly assess student responses and then call on one student to say which reaction and why they choose it.

### Extend

15 Minute(s)

Physical Science Instructions: Display **slide 19**. Invite students to participate in the Chat Stations strategy. Move students into groups of 3-5, make copies and pass out the** Chemical Equations Chat Stations-Physical Science** handout. Assign each group a station to start their first example. Inform students to discuss within their group the correct type of reaction and add it to their handout along with writing down the equation. Inform students that they can try to figure out how to balance the equation for extra credit if they so choose. Students will use the product they come up with to determine the next station to go solve.

Chemistry Instructions: Display **slide 20**. Invite students to participate in the Chat Stations strategy. Move students into groups of 4, make copies and pass out the **Chemical Equations Chat Stations-Chemistry **handout. Assign each group a station to start their first example. Inform students they will have 5 minutes at their station to discuss within their group the correct product for the reactant(s) they have and to use the molecular model kit to create a representation of the Lewis Dot structure of the product(s). Finally, have students write down the full equation and disassemble the molecular model's **products only **for the next group. Students can balance the equation on their handout for extra credit, if they wish. Once time is called, have students move to the next station.

### Evaluate

5 Minute(s)

Move to **slide 21.** Instruct students to return to their **Bell Ringer & Exit Ticket** from the beginning of the lesson. Have students complete the I Used to Think... But Now I Know* *activity comparing what they used to think about chemical reactions. Instruct them to include their opinion on the Essential Questions posed at the beginning:* What happens to atoms during chemical reactions?*

Transition to **slide 22-23** and have students use the QR code/link to complete the survey.

### Resources

Flexbooks 2.0. (2022, Aug 8). CK-12 CBSE Chemistry class. https://flexbooks.ck12.org/cbook/cbse-chemistry-class-10/section/1.4/primary/lesson/combination-reactions/

K20 Center. (2020, Sept 16). Bell ringers and exit tickets. Strategies. https://learn.k20center.ou.edu/strategy/125

K20 Center. (2020, Sept 16). Card sort. Strategies. https://learn.k20center.ou.edu/strategy/147

K20 Center. (2021, April 14). Chat Stations. Strategies. https://learn.k20center.ou.edu/strategy/944

K20 Center. (2020, Sept 16). Elbow partners. Strategies. https://learn.k20center.ou.edu/strategy/116

K20 Center. (2020, Sept 16). I used to think . . . but now I know. Strategies. https://learn.k20center.ou.edu/strategy/137

Tarot, Daisy. (2017, June 8).

*The 5 Different Types of Chemical Reactions*. [Video]*YouTube*. https://www.youtube.com/watch?v=92XUa76AZ6c&t=2s