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# Stoichiometry

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Author: Jodi Doster
##### Description:

Stoichiometry is the study of the mass amounts of substances involved in a chemical reaction, expressed by a balanced chemical equations.

Students discover stoichiometry by looking at the mass change between products and reactants during a simple reaction with vinegar and baking soda. After developing the math necessary to understand the reaction, they repeat it, trying to increase the efficiency of the reaction. Balances are not used in the laboratory to measure moles calculations must be used.

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Tutorial

## Stoichiometry Lesson Using Backwards Design

UBD Tree outling stoichiometry lesson using backwards design in a flipped classroom.

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## Stoichiometry the Chemists Recipe

This podcast introduces the topic of stoichiometry explaining what stoichiometry is and how it is used.

Source: Hsu, Tom. "Chapter 11 Stoichiometry." A Natural Approach to Chemistry. Ronkonkoma, NY: Lab-Aids, 2010. N. pag. Print.

## Stoichiometry Tutorial Video

Tutorial working through the steps of stochiometry to calculate an unknown mass.

Source: Hsu, Tom. "Chapter 11 Stoichiometry." A Natural Approach to Chemistry. Ronkonkoma, NY: Lab-Aids, 2010. N. pag. Print.

## Web 2.0 Activity Lab 11 B Stoichiometry

Web 2.0 Activity

Using the Web 2.0 Tool http://www.vuvox.com/ Demonstrate Your Understanding of Percent Yield and Concentration (20 pts)

1. While conducting lab experiment 11 B Stoichiometry: Quantitative Precipitate use classroom camera's and document lab procedures.

2. Take photos of  tables and data taken in science notebook.

3. Use these materials and the your learning on stoichiometry theoretical  and percent yield to create vuvox web 2.0 media collage to explain the steps of your lab procedure and how to calculate percent yield from your experimental data.

3a. Create an account at http://www.vuvox.com

3b.  Watch these three introduction videos: Introduction Videos:

. ABOUT COLLAGE: What is it?

3 min

15.6 MB

. HOT SPOTS: Enrich with contextual areas.

45 sec

2.4 MB

. CUT-OUT: Introduction to cutting & masking.

3 min

7.7 MB

3d. Include an explanation of how this information might be used to design an efficient chemical reaction.

3e. You may use the Mobi's to write and draw on your images. You may also want to create a short video of your experiment or graphic to show steps used in determining theoretical and percent yield and how to design an efficient chemical reaction.

3f. Use your imagination, creativity, and above all have fun completing this learning experience. Remember I will be here to help guide as you navigate your way through this assignment.

Requirements:

Clear photos and/or video segment documenting experiments and data

Storyboard including photos and dialog to explain content

Combination of presentation of at least 3 styles i.e. video, recording, text, graphics, drawing with Mobi

Source: Hsu, Tom. "Chapter 11 Stoichiometry." A Natural Approach to Chemistry. Ronkonkoma, NY: Lab-Aids, 2010. N. pag. Print.

## NAC Ch 11 Sec1

PowerPoint for students to go over stoichiometry from Lab Aids a Natural Approach to Chemistry. Students will be required to go through presentation and take notes in their science notebooks including adding the examples provided.

Source: Hsu, Tom. "Chapter 11 Stoichiometry." A Natural Approach to Chemistry. Ronkonkoma, NY: Lab-Aids, 2010.

## Chapter 11 Section 2 Stoichiometry

Students will go through presentation as homework taking notes on percent yield and concentration in their science notebooks.

Source: Hsu, Tom. "Chapter 11 Stoichiometry." A Natural Approach to Chemistry. Ronkonkoma, NY: Lab-Aids, 2010.