Stoichiometry - Creating A Fizzy Drink
Time: 16 days (days are based on 50 min period length)
High School Honors Chemistry
This unit is not arranged as a traditional stoichiometry unit. Rather than beginning by stating the law of conservation of mass to students, it begins with an inquiry lab for students to discover that law. All quantities in this lab will be measured in grams. This will lead to a discussion of grams versus moles -- when each unit is appropriate and why. After students have developed this basic understanding, they will be presented with an in-class lab demonstration and subsequent simulation involving limiting reactants. Limiting reactants will be used to help students understand the most efficient ratios needed in a chemical equation that will produce maximum product. Students use this same logic and apply it in order to balance chemical equations. After they have mastered balancing, they will be presented with a challenge to solve several multi-step dimensional analysis problems. Then they will apply this same method and their knowledge of grams, moles, and balancing equations in order to solve stoichiometry problems.
The pre-assessment should be completed before beginning lesson 1.
This unit consists of 10 lessons overall. Lessons range from 50-100 minutes in length.
|1||Introduction to the Phenomenon||50 minutes|
|2||Inquiry Lab - Discovering the Law of Conservation of Mass||100 minutes|
|3||Grams vs. Moles|
|4||Limiting Reagents Dictate Molar Relationships (Simulation)||100 minutes|
|5||Introduction to Balancing Chemical Equations (Simulation)||100 minutes|
|6||Balancing Chemical Equations Practice|
|7||Cookie Stoichiometry - Solving Multi-step Dimensional Analysis Problems|
|9||Evaluating Stoichiometry Problems|
|10||Lab Practical - Creating a Fizzy Drink|
Lesson 1: Introduction to the Phenomenon
Students are asked to create a carbonated beverage (fizzy drink) without the aid of an at home soda maker such as a SodaStream. Is this possible using chemicals that are safe to consume and would not affect the overall taste of the beverage other than imparting it with carbonation?
Lesson 2: Discovering the Law of Conservation of Mass
- Physical Science
- [HS-PS1 ] Matter and its Interactions
- NGSS Crosscutting Concept
- NGSS Practice
- Using Mathematics
Computational Thinking in STEM
- Modeling and Simulation Practices
- Assessing Computational Models
- Using Computational Models to Understand a Concept
- Systems Thinking Practices
- Defining Systems and Managing Complexity
- Thinking in Levels
- Understanding the Relationships within a System
- Data Practices
- Analyzing Data
Computational Thinking in Science and Math
Lesson 4: Grams vs. Moles
When are grams an appropriate measurement, when are moles necessary, and how can we convert between the two units?