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3-5B: Applications of Rates of Reaction
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This activity is not counted for grades. It is a self-assessment activity.
Learning Goals
Scientific Investigation Skills and Career Exploration(A1)
- I will be able to demonstrate scientific investigation skills (related to both inquiry and research) in the four areas of skills (initiating and planning, performing and recording, analysing and interpreting, and communicating)
Energy Changes and Rates of Reactions (D2, D3)
- I will be able to analyse technologies and chemical processes that are based on energy changes, and evaluate them in terms of their efficiency and their effects on the environment
- I will be able to investigate and analyse energy changes and rates of reaction in physical and chemical processes, and solve related problems
- I will be able to demonstrate an understanding of energy changes and rates of reaction
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Forum Instructions
In this assignment, you will select a chemical process in which controlling reaction rates is critical. You will identify and describe the chemical reaction involved, identify the factor that is impacting the rate of reaction, and identify whether the reaction is endothermic or exothermic. You will present your findings in a forum post that is 100-150 words long.
TASK:
Step #1: Select a Reaction
Select one of the processes below to research.
- Storage of food in a refrigerator or freezer.
- Grain dust explosions in a flour mill.
- Decomposition of organic matter in a home composter.
- Combustion of fuel in an internal combustion engine.
- Use of a catalyst in an industrial process such as the Haber Process
- The deterioration of the ozone layer by CFCs.
- The slowing down of metabolism at lower temperatures in living things.
- Cooking of food in a pressure cooker.
Step 2: Make a Hypothesis
- Identify the factor that is responsible for controlling the reaction rate.
- Write a hypothesis about how the factor impacts the process. Explain your reasoning using course concepts.
Step 3: Research
- Locate 1-2 credible resources about your process.
- Research the process and answer the following questions:
- Identify the chemical reaction involved. Identify the reactants, products, and possible catalysts.
- Identify the factor that is involved in controlling the reaction rate in the situation listed. Describe how the rate of reaction is affected by temperature, surface area, nature of reactants, concentration etc.
- Explain how Hess’s Law, Le Chatelier's Principle, and the Kinetic Molecular Theory play a role in the rate of the chemical reaction.
- Describe the role of activation energy in your reaction.
- Identify whether the reaction is endothermic or exothermic.
Step 4: Presentation
- Write a 100-150 word forum post that presents the findings of your research and explains the role that controlling the rate of reaction plays in the process.
- Cite your source(s). Provide in-text citations and a proper APA citation at the end of your post.
Step 5: Respond to a Post
- Respond to at least one other post using the two stars and a wish format:
- Identify two positive aspects of the forum post. You can share your thoughts about their response, elements you found surprising or interesting, or anything else you want to share.
- Express one wish about what your course-mate might do next time to improve another aspect of the work.
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| Success Criteria
You can assess your work against the success criteria that is listed here:
- I can apply my knowledge of reaction rates to explain a chemical reaction.
- I can develop a hypothesis and predict how factors impact the reaction rate of a chemical reaction.
- I can explain how the rate of reaction rate was increased/decreased.
- I can explain how Hess’s Law, Le Chatelier's Principle, or Kinetic Molecular Theory plays a role in increasing/decreasing rate of reaction
- I can use appropriate terminology related to the rates of reaction to communicate my ideas.
- I can organize and present my ideas in a logical manner.
- I can conduct research and use a variety of sources to gather information and cite my sources using APA format.
Make sure your POST and RESPONSE meet all the Level 4 criteria listed below:
| Knowledge |
Level 0 (0-49%) |
Level 1 (50-59%) |
Level 2 (60-69%) |
Level 3 (70-79%) |
Level 4 (80-100%) |
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Understanding of concepts
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Student meets little or none of the requirements
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Student demonstrates limited understanding of concepts
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Student demonstrates some understanding of concepts
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Student demonstrates considerable understanding of concepts
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Student demonstrates thorough understanding of concepts
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| Inquiry |
Level 0 (0-49%) |
Level 1 (50-59%) |
Level 2 (60-69%) |
Level 3 (70-79%) |
Level 4 (80-100%) |
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| Use of critical/creative thinking processes, skills, and strategies |
Student meets little or none of the requirements
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Student uses critical/ creative thinking processes, skills, and strategies with limited effectiveness |
Student uses critical/ creative thinking processes, skills, and strategies with some effectiveness |
Student uses critical/ creative thinking processes, skills, and strategies with considerable effectiveness |
Student uses uses critical/ creative thinking processes, skills, and strategies with a high degree of effectiveness |
| Communication |
Level 0 (0-49%) |
Level 1 (50-59%) |
Level 2 (60-69%) |
Level 3 (70-79%) |
Level 4 (80-100%) |
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| Expression and organization of ideas and information in written forms |
Student meets little or none of the requirements |
Student expresses and organizes ideas and information with limited effectiveness |
Student expresses and organizes ideas and information with some effectiveness |
Student expresses and organizes ideas and information with considerable effectiveness |
Student expresses and organizes ideas and information with a high degree of effectiveness |
| Application |
Level 0 (0-49%) |
Level 1 (50-59%) |
Level 2 (60-69%) |
Level 3 (70-79%) |
Level 4 (80-100%) |
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| Making connections between science, technology, society, and the environment |
Student meets little or none of the requirements |
Student makes connections between science, technology, society, and the environment with limited effectiveness |
Student makes connections between science, technology, society, and the environment with some effectiveness |
Student makes connections between science, technology, society, and the environment with considerable effectiveness |
Student makes connections between science, technology, society, and the environment with a high degree of effectiveness |
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How to Post
- This activity is meant to be completed by you in your own words. It is meant to bring out your own thoughts and ideas. Please ensure that you keep citations to a minimum and that you follow the academic policies that are outlined in your Academic Integrity contract
- Don't forget: Always use polite language and a respectful tone. Your grading teacher will monitor this forum.
- A sample post is shown below. You may use it for guidance, but your own posts must show your own individual thinking.
- When you are ready to post, click on the "Add a new discussion topic" button located at the bottom on this page.
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