Explaining Reaction Rates
How do we explain Reaction Rates?
The factors of concentration and surface area go hand in hand with collision theory to help explain why they speed up or slow down reactions from taking place. Activation energy, temperature of the reaction system, and catalyst theory all deal with lowering the energy barrier that needs to be crossed to push reactants to change into products.
adapted from:
DiGiuseppe, M., Haberer, S., Salciccioli, K., Sanader, M., & Vavitsas, A. (2012). Nelson Chemistry 12 University preparation. Toronto, ON: Nelson Education Ltd.
The factors of concentration and surface area go hand in hand with collision theory to help explain why they speed up or slow down reactions from taking place. Activation energy, temperature of the reaction system, and catalyst theory all deal with lowering the energy barrier that needs to be crossed to push reactants to change into products.
adapted from:
DiGiuseppe, M., Haberer, S., Salciccioli, K., Sanader, M., & Vavitsas, A. (2012). Nelson Chemistry 12 University preparation. Toronto, ON: Nelson Education Ltd.
LESSON OVERVIEW (SPECIFIC EXPECTATIONS: D2.1, D3.5, D3.6)
Lesson Hook/Minds On:
Show the video clip in the link below to engage students by demonstrate a violent 'volcano-resembling' reaction. Afterwards, initiate a brief discussion by asking students:
"Why do you think the splint needed to be lit to allow the reaction to take place?"
Show the video clip in the link below to engage students by demonstrate a violent 'volcano-resembling' reaction. Afterwards, initiate a brief discussion by asking students:
"Why do you think the splint needed to be lit to allow the reaction to take place?"
Teaching Strategy:
Students will be divided into 10 groups and each group will be assigned one of the following topics: collision theory, temperature of the reaction system, chemical nature of reactants, concentration and surface area, and catalyst theory. There will be tow groups assigned per topic. In their group, students will read and/or research their topic ideally with internet access but can resort to their textbooks if that is a problem. Then each group will summarize their topic in 6 points on a chart paper. This can be done as a mind map or simply bullet points. The groups with the same topic will then combine their work and present to the rest of the class the top 6 points they came up with between them. The link below takes you to a website with thorough information on all these topics if students need a starting place and/or textbooks are unavailable.
Students will be divided into 10 groups and each group will be assigned one of the following topics: collision theory, temperature of the reaction system, chemical nature of reactants, concentration and surface area, and catalyst theory. There will be tow groups assigned per topic. In their group, students will read and/or research their topic ideally with internet access but can resort to their textbooks if that is a problem. Then each group will summarize their topic in 6 points on a chart paper. This can be done as a mind map or simply bullet points. The groups with the same topic will then combine their work and present to the rest of the class the top 6 points they came up with between them. The link below takes you to a website with thorough information on all these topics if students need a starting place and/or textbooks are unavailable.
Consolidation:
As a consolidation, display each groups chart paper around the class and have the students do a gallery walk. Encourage students to jot down a few notes as they do so as it will help them to prepare for the next evaluation.
As a consolidation, display each groups chart paper around the class and have the students do a gallery walk. Encourage students to jot down a few notes as they do so as it will help them to prepare for the next evaluation.
FOPP: Leadership in learning communities and professional knowledge
Click below for a few resources that can be used in conjunction with a lesson to further demonstrate the concepts explaining reaction rates.