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Total Duration:
91 to 120 Minutes
Materials and Resources:
Bonds Types and Physical Properties Lab Sheet (Alabama Science In Motion)
(Following items provided by Alabama Science in Motion)
well plate, 24-hole
sodium chloride
small test tubes
magnesium sulfate
Mel-Temp/capillary tubes
stearic acid
thermometer
vanillin
water
cooking oil
isobutanol
Safety Equipment: Always wear safety glasses and an apron in the lab. The Mel-Temp can become very hot. Avoid touching the metal surfaces.
Technology Resources Needed:
Computer with Internet Access
Background/Preparation:
Students will need to know the difference between covalent and ionic bonds and what types of elements make them up.
Students should know the difference between physical and chemical properties.
Students should be familiar with polar and nonpolar molecules and how they affect the strength of bonds.
Day 1:
Engage Activity:
Students will complete the Bond Types and Physical Properties lab from Alabama Science in Motion. Their goal is to create a ranking of their substances from the lowest melting point to the highest. Lab procedure and lab sheet are available to view in attachments.
Day 2
Explore/Explain Activity:
During this time, students will be divided up into four groups. They will complete a jigsaw activity where they are researching the 4 types of intermolecular forces that act on compounds within small groups. After each group completes their research, they will come back together in different groups to turn, talk and share their specific intermolecular force that they have researched with other members of the group. To conduct their research, they will complete a quick write which is simply made up of the definition of their force as well as 2 compound examples.
Explain
The last part of the lesson is to have students reference back to their original Bond Types and Physical properties lab to check if they placed each of their compounds into a specific intermolecular force category. For example, which of the 4 intermolecular forces will Vanillin fall under based on the information gained during your research. Students will follow the Intermolecular Jigsaw Activity sheet and complete each of the parts inside their Chemistry notebook. See attached Jigsaw Activity handout.
Assessment Strategies
Students will first be observed on their laboratory skills and the information collected during their lab.
Each student group should have collected melting points and solubilities on each compound. Also, they should have arranged each from the highest melting point to the lowest.
Students will be monitored during their group research and on how they interact within each of their groups.
Students should answer the questions given on the Intermolecular Forces worksheet in the attachment section.These questions should be answered for all types of intermolecular forces.
Students will be assessed on this comparison information that should be written in their Chemistry notebooks.
Acceleration:
Intervention:
View the Special Education resources for
instructional guidance in providing modifications and adaptations
for students with significant cognitive disabilities who qualify for the Alabama Alternate Assessment.