SCH4U - Chemistry 12 (2024-25) - A

SCH4U – Lesson Plan 1-5

Polarity

Lesson Big Idea:

Bonds and molecules can have polar or non-polar qualities.  The polarity of a molecule has important effects on its physical and chemical characteristics.

Ministry Expectations:

C2.3predict the shapes using the valence shell electron pair repulsion (VSEPR) model, and draw diagrams to represent their molecular shapes [AI, C]

C2.4 predict the polarity of various chemical com- pounds, based on their molecular shapes and the difference in the electronegativity values of the atoms [AI]

Learning Goals:

By the end of this lesson you will:

• Understand how to calculate differences in electronegativity values
• Understand how to predict bond dipoles
• Understand the connection between polarity and physical properties
• Be able to determine molecular polarity

Success Criteria:

I know I have achieved the learning goals when I:

• Can predict electronegativity values based on the periodic table
• Can calculate bond dipoles
• Determine the bond type based on EN
• Can determine molecular polarity

Assessments:

• Check your understanding – Molecular Polarity Simulation Lab (AfL)
• Embedded questions within learning activities (AfL)
• Assignment: Molecular Shapes & Polarity (AoL): 17 marks (17 marks Application)
• Journal (AaL)