Lesson 5: Physical Properties of Compounds
Overview:
Having established a foundation of bonds, we will apply the concepts learn to review concepts such as boiling point, melting point, solubility in water, and electrical conductivity.
Curriculum Expectations:
Overall Expectations:
B1. Analyse the properties of commonly used chemical substances and their effects on human health and the environment, and propose ways to lessen their impact.
B2. Investigate physical and chemical properties of elements and compounds, and use various methods to visually represent them.
Specific Expectations:
B1.1 Analyse, on the basis on research, the properties of a commonly used but potentially harmful chemical substance (e.g., fertilizer, pesticide, a household cleaning product, materials used in electronics and batteries) and how that substance affects the environment, and propose ways to lessen the harmfulness of the substance (e.g., by reducing the amount used, by modifying one of its chemical components) or identify alternative substances that could be used for the same purpose.
B1.2 Evaluate the risks and benefits to human health of some commonly used chemical substances (e.g., chemical additives in foods; pharmaceuticals; cosmetics and perfumes; household cleaning products).
B2.1 Use appropriate terminology related to chemical trends and chemical bonding, including but not limited to: electronegativity, and electron affinity.
B3.5 Compare and contrast the physical properties of ionic and molecular compounds (e.g., NaCl and CH4; NaOH and H2O).
B1. Analyse the properties of commonly used chemical substances and their effects on human health and the environment, and propose ways to lessen their impact.
B2. Investigate physical and chemical properties of elements and compounds, and use various methods to visually represent them.
Specific Expectations:
B1.1 Analyse, on the basis on research, the properties of a commonly used but potentially harmful chemical substance (e.g., fertilizer, pesticide, a household cleaning product, materials used in electronics and batteries) and how that substance affects the environment, and propose ways to lessen the harmfulness of the substance (e.g., by reducing the amount used, by modifying one of its chemical components) or identify alternative substances that could be used for the same purpose.
B1.2 Evaluate the risks and benefits to human health of some commonly used chemical substances (e.g., chemical additives in foods; pharmaceuticals; cosmetics and perfumes; household cleaning products).
B2.1 Use appropriate terminology related to chemical trends and chemical bonding, including but not limited to: electronegativity, and electron affinity.
B3.5 Compare and contrast the physical properties of ionic and molecular compounds (e.g., NaCl and CH4; NaOH and H2O).
Success Criteria:
Time Allocation: 3 hours
Learning Activities:
Read Nelson 3.1 - Molecular Compounds
Read Nelson 3.3 - Polar Bonds and Polar Molecules
Read Nelson 3.4 - Intermolecular Forces
Read Nelson 3.5 - Hydrogen Bonding and Water
Read Nelson 3.6 - Green Chemistry in Action: Choosing the Right Materials
Read Nelson 3.3 - Polar Bonds and Polar Molecules
Read Nelson 3.4 - Intermolecular Forces
Read Nelson 3.5 - Hydrogen Bonding and Water
Read Nelson 3.6 - Green Chemistry in Action: Choosing the Right Materials
In the playlist below, video:
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Molecule Shapes
Description Explore molecule shapes by building molecules in 3D! How does molecule shape change with different numbers of bonds and electron pairs? Find out by adding single, double or triple bonds and lone pairs to the central atom. Then, compare the model to real molecules! Learning Goals
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Molecule Polarity
Description When is a molecule polar? Change the electronegativity of atoms in a molecule to see how it affects polarity. See how the molecule behaves in an electric field. Change the bond angle to see how shape affects polarity. See how it works for real molecules in 3D. Learning Goals
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Task:
Solve questions 1, 2, 3, 4 and 5 from Nelson 3.3 Review on page 108.
Solve questions 1, 2, 3, 4, 5 and 7 from Nelson 3.4 Review on page 115.
Solve questions 1, 2 and 3 from Nelson 3.5 Review on page 118.
Solve questions 1, 2, 3, 4, 5 and 7 from Nelson 3.4 Review on page 115.
Solve questions 1, 2 and 3 from Nelson 3.5 Review on page 118.
