AP Chemistry · Unit 3
Properties of Substances and Mixtures
In short
Unit 3: Properties of Substances and Mixtures in AP Chemistry covers 13 topics: Intermolecular and Interparticle Forces, Properties of Solids, Solids, Liquids, and Gases, Ideal Gas Law and 9 more. Open each one for what you need to know, a self-check list and how it is tested on the exam.
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What is in Unit 3: Properties of Substances and Mixtures?
Unit 3: Properties of Substances and Mixtures
3.1 Intermolecular and Interparticle Forces
3.2 Properties of Solids
- I can relate the vapor pressure, boiling point, and melting point of a substance to the strengths and types of intermolecular forces present.
- I can use particulate-level representations to communicate how intermolecular interactions establish macroscopic properties.
- I can explain the properties of ionic solids, such as low vapor pressure, high melting/boiling points, brittleness, and conditional electrical conductivity, based on strong interactions between ions.
- I can describe the structure and properties of covalent network solids (e.g., diamond, graphite, silicon dioxide) and explain their high melting points and rigidity based on strong covalent interactions.
- I can explain why molecular solids generally have low melting points and do not conduct electricity, based on their weak intermolecular forces and tightly held valence electrons.
- I can explain the properties of metallic solids (conductivity, malleability, ductility) and alloys based on the presence of free valence electrons and the arrangement of metal cores.
- I can describe how noncovalent interactions dictate the shape, functionality, and properties of large biomolecules or polymers.
3.3 Solids, Liquids, and Gases
3.4 Ideal Gas Law
3.5 Kinetic Molecular Theory
- I can describe the distribution of kinetic energies of particles at a given temperature using a Maxwell-Boltzmann distribution.
- I can relate the average kinetic energy of a particle to its average velocity using the equation KE = ½ mv².
3.6 Deviation from Ideal Gas Law
3.7 Solutions and Mixtures
3.8 Representations of Solutions
- I can use particulate models for mixtures to represent interactions between components and represent the relative concentrations of components.
3.9 Separation of Solutions and Mixtures
- I can use a chromatogram to infer the relative polarities of components in a mixture.
3.10 Solubility
- I can state that substances with similar intermolecular interactions tend to be miscible or soluble in one another.
3.11 Spectroscopy and the Electromagnetic Spectrum
3.12 Properties of Photons
3.13 Beer-Lambert Law
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Properties of Substances and Mixtures: common questions
What is in Unit 3: Properties of Substances and Mixtures?
It covers 13 topics: 3.1 Intermolecular and Interparticle Forces; 3.2 Properties of Solids; 3.3 Solids, Liquids, and Gases; 3.4 Ideal Gas Law; 3.5 Kinetic Molecular Theory; 3.6 Deviation from Ideal Gas Law; 3.7 Solutions and Mixtures; 3.8 Representations of Solutions; 3.9 Separation of Solutions and Mixtures; 3.10 Solubility; 3.11 Spectroscopy and the Electromagnetic Spectrum; 3.12 Properties of Photons; 3.13 Beer-Lambert Law.
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