AP Unit 3: Properties of Substances and Mixtures

Find these readings by topic

This earlier reading list remains available with its complete tasks. The current book places these resources in the following topic chapters:

• Chemical quantities and reaction language →

  Connect particle counts, masses and solution amounts to balanced reactions, then construct a model that conserves atoms and charge.

• States of matter and gases →

  Explain bulk properties, phase arrangements and gas behavior with particle models whose assumptions and controlled variables are explicit.

• Solutions and solubility →

  Explain what is dissolved, how particle counts represent concentration, and how interactions and later equilibrium conditions determine solubility.

• Chemical measurement and laboratory evidence →

  Choose and interpret separation, spectroscopy, concentration and titration measurements, then explain what their controls and errors allow you to infer.

• Energy transfer and enthalpy →

  Track energy across a stated system boundary and use heat, phase and reaction ledgers to explain measured and calculated enthalpy changes.

• Reaction rates and mechanisms →

  Use controlled rate evidence to test proposed molecular pathways, keeping concentration sensitivity, barriers and thermodynamic favorability distinct.