The differences between elements and compounds.
The different types of chemical reactions.
Understanding the different parts of the electromagnetic spectrum.
How to recognize different types of solutions.
Different ways to represent the concentration of a solution.
Understanding the differences between colloids and suspensions.
Understanding the colligative property of solutions that elevates boiling point.
Understanding the differences between empirical and molecular formulas.
Understanding the difference between homogeneous and heterogeneous equilibrium.