Learning Paths
Each learning path is one chapter: a guided route through a topic, one small course at a time. Pick a class to see its chapters in order.
Chapter 1Contains Standard content
Stoichiometry and Concentration, Measurement, Units and Significant Figures, Laws of Chemical Combination, The Mole Concept, Molecules, Ions and Formulae, Elements, Compounds and Changes
How many molecules are in a sip of water? How much oxygen does a gas burner need? Chemistry answers such questions by counting particles in a clever way, with the mole. In this chapter you learn to measure carefully and to report a measurement honestly, meet the laws that led to the idea of atoms, and then use moles to find formulas, to work out the amounts in a reaction and to make solutions of a given strength. Python does the long arithmetic, so you can think about the chemistry.
4 courses
Chapter 2
Mixtures, Solutions and Colloids, Separation of Mixtures, Elements, Compounds and Changes
A shop sells pure milk, pure butter and pure honey. Is the milk that you drink really pure in the way a chemist uses the word? In this chapter we learn what scientists mean by a pure substance, and how it differs from a mixture. We study solutions, suspensions and colloids, and the ways to separate the parts of a mixture. Then we meet the elements and the compounds that everything is made of. Python helps us with the calculations.
3 courses