Middle school1/4 lessons published
Chemical transformations
Identifying a chemical reaction, writing its equation, balancing. Mass conservation as the central principle.
- Lesson 018 minComing soon
Reactants and products
Identifying what reacts and what forms. Characteristic tests (limewater, copper sulfate, pH paper).
- Lesson 029 min
Mass conservation
Lavoisier's law: nothing is lost. How it follows from atom conservation. First balancing exercises.
- Lesson 039 minComing soon
Simple chemical equations
Writing a chemical equation, balancing by adjusting stoichiometric coefficients. Standard cases of the curriculum.
- Lesson 048 minComing soon
Combustion reactions
Complete and incomplete combustion, role of dioxygen. Combustion of carbon, methane, iron.