General Chemistry
Free general chemistry guides
Worked examples and practice problems with answers. Each guide ends with a few questions you can check yourself.
Guides
- How to draw Lewis structures, step by step: Count valence electrons, check formal charges, and try six practice questions with full solutions.
- Limiting reagent practice problems: How to find the limiting reagent step by step, with a worked example, theoretical yield, leftover excess, and practice problems with answers.
- ICE table practice problems: How to set up an ICE table for equilibrium, when the small-x shortcut works, and worked practice problems with answers.
- Stoichiometry practice problems: The grams-to-moles-to-grams route, percent yield, and eight practice problems with full solutions.
- Acid-base titration practice problems: pH before, at, and after equivalence for strong and weak acids, plus indicator choice and curve reading.
- VSEPR molecular geometry practice: Count electron domains, place lone pairs, and name the shape for molecules from CO2 to XeF4.
- Net ionic equations practice: Split strong electrolytes, cancel spectator ions, and write precipitation, neutralization, and gas-forming reactions.