Pick a topic to read the concept summary, then answer practice questions with instant feedback and worked solutions.
🎓 Take it further with the OChem Mastery Pack — $15
The printable companion to these drills: a high-yield study guide, printable reaction summary sheets, and an Anki-importable flashcard deck. One-time purchase, lifetime access.
📖 What's inside the OChem Mastery Pack
- Study guide — all 8 topics, exam-focused, with worked examples & common pitfalls.
- Reaction summary sheets — printable SN1/SN2, E1/E2 & alkene-addition cheat sheets.
- Flashcard deck — 88 cards, Anki-importable.
👀 Sample — Topic 1: Structure & Bonding
- Carbon has 4 valence electrons → 4 bonds.
- sp³ = tetrahedral (109.5°) · sp² = trigonal planar (120°) · sp = linear (180°).
- Formal charge = valence e⁻ − lone-pair e⁻ − ½(bonding e⁻).
- Bond polarity follows electronegativity: F 4.0 > O 3.5 > N 3.0 > C 2.5 > H 2.2.
🃏 Sample flashcards
- Hybridization of carbon in methane (CH₄)? → sp³
- Bond angle in a tetrahedral (sp³) carbon? → 109.5°
- Most electronegative element (Pauling)? → Fluorine (~4.0)
…plus 8 full topics and 88 cards in the complete pack.