General Chemistry 1
Affectionately known as “Gen Chem,” first-year General Chemistry is for undergraduates who are just beginning their college-level studies in chemistry. This page is for the first semester in the sequence.
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Course Topics
The topics listed below frequently appear in a first-semester undergraduate Organic Chemistry course (commonly referred to as Orgo or O-Chem). These review pages are built on the principle that mastery of O-Chem comes from active problem-solving rather than passive reading. Instead of dense textbook chapters or lecture transcripts, these pages focus on building intuition for organic mechanisms and reactivity by guiding you through the standard problem types you'll face. It builds on high school fundamentals while introducing more rigorous problem-solving skills, deeper conceptual understanding, and a greater emphasis on scientific reasoning.
Measurement and Problem-Solving
unit conversions
scientific-notation calculations
significant-figure calculations
accuracy and precision comparisons
percent-error calculations
temperature conversions
density calculations
graphical data analysis
Matter and Atomic Structure
matter classification
physical-versus-chemical changes
intensive-versus-extensive properties
conservation-of-mass problems
subatomic-particle counting
isotope notation
ion-charge determination
average atomic-mass calculations
isotopic-abundance calculations
Formulas and Nomenclature
ionic-compound naming
ionic-formula writing
molecular-compound naming
molecular-formula writing
acid naming
acid-formula writing
hydrate naming
polyatomic-ion identification
oxidation-state determination
The Mole and Chemical Composition
molar-mass calculations
mass-to-mole conversions
mole-to-particle conversions
mass-to-particle conversions
percent-composition calculations
empirical-formula determination
molecular-formula determination
combustion-analysis problems
hydrate-formula determination
Chemical Equations and Reaction Types
equation balancing
reaction classification
product prediction
state-symbol assignment
oxidation-number assignment
redox-reaction identification
oxidizing-agent identification
reducing-agent identification
Stoichiometry
mole-to-mole calculations
mass-to-mass calculations
particle-to-particle calculations
limiting-reactant determination
excess-reactant calculations
theoretical-yield calculations
percent-yield calculations
multistep stoichiometry
mixture-composition problems
Aqueous Reactions
molarity calculations
dilution calculations
ion-concentration calculations
solution-mixing calculations
solubility-rule applications
precipitate prediction
complete ionic equations
net ionic equations
neutralization stoichiometry
introductory titration calculations
Gases
pressure-unit conversions
Boyle’s-law calculations
Charles’s-law calculations
combined-gas-law calculations
ideal-gas-law calculations
gas-density calculations
molar-mass determination
gas-stoichiometry problems
partial-pressure calculations
gas-over-water corrections
Major Topic: Thermochemistry
Subtopics:
heat-flow identification
calorimetry calculations
specific-heat calculations
heat-capacity calculations
reaction-enthalpy calculations
Hess’s-law calculations
formation-enthalpy calculations
bond-enthalpy calculations
internal-energy calculations
pressure-volume work
Quantum Theory
wavelength-frequency conversions
photon-energy calculations
electromagnetic-spectrum identification
hydrogen-transition calculations
emission-spectrum interpretation
de Broglie-wavelength calculations
quantum-number validation
orbital identification
orbital-capacity determination
Electron Configurations and Periodicity
Electron Configuration
ion-configuration writing
orbital-diagram construction
Paramagnetism and dimagntism
Atomic Trends (radius, ion radius, ionization, electonegativity)
Ionic Bonding
ionic-formula prediction
Lewis-symbol construction
ion-charge prediction
Coulombic-attraction comparisons
lattice-energy ranking
Born–Haber-cycle calculations
ionic-radius comparisons
ionic-property prediction
Covalent Bonding
Lewis-structure drawing
formal-charge calculations
preferred-structure selection
resonance-structure drawing
octet-exception identification
bond-order determination
bond-length ranking
bond-strength ranking
bond-polarity prediction
bond-enthalpy calculations
Molecular Geometry and Bonding
Lewis Structures
Molecular & Electron Geometry (VESPR, bond angle)
Molecular Polarity
Hybridization & Orbital overlap
Molecular Orbital diagrams
molecular-polarity determination
hybridization assignment
sigma-bond counting
pi-bond counting
magnetic-property prediction
Major Topic: Intermolecular Forces and Phases
Subtopics:
intermolecular-force identification
boiling-point ranking
vapor-pressure ranking
viscosity ranking
surface-tension ranking
phase-change energy calculations
heating-curve calculations
phase-diagram interpretation
Clausius–Clapeyron calculations
unit-cell density calculations
"Working through the topic pages step by step made concepts click that I'd been stuck on for weeks."
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