The topics listed below may appear in a variety of first-year high school chemistry courses including college-prep Chemistry and Honors Chemistry. These help pages are based on the idea that you should immerse yourself in topics through problems. Rather than textbook explanations or notes these topics pages focus on understanding concepts through the typical types of problems you might encounter.


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Preview of the topic pages: Density | Limiting reactant

Chemistry Help Topics

Matter and Measurement

States of Matter

Density

Scientific Notation

Units

Dimensional Analysis (Unit Conversions)

Significant Figures

... Counting

... Addition & Subtraction

... Multiplication & Division

Accuracy vs. Precision


Atomic & Electronic Structure/

Periodic Table

Isotopic Notation

Periodic Trends

... Atomic radius trend

... ion radius trend

... ionization energy

... electron affinity trend

... metallic nature trend

Shielding / Zeff

Orbitals

Electron Configuration

Quantum numbers

Paramagnetism and Diamagnetism

Introduction to Light

UV-VIS spectroscopy


Nomenclature

Ionic compounds

Covalent/ Molecular Compounds

Acids

Simple Organic


Bonding and Intermolecular Forces (IMFs)

Lewis Structures

Expanded Octet

Resonance

Formal Charge

VSEPR Theory

Polarity

Intermolecular Forces

... London Dispersion

... Dipole-Dipole

... Hydrogen bonding

... Ion-Dipole

Solubility

Surface Tension

Capillary Action

Boiling Point Comparison


The Mole

Molar Mass

Mass Percent

Avogadro's Number

Empirical Formula

... by Percent Composition

... by mass

Combustion Analysis

Molecular Formula





Chemical Reactions

Balancing Equations

Balancing Combustion Equations

Types of Reactions, Intro

Single Replacement

Precipitation/ Double Replacement


Stoichiometry

Stoichiometry, General

Molar Ratio

Limiting reactant

Excess reactant

Gas stoichiometry (at STP)

Gas stoichiometry (PV=nRT)

Solution stoichiometry

Other stoichiometry

Percent Yield/ Percent Error


Gas Behavior

Gas Laws

... Combined Gas Law

... Boyle's Law (P,V)

... Charles' Law (T,V)

... Gay-Lussac's Law (T,P)

... Avogadro's Law (V,n)

Ideal Gas Law

Kinetic Molecular Theory

Dalton's Law of Partial Pressures

Graham's Law

Maxwell-Boltzmann distribution

Real vs. Ideal gas behavior

Van der Waals equation


Solutions

Molarity

Preparing a solution

Dilution (moles)

Dilution (volume)

Solubility rules

Molecular, Net Ionic Equations

Colligative properties


Thermochemistry

Heat Flow

Energy diagrams

Thermochemical equations

Heating/ Cooling curves

Specific Heat Capacity

Hess's Law

Enthalpies of formation

Bond enthalpies


Kinetics

Collision Theory

Rate Comparisons

Integrated Rate Law

Differential Rate Law


Equilibrium

Equilibrium

Equilibrium Expression

Calculating K

K vs Q

Le Chatelier's Principle


Acids & Bases

Definitions

Conjugate Acids & Base Pairs

Autoionization of water

pH Scale

Relative strength

Strong Acid/ Base

Ka and Kb

Common Ion Effect

Buffer

Titration

... Strong Acid w/ Strong Base

... Weak acid w/ Strong base

... Weak base w/ Strong acid

Indicators

pH salts


Entropy and Free Energy

Entropy

Gibb's Free Energy

G and Temperature


Redox and Electrochemistry

Oxidation numbers

Half Reactions

Balancing Redox reactions

Voltaic cells

Cell potential (standard conditions)

Cell potential (non-standard)

Electrolysis