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AUS-e-TUTE is an interactive learning resource being developed by experienced science teachers to provide free tutorials suitable for high school students.
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Links to free AUS-e-TUTE Tutorial Topics

Fundamental Skills

Maths for Chemistry Students

Significant Figures
Scientific (exponential) Notation
Temperature Conversions
Mass Conversions
Volume Conversions
Density Calculations

Classification of Matter

Pure Substances and Mixtures
Elements and Compounds
Allotropes
History of the Elements
Metals and Non-Metals
Physical and Chemical Changes

Periodic Table

History of the Periodic Table
Interactive Periodic Table
Trends in Electron Configuration
Trends in Ionization Energy
Trends in Atomic Radius
Trends in Electronegativity
Trends in Group 1 (IA)
Trends in Group 2 (IIA)
Trends in Group 17 (VIIA)
Trends in Period 2
Trends in Period 3

Atomic Structure

Brief History of Atomic Theory
Electron Configuration
Quantum Numbers

Evidence for Electronic Configuration

First Ionization Energy

Chemical Formula

Naming Ionic Compounds
Writing Ionic Formula
Name and Formula of Covalent Compounds
Empirical and Molecular Formula

Chemical Equations

Balancing Chemical Equations
Writing Precipitation Reaction Equations

Stoichiometry (Chemical Calculations)

Relative Molecular Mass (Formula Weight)
Calculating Percentage (Percent) Composition
Definitions of a Mole
Mole-Number of Particle Calculations
Mass-Mole Calculations
Molar Gas Volume Calculations
Molarity of Solutions
Dilution Calculations
Reaction Calculations: Mass and Moles
Limiting Reagents and Reactants in Excess
Yield

Bonding

Lewis Structures (electron dot diagrams)
Shapes of Molecules
Electronegativity and Bond Polarity
Molecule Polarity
Intramolecular Forces
Metallic Bonding
Ionic Bonding
Covalent Bonding
Intermolecular Forces
Melting and Boiling Point
Solubility

Organic (Carbon) Chemistry

Nomenclature (Naming)

Summary of Nomenclature
Straight Chain Alkanes
Branched Chain Alkanes
Simple Alkenes
Simple Alkynes
Structural Isomers of Alkanes
Structural Isomers of Alkenes
Alkanols (alcohols)
Haloalkanes (alkyl halides)
Functional Groups

Reactions

Combustion of Hydrocarbons
Halogenation of Hydrocarbons
Hydrohalogenation of Unsaturated Hydrocarbons
Hydration of Alkenes to Alkanols (alcohols)
Oxidation of Alkanols (alcohols)
Dehydration of Alkanols (alcohols)
Preparation and Naming of Esters (Esterification)
Substitution Reactions of Haloalkanes (alkyl halides)
Polymers and Polymerization

Properties and Uses

Alkanes
Carboxylic (alkanoic) Acids
Amines
Ethene (ethylene)
Polythene (polyethylene)

Biochemistry (Biological Chemistry)

Biomolecules
Carbohydrates (sugars)
Lipids (fats and oils)
Amino Acids
Proteins
Enzymes
DNA
Reactions
Fermentation
Reducing & Non-reducing Sugars
Applications
Chemistry of Blood

Inorganic Chemistry (Transition Metal Chemistry)

Transition Metal Properties
Ligands and Complex Ions

Solid-State Chemistry

Silicates: Structure and Formula
Zeolites

Physical Chemistry

Gas Laws

Gay-Lussac's Law of Combining Gas Volumes
Avogadro's Principle
Boyle's Law (Mariotte's Law)
Charles' Law
Combined Gas Equation
Ideal Gas Law
Kinetic Theory of Gases
Dalton's Law of Partial Pressures
Graham's Laws of Effusion and Diffusion

Thermochemistry (Energy)

Theory
Defining Enthalpy Change
Energy Profiles (diagrams)
Manipulating Enthalpy Change Terms
Hess's Law (Additivity of Heats of Reaction)
Heat (Enthalpy) of Formation and Reaction
Bond Energy and Heat of Reaction
Heat (Enthalpy) of Combustion
Latent Heat (Enthalpy)
Heat Capacity Calculations
Heat (Enthalpy) of Reaction
Calorimetry
Applications
Fuel Definitions

Chemical Kinetics

Rate of Reaction
Using Rate Law
Determining Rate Law

Electrochemistry

Concepts
Oxidation and Reduction
Writing cell half-equations
Oxidation Numbers (States)
Displacement Reactions (Activity Series)

Galvanic (Voltaic) Cells
Electrochemical (Voltaic/Galvanic) Cells
Calculating Electrochemical Cell EMF (voltage)

Applications
Corrosion
Batteries
Fuel Cells

Electrolysis
Electrolytic Cell Concepts
Electrolysis of Molten Salts
Electrolysis of Aqueous Salt Solutions
Faraday Laws of Electrolysis
Applications (also see Metallurgy)
Production of Sodium Hydroxide
Advanced Electrochemistry
Nernst Equation

Equilibrium