Leaving Cert Chemistry
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Nature of Matter and Atomic Structure
Everything around us is made of atoms.
Learn how matter is organised and how atomic structure explains the physical and chemical properties of substances by selecting one of the quizzes below.
01 Matter Part One
Reading
02 Matter Part Two
Reading
03 Atomic Structure Part One
Reading
04 Atomic Structure Part Two
Reading
05 Atomic Structure Part Three
Reading
06 Bohr Model of the Atom
Reading
07 Inside the Atom
Reading
08 Separation Techniques
Reading
09 Conservation of Mass
Reading
For open answer quizzes
Reading
Electronic Structure and Periodic Table
Think the Periodic Table is just a list of elements?
Think again!Choose a quiz below to discover the patterns, trends and electron arrangements that make chemistry make sense.
Chemical Bonding
Chemical bonding is the key to understanding the behaviour of substances.
Select a quiz below to explore ionic bonding, covalent bonding, intermolecular forces and molecular geometry.
01 The Octet Rule
Reading
02 Ionic Bonding Part One
Reading
03 Ionic Bonding Part Two
Reading
04 Covalent Bonding Part One
Reading
05 Covalent Bonding Part Two
Reading
06 Electronegativity Part One
Reading
07 Electronegativity Part Two
Reading
08 Intermolecular Forces
Reading
09 Shapes of Molecules Part One
Reading
10 Shapes of Molecules Part Two
Reading
Stoichiometry
Chemical bonding is the key to understanding the behaviour of substances.
Select a quiz below to explore ionic bonding, covalent bonding, intermolecular forces and molecular geometry.
Acids, Bases and pH
From lemon juice to bleach, acids and bases are all around us.
Discover how they behave and how chemists measure and use them.
Acid-Base Volumetric Analysis
Master one of chemistry's most important laboratory techniques.
Explore the preparation of solutions, serial dilutions and acid–base titrations.
Redox Reactions and Electrochemistry
Discover how electrons make chemistry happen.
Explore oxidation, reduction, electrochemical cells, electrolysis and fuel cells by selecting a quiz below.
01 Oxidation and Reduction Part One
Reading
02 Oxidation and Reduction Part Two
Reading
03 Oxidation Numbers Part One
Reading
04 Oxidation Numbers Part Two
Reading
05 Assigning Oxidation Numbers
Reading
06 Everyday Redox, Materials, and Sustainability
Reading
07 Galvanic Cells
Reading
08 Electrolysis Part One
Reading
09 Electrolysis Part Two
Reading
10 Primary and Secondary Cells
Reading
11 The Electrochemical Series
Reading
12 Fuel Cells
Reading
Redox Titrations
Discover how redox titrations are used to determine the amount of a substance in a solution.
Explore iron–manganate and iodine–thiosulfate titrations through interactive quizzes by selecting one below.
Rates of Reaction
Understand the principles of reaction rates, including the factors that affect them, collision theory, activation energy, and catalysis.
Explore practical investigations and learn to interpret reaction rate graphs through interactive quizzes by selecting one below.
01 Introduction to Reaction Rates
Reading
02 Factors Affecting Reaction Rate Part One
Reading
03 Factors Affecting Reaction Rate Part Two
Reading
04 Investigating the Calcium Carbonate - Hydrochloric Acid Reaction
Reading
05 Investigating the Sodium Thiosulfate - Hydrochloric Acid Reaction
Reading
06 Monitoring the Rate of Decomposition of Hydrogen Peroxide
Reading
07 Collision Theory and Activation Energy
Reading
08 Catalysis Part One
Reading
09 Catalysis Part Two
Reading
10 Reaction Rate Graphs and Data Analysis
Reading
11 Exam Style Questions
Reading
Chemical Equilibrium
Discover how reversible reactions reach a state of dynamic balance and why equilibrium is constantly shifting, not static.
Explore the equilibrium constant, calculations involving Kc, and Le Châtelier's principle through interactive quizzes by selecting one below.
01 Introduction to Chemical Equilibrium Part One
Reading
02 Introduction to Chemical Equilibrium Part Two
Reading
03 The Equilibrium Constant
Reading
04 Calculations Involving Kc Part One
Reading
05 Calculations Involving Kc Part Two
Reading
06 Le Châtelier's Principle
Reading
07 Temperature and the Equilibrium Constant
Reading
Organic Families
Get to know the major organic families — from alkanes through to esters.
These quizzes guide you through the structure, nomenclature, and key reactions of each homologous series, building a solid foundation in organic chemistry.
Select a quiz below to test your understanding.
01 Alkanes - Structure, Nomenclature and Isomerism
Reading
02 Alkanes - Physical Properties, Combustion and Reactivity
Reading
03 Alkenes - Structure, Nomenclature and Isomerism
Reading
04 Alkenes - Preparation, Properties and Reactions
Reading
05 Addition Reactions of Alkenes - Part One
Reading
06 Addition Reactions of Alkenes - Part Two
Reading
07 Alkynes - Structure, Nomenclature and Reactions
Reading
08 Aromatic Hydrocarbons - Structure, Properties and Reactions
Reading
09 Alcohols - Structure, Nomenclature and Classification
Reading
10 Alcohols - Reactions
Reading
11 Haloalkanes - Structure, Nomenclature and Reactions
Reading
12 Aldehydes - Structure, Nomenclature and Reactions
Reading
13 Ketones - Structure, Nomenclature and Properties
Reading
14 Aldehydes and Ketones - Reactions and Identification
Reading
15 Carboxylic Acids - Structure, Nomenclature and Properties
Reading
16 Carboxylic Acids - Reactions
Reading
17 Esters - Formation and Naming
Reading
18 Esters - Hydrolysis and Applications
Reading
Organic Mechanisms
Go beyond the functional groups and dive into the principles that govern organic reactions.
These quizzes cover reaction mechanisms, classification, schemes, acid-base chemistry, and the real-world applications found in soaps, natural products, and polymers.
Select a quiz below to begin.
19 The Preparation of Soap
Reading
20 Organic Reaction Type and Classification
Reading
21 Organic Reaction Schemes
Reading
22 Introduction to Organic Reaction Mechanisms
Reading
23 Addition and Free Radical Substitution
Reading
24 Elimination and Redox Reactions
Reading
25 Acids and Acid-Base Reactions
Reading
26 Organic Natural Products
Reading
27 Polymers
Reading
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