IB Chemistry investigates the composition, properties, and reactions of matter. You'll explore both the theoretical principles and practical techniques that underpin modern chemistry, from atomic structure to organic reactions. Chemistry links well with other sciences and is a key subject for students considering careers in health, engineering, and the natural sciences.
Logical problem-solving and critical thinking
Laboratory techniques and safe handling of chemicals
Data interpretation, graphing and mathematical modelling
Scientific communication using correct terminology
Awareness of how chemistry impacts society and the environment
Offered at both Standard Level (SL) and Higher Level (HL), with HL including extra content and depth.
Core Topics (SL & HL):
Stoichiometry – chemical formulas, equations, and reacting masses
Atomic Structure – models of the atom, subatomic particles
Periodic Table – trends, group reactivity, and electron arrangements
Chemical Bonding and Structure – ionic, covalent, metallic bonding
Energetics/Thermochemistry – energy changes in reactions
Kinetics – rates of reaction and factors affecting them
Equilibrium – dynamic systems and Le Châtelier’s principle
Acids and Bases – strength, pH calculations, titrations
Redox Processes – oxidation, reduction, electrochemistry
Organic Chemistry – hydrocarbons, reactions, naming compounds
Measurement and Data Processing – error analysis, significant figures
Additional HL Topics:
Further organic chemistry and reaction mechanisms
Advanced bonding and periodicity
More complex redox and energetics topics
Deeper exploration of kinetics and equilibrium
Practical Work:
Internal Assessment (IA): You’ll plan, carry out, and evaluate your own chemistry investigation.
Group 4 Project: A collaborative science project with students from other IB science subjects
Internal Assessment (IA)
Same for HL and SL
Individual Investigation (20%)
You’ll carry out your own chemistry experiment and submit a written report (6–12 pages), demonstrating lab skills, data analysis, and scientific reasoning.
External Assessment
For Standard level (SL):
Paper 1: Duration: 1 hour and 30 minutes Weighting: 36% Marks: 55
Paper 1A—30 marks (30 multiple-choice questions on standard level material only)
Paper 1B—25 marks (Data-based questions and Questions on experimental work)
Paper 1A and Paper 1B are to be completed together without interruptions.
Paper 2: Duration: 1 hour and 30 minutes Weighting: 44% Marks: 50
Short-answer and extended-response questions on standard level material only.
For Higher level (HL):
Paper 1: Duration: 2 hours Weighting: 36% Marks: 75
Paper 1A — 40 marks (40 multiple-choice questions on standard level and additional higher level material)
Paper 1B — 35 marks (Data-based questions and Questions on experimental work)
Paper 1A and Paper 1B are to be completed together without interruptions.
Where Can This Subject Take You?
Chemistry is essential or highly recommended for:
Tertiary Courses: Medicine, Dentistry, Pharmacy, Chemical Engineering, Biomedicine, Environmental Science, Veterinary Science
Careers: Pharmacist, Doctor, Environmental Chemist, Biotechnologist, Materials Scientist, Food Chemist, Lab Analyst, Chemical Engineer
It’s a cornerstone subject for many university science programs, especially in health and chemical engineering.
IBO Chemistry Subject Overview