What is IB Chemistry HL vs SL?

IB Chemistry HL (240 hours) covers more depth and additional content compared to SL (150 hours). Both cover Structure 1 & 2 and Reactivity 1 & 2 but HL goes deeper in atomic theory, bonding, energetics, and kinetics. HL has Paper 3 which tests deeper analytical and data-based questions. HL is required for Medicine, Pharmacy, Chemical Engineering, and many Biochemistry programmes at top universities.

How is IB Chemistry assessed?

IB Chemistry SL: Paper 1A (MCQ, 45 min, 20%), Paper 1B (data-based, 45 min, 20%), Paper 2 (extended response, 1h15m, 40%), IA (20%). IB Chemistry HL: Paper 1A (MCQ, 1h, 20%), Paper 1B (data-based, 1h, 20%), Paper 2 (extended response, 2h15m, 36%), Paper 3 (HL only, 1h, 24%). No separate IA at HL — same 20% IA component.

What is the IB Chemistry Internal Assessment?

The IB Chemistry IA is an individual scientific investigation of approximately 10 pages worth 20% of the final grade. Students design an experiment, collect data, analyse results, and evaluate their method. Marked on: Exploration, Analysis, Evaluation, and Communication. Choosing a focused, measurable research question is critical — our IB Examiner tutors guide every stage including data analysis and error evaluation.

Chemistry Physics Biology

IB Group 4 — Sciences

IB Chemistry Tutoring by Active IB Examiners

Expert 1-on-1 online tutoring for IB Chemistry HL and SL. Full coverage of the new Structure & Reactivity syllabus. IA lab report guidance, data analysis coaching, and Paper 1/2/3 exam technique by IB Examiners who mark the real papers.

Book Free Demo Class View Syllabus →

✓ HL & SL both covered ✓ IA lab report guidance ✓ New 2023 syllabus ✓ Free first class

Book Free Demo Class

Active IB Examiners · 24hr response · No commitment

Book Free Demo

Get IB Chemistry help from active IB Examiners

Free first class. No credit card. HL & SL. New 2023 syllabus. IA guidance. Response within 24 hours.

✓ IB Chemistry HL & SL — new syllabus

✓ IA lab investigation guidance

✓ Paper 1A, 1B, 2 & 3 (HL) coaching

✓ Data booklet mastery

✓ Sessions recorded on Sev7n LMS

Book Free IB Chemistry Demo

Responds within 24 hours.

About IB Chemistry

What is IB Chemistry HL & SL?

IB Chemistry is a Group 4 science subject that develops students' understanding of chemical structure, bonding, reactivity, and analytical techniques. The 2023 revised syllabus reorganises content into two main strands — Structure (models of matter and bonding) and Reactivity (thermodynamics, kinetics, equilibrium, and mechanisms).

IB Chemistry HL (240 hours) goes significantly deeper — additional content in electron configuration, organic mechanisms, spectroscopy, and HL-only Paper 3. SL (150 hours) covers core content. HL is required for Medicine, Pharmacy, Chemical Engineering, Biochemistry, and Dentistry at most top universities.

The Internal Assessment (IA) is an individual scientific investigation worth 20% of the final grade. Students design an experiment, collect and process data, and evaluate their method. Our IB Examiner tutors guide the full IA process — from research question through to final error analysis.

⚗️ New 2023 syllabus — fully covered

All Sev7n IB Chemistry tutors are trained on the new 2023 revised syllabus (Structure & Reactivity). If your school is still on the old syllabus, we cover both.

🎓

Required for Medicine & STEM

IB Chemistry HL is required by most universities for Medicine, Pharmacy, Chemical Engineering, Biochemistry, and related sciences.

📊

Data booklet mastery

The IB Chemistry data booklet contains all the constants and equations. Knowing which page to turn to under exam pressure — and which formula to apply — is itself a skill our tutors coach.

🔬

IA — experimental design matters

Students often lose marks on IA because their research question is too broad or their methodology has uncontrolled variables. Our examiners guide focused, markable experimental design from the start.

⚗️

Organic chemistry — the hardest section

Organic mechanisms (SN1, SN2, addition, elimination, condensation) are consistently the most dropped marks in IB Chemistry. Sev7n tutors dedicate specific sessions to mechanism mastery.

IB Chemistry Syllabus

Structure & Reactivity — all strands covered

The new 2023 IB Chemistry syllabus is organised into Structure and Reactivity strands. Both HL and SL content covered — HL additions clearly marked.

Structure 1

Models of the Particulate Nature of Matter

Atomic structure Electron configuration Periodicity Nuclear chemistry HL: Quantum numbers HL: Periodic trends depth

Sub-atomic particles, atomic mass, isotopes, mass spectrometry, electron configuration (s/p/d/f), trends across periods and groups. HL adds quantum numbers, orbital diagrams, and detailed d-block chemistry.

Structure 2

Models of Bonding & Structure

Ionic bonding Covalent bonding VSEPR theory Metallic bonding Intermolecular forces HL: Hybridisation HL: MO theory

Lewis structures, VSEPR and molecular geometry, polarity, intermolecular forces (hydrogen bonding, van der Waals, dipole-dipole), metallic structures. HL adds hybridisation (sp, sp², sp³), resonance structures, and molecular orbital theory.

Structure 3 — HL content heavy

Classification of Matter

Functional groups Homologous series Spectroscopy HL: Stereoisomerism HL: NMR HL: Mass spectrometry

Organic functional groups, naming, spectroscopy for identification (IR, MS). HL adds stereoisomerism (optical and geometric), detailed NMR interpretation, and integration of analytical techniques. Spectroscopy is heavily tested in both Paper 1B and Paper 2.

Reactivity 1

What Drives Chemical Reactions?

Enthalpy Hess's Law Bond enthalpies Entropy Gibbs free energy HL: Born-Haber cycles HL: Lattice enthalpy

Exothermic/endothermic reactions, standard enthalpy changes, Hess's Law calculations, bond enthalpy calculations, entropy and spontaneity, Gibbs free energy. HL adds Born-Haber cycles, lattice enthalpy, and quantitative entropy calculations.

Reactivity 2

How Much, How Fast & How Far?

Stoichiometry & moles Rate of reaction Collision theory Equilibrium (Le Chatelier) Kc calculations HL: Rate laws HL: Activation energy

Stoichiometry calculations, mole concept, limiting reagents, rate of reaction factors, equilibrium constant expressions, Le Chatelier's principle, Kc and Kp calculations. HL adds rate laws, half-lives, reaction mechanisms, and Arrhenius equation calculations.

Reactivity 3 — Most HL marks here

What Are the Mechanisms of Chemical Change?

Acids & bases pH calculations Buffers Redox reactions Electrochemistry HL: Organic mechanisms HL: SN1 SN2 reactions

Brønsted-Lowry acids and bases, pH strong/weak acid/base calculations, buffer solutions, redox reactions, electrochemical cells (galvanic and electrolytic), Faraday calculations. HL adds organic reaction mechanisms in depth — nucleophilic substitution (SN1/SN2), electrophilic addition, elimination. Reactivity 3 is the most heavily tested area for HL students.

Assessment

How IB Chemistry is assessed

The 2023 revised syllabus changed the assessment structure. Our examiners coach every component.

Paper 1A — MCQ

20%

SL: 45 min · HL: 1h — Multiple choice questions

30 multiple choice questions (SL) / 40 questions (HL)
Tests breadth of knowledge across all syllabus strands
No calculator — conceptual understanding tested
Common traps: unit conversions, significant figures, sign errors

SL & HL

Paper 1B — Data-Based

20%

SL: 45 min · HL: 1h — Short answer with data

Questions based on provided data sets, graphs, spectra
Tests data interpretation, spectroscopy analysis
Students must draw conclusions from unfamiliar experimental data
Graph interpretation and error analysis skills essential

SL & HL

Paper 2 — Extended Response

SL 40% / HL 36%

SL: 1h15m · HL: 2h15m — Long answer questions

Multi-part extended response questions covering all strands
Calculations, mechanisms, evaluations, and predictions
Data booklet use essential — knowing which equations to apply
Final questions require synthesis and evaluation of multiple concepts

SL & HL

Internal Assessment (IA)

20%

SL & HL · ~10 pages · Individual investigation

Student designs and conducts an original chemistry experiment
Marked on: Exploration, Analysis, Evaluation, Communication
Research question must be focused and measurable
Error analysis and evaluation of methodology are heavily marked

SL & HL

Why Sev7n

Why Sev7n for IB Chemistry tutoring

Examiners who mark the actual papers

Our IB Chemistry tutors are active IB Examiners. They know exactly which topics generate the most marks, which command terms require what depth of answer, and how the data booklet should be navigated under exam conditions.

New 2023 syllabus fully covered

The revised Structure & Reactivity syllabus changed content organisation significantly. Sev7n tutors are fully trained on the new syllabus — not teaching from outdated materials.

IA experimental design coaching

Choosing a research question with a controlled independent variable and measurable outcome is critical. Our examiners have reviewed hundreds of Chemistry IAs and guide students away from the most common design flaws before they start collecting data.

Organic mechanisms — dedicated coaching

Organic mechanisms are consistently the most dropped marks in IB Chemistry HL. Our tutors run dedicated sessions on SN1, SN2, electrophilic addition, elimination, and condensation — with curly arrow notation drilled to exam standard.

Calculation accuracy under time pressure

Stoichiometry, Hess's Law, pH calculations, Kc/Kp, Faraday — all require accuracy and method clarity. Our tutors coach the exact working-out format that earns method marks even when the final answer is wrong.

Sessions recorded on Sev7n LMS

Every IB Chemistry session is automatically saved. Replay mechanisms, calculation walkthroughs, and data interpretation sessions before every exam — as many times as needed.

Student Stories

What IB Chemistry students say about Sev7n

★★★★★

"My daughter was completely lost in IB Chemistry HL organic mechanisms. After 6 sessions with her Sev7n tutor, she had a systematic approach to every reaction type. Her Paper 2 organic section went from near zero to almost full marks. Absolutely outstanding teaching."

★★★★★

"My IB Chemistry IA was a disaster — my research question was too vague and I had no control variables. My tutor helped me completely redesign the experiment. The final IA scored 19/24 — much better than I expected given where I started."

★★★★★

"Equilibrium and buffer calculations were my weakest area. My tutor broke down every calculation type with clear working-out methods. The examiner knowledge meant I learned exactly what method steps to show — not just the final answer. Grade went from 4 to 6."

★★★★★

"The data booklet coaching was something I hadn't expected to need. My Sev7n tutor showed me exactly which page to use for which calculation — and how to use it quickly under exam conditions. That one skill saved me significant time in Paper 2."

FAQs

IB Chemistry — frequently asked questions

What are the hardest topics in IB Chemistry? +

Most students find these topics hardest: electron configuration and periodicity (Structure 1), energetics including Hess's Law and Born-Haber cycles (Reactivity 1), acids, bases, and buffer calculations (Reactivity 3), organic reaction mechanisms — SN1, SN2, addition, elimination (Reactivity 3 HL), and electrochemistry calculations. Our examiner tutors target these specifically in every IB Chemistry programme.

How is the new 2023 IB Chemistry syllabus different? +

The 2023 revised IB Chemistry syllabus reorganises content from the old Topics 1-11 (SL) and 12-21 (HL) format into two strands: Structure (models of matter and bonding) and Reactivity (thermodynamics, kinetics, equilibrium, and mechanisms). The content is broadly similar but the organisation and some assessment approaches changed. All Sev7n tutors teach the new 2023 syllabus — and can also support students on the legacy syllabus where needed.

What is the IB Chemistry IA? +

The IB Chemistry IA is an individual scientific investigation (~10 pages) worth 20% of the final grade. Students design an experiment with a focused research question, collect and process data, and evaluate their methodology including sources of error. It is marked on: Exploration (research design), Analysis (data processing), Evaluation (quality assessment), and Communication (presentation). Our examiner tutors guide every stage from research question selection to final write-up.

Is IB Chemistry HL required for Medicine? +

Yes — IB Chemistry HL is required by the vast majority of medical schools globally. This includes UK universities (standard A-grade Chemistry HL), Indian medical colleges (strong Chemistry performance), NUS, and US pre-med programmes. Some universities accept SL for non-medical science programmes, but for Medicine, Pharmacy, and Chemical Engineering, HL is typically required. Always verify specific requirements with your target institutions.

IB Chemistry Tutoring by Active IB Examiners

Get IB Chemistry help from active IB Examiners

Book Free IB Chemistry Demo

What is IB Chemistry HL & SL?

Structure & Reactivity — all strands covered

How IB Chemistry is assessed

Why Sev7n for IB Chemistry tutoring

What IB Chemistry students say about Sev7n

IB Chemistry — frequently asked questions

Explore other IBDP subjects

Ready to score a 7 in IB Chemistry?