IB Chemistry builds its topics not as independent units but around two large axes: the structure of matter and how matter reacts. That choice affects the study method directly.
What the axis logic produces
Atomic structure, bonding and intermolecular forces sit on one side; kinetics, equilibrium, acid base and electrochemistry on the other. Questions usually connect the two axes: predicting behaviour from structure.
A student memorising topic by topic therefore cannot recognise the questions. Why a compound has a high boiling point is answered not by knowing the bond type but by moving from bond to behaviour.
How HL relates to SL
There is a common core and HL goes deeper into the same topics as well as adding further headings. It is not a separate subject.
HL is required by most universities for targets such as medicine and chemical engineering. That list of requirements is read before subjects are chosen.
The internal assessment
The student frames their own research question and carries out an experimental or data based investigation. It forms part of the final grade.
Where laboratory access is limited, a data based investigation is also accepted; in that case the originality of the research question becomes even more decisive.
The mathematics load
Stoichiometry, equilibrium constants, pH calculations and thermodynamic calculations appear. The calculations are not difficult but they demand discipline with units and significant figures.
The rubric often awards the method rather than the final number; leaving out intermediate steps is a frequent loss.
How to study
Settle the two axes first, then study topics by attaching them to those axes. Then work past exam questions and read extended answers against the rubric.
A data booklet is provided in the exam; what has to be learned is not the data but which piece of data to look up in which question.