IB Chemistry SL

You sit external papers set by the IB and complete an individual internal assessment. The external papers mix multiple-choice, short-answer, extended-response and data- or practical-based questions. The IB publishes the current component structure and duration; check its site and your school’s timetable because these details are session-specific.

The content is manageable, but the assessment demands precision. Marks are lost through vague explanations, weak calculation habits and inability to apply familiar ideas to unfamiliar data. Difficulty comes from breadth plus command terms such as “explain” and “evaluate”, not from unusually advanced mathematics.

Retakes are possible in later examination sessions, but the rules are set by the IB and administered through your school. Ask your DP coordinator whether your internal assessment score can be carried forward or must be repeated. Do not assume a retake is automatic or that your previous grade is preserved.

Work in steady weekly blocks rather than cramming. After each topic, write a one-page summary of models and definitions, then do calculation and explanation questions without notes. Reserve regular time for data analysis and practical write-ups. The IB publishes exam timing, not a recommended study schedule, so build one with your teacher.

Follow your school’s sequence first, because Structure and Reactivity ideas are deliberately interleaved. If studying independently, secure atomic structure, periodicity and bonding before quantitative chemistry, then mechanisms and organic reactivity. Revisit experimental skills throughout rather than treating them as a final topic.

No. Learn how to navigate it quickly and know which quantities and units you need. Practise using its equations in both directions, including rearrangements. Memorise only common definitions and relationships your teacher expects. The IB provides the data booklet in the examination, so navigation skill matters more than rote recall.

Typical losses include unit and significant-figure errors, confusing equilibrium with reaction rate, describing observations without explaining them, and drawing organic mechanisms with missing curly arrows or wrong charges. In the IA, a broad research question and weak uncertainty treatment cost heavily. Fix these with checklists and feedback.

You complete an individual scientific investigation, assessed by your teacher against IB criteria and moderated by the IB. A narrow research question, manageable variables, raw data with units and uncertainties, and a genuine evaluation matter more than an ambitious topic. Start early and keep a clear record of your methodology.

You need confident arithmetic, ratios, proportionality, graph interpretation, logarithms for pH and rates, and simple uncertainty treatment. Calculus is not required. The main risk is not difficult maths but careless unit conversion, premature rounding and failing to show working when a method mark is available.