IB3 min read
How to balance a half-equation in acid for IB Chemistry
IB Chemistry Reactivity 3.2 electron transfer reactions: how examiners mark oxidation numbers, half-equations, and redox titrations on Papers 1 and 2.
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IB guides, IA / EE notes and exam strategies
From Internal Assessment and Extended Essay examples to HL/SL course guides, we share content here that makes the IB Diploma Programme journey easier.
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IB3 min read
How to score a 7 on IB Chemistry Reactivity 3.1 weak-acid
IB Chemistry Reactivity 3.1 proton transfer reactions: Brønsted–Lowry, Lewis, Ka, pH curves, and the conjugate-pair writing that decides a 6 from a 7.
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IB Chemistry Reactivity 2.3: why 'how far' is a number, not a feeling
IB Chemistry Reactivity 2.3 explained: Kc, Kp, Le Chatelier, ICE tables and the Paper 1/Paper 2 split that decides a 5 from a 7 in the IB Diploma.
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IB Chemistry Reactivity 2.2
IB Chemistry Reactivity 2.2 breaks down the rate of reaction into collision theory, the rate expression, and Arrhenius behaviour.
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Why a 7 in IB Chemistry Reactivity 1.4 depends on conditions
IB Chemistry Reactivity 1.4 entropy and spontaneity: Gibbs-energy traps, sign conventions, and Paper 1 / Paper 2 question types that decide a 6 from a 7.
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5 mole–stoichiometry traps in IB Chemistry Reactivity 2.1
IB Chemistry Reactivity 2.1 – How much? Stoichiometry mastery for Paper 1 and Paper 2, with worked mole ratio, limiting reagent, and gas volume methods.
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How to draw an enthalpy-level diagram for IB Chemistry Reactivity 1.2
IB Chemistry Reactivity 1.2 energy cycles explained: Hess's law, enthalpy of formation, and bond enthalpies, with the Paper 2 marking patterns that decide a 5 from a 7.
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Why IB Chemistry Reactivity 1.3 demands a sign convention early
IB Chemistry Reactivity 1.3 unpacked: bond enthalpies, Hess cycles, mean versus actual values, and the sign conventions that separate a level 6 from a 7 on Paper 1 and Paper 2.
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Why IB Chemistry HL candidates lose most marks on Hess cycles
IB Chemistry Reactivity 1.1 enthalpy changes: the calorimetry, Hess cycle, and bond-energy question families that decide a 5 from a 7 on Paper 2, with rubric-aware tactics.
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