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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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Browse all of our blog posts in the IB category here.
IB3 min read
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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7 functional-group traps in IB Chemistry Structure 3.2
Reading an ester as a ketone, an ether as an alcohol, missing a chiral centre: the naming and drawing errors that cost marks in Paper 1 and Paper 2.
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Why bonding models break down at the material boundary in IB
IB Chemistry Structure 2.4 walks from bonding models to bulk material properties. Learn the seven question families and marking logic that decide a 6 from a 7.
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IB Chemistry Structure 3.1
Groups are numbered 1, 2 and 13-18 in Data Booklet section 5, and the mark scheme keys on that: group 1 alkali, 17 halogens, 18 noble gases.
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