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Learn the difference between heterogeneous and homogeneous catalysis, how each works, and where they appear in IB Chemistry.

Learn what resonance is, why some molecules need multiple structures, and how resonance improves stability in IB Chemistry.

Learn what dehydrating agents are, how they work, and why they are essential in organic and inorganic reactions for IB Chemistry.

Learn what ligand exchange is, how ligands replace each other in transition metal complexes, and why this process changes color and stability.

Learn what the Beer–Lambert law is, how absorbance relates to concentration, and why it is essential in IB Chemistry quantitative analysis.

Learn what chelation is, how multidentate ligands bind metals, and why chelate complexes are more stable in IB Chemistry.

Learn what nuclear binding energy is, why it stabilizes the nucleus, and how it relates to mass defect in IB Chemistry.

Learn what standard enthalpy of formation means, how it’s defined, and how to use it in IB Chemistry calculations.

Learn what Hess’s law states, why it works, and how to use it to calculate enthalpy changes in IB Chemistry.

Learn what catalysts are, how they work, and why they lower activation energy in IB Chemistry reactions.

Learn the meaning of oxidation and reduction, how to identify redox reactions, and how to apply these concepts in IB Chemistry.

Learn what covalent bonds are, how they form, and why they matter in IB Chemistry. Perfect for fast, clear revision.

Learn what electronegativity means, why it varies across the periodic table, and how to use it confidently in IB Chemistry.

Learn why water has a bent molecular shape using VSEPR theory and how to explain it clearly for IB Chemistry exams.

Learn how increasing temperature changes gas volume using kinetic theory and gas laws, tailored for IB Chemistry success.

Learn what Hund’s Rule states, why electrons occupy orbitals singly first, and how to apply it in IB Chemistry.

Learn why water’s surface tension is unusually high and how hydrogen bonding explains this key IB Chemistry concept.

Learn what isotopes are, why they differ, and how IB Chemistry uses them in atomic structure and calculations.

Learn how atomic radius changes across periods and groups, why the trend occurs, and how to use it confidently in IB Chemistry exams.

Learn why the pH of a neutral solution is 7 at 25°C and how temperature affects neutrality in IB Chemistry.

Learn what exothermic reactions are, why they release heat, and how to explain them clearly in IB Chemistry exams.