This complete bundle contains all six Pearson Edexcel IAL Chemistry Master Revision Guides for Units 1–6 (WCH11–WCH16). Covering the entire IAS and IA2 specification, this resource is aligned with the 2019–2025 exam series and based on Principal Examiner Reports (2019–2024) – helping students move from grade U to A*.

What’s inside?

Unit 1 – Mole calculations (n = m/Mr, n = cV, pV = nRT), electronic configurations, ionisation energy trends, mass spectrometry, VSEPR shapes (all 9), dot-and-cross, free radical substitution, electrophilic addition (Markovnikov), IUPAC naming, E/Z isomerism, CP1.

Unit 2 – Calorimetry (q = mcΔT, ΔH in kJ mol⁻¹), Hess’s Law, bond enthalpy, hydrogen bonding, oxidation numbers, titration, Group 2/7 chemistry, halogen displacement, disproportionation, halide tests (AgNO₃), Maxwell-Boltzmann, Le Chatelier, nucleophilic substitution (OH⁻, NH₃), alcohol oxidation, IR spectroscopy, CP2–CP8.

Unit 3 – Practical Skills I: 8 core practicals (CP1–CP8), variables (IV, DV, CV), graph skills (gradient, tangent), uncertainty (absolute, percentage, combining), SECIA evaluation framework, chemical tests (ions, gases, functional groups), titration, calorimetry, reflux vs distillation, CP1–CP8.

Unit 4 – Rate equations (orders, k units), Arrhenius (ln k vs 1/T, Ea = –gradient × R), entropy (ΔStotal = ΔSsystem – ΔH/T), Born-Haber cycles (lattice energy), Kc/Kp (ICE tables, units), pH calculations (strong acid, weak acid [H⁺]=√(Ka×[HA]), buffer via Henderson-Hasselbalch), titration curves, HCN addition (racemic mixture), ¹H NMR (splitting n+1, integration), acyl chlorides, ester hydrolysis, polyesters, CP9–CP11.

Unit 5 – E°cell (E°cell = E°cathode – E°anode), cell diagram notation, redox titrations (MnO₄⁻/Fe²⁺ 1:5; I₂/S₂O₃²⁻ 1:2), fuel cells, TM electronic configurations (4s lost first), all 8 TM ions with NaOH/NH₃ (observations, equations), ligand exchange ([Cu(NH₃)₄(H₂O)₂]²⁺ deep blue), vanadium oxidation states (+5→+4→+3→+2), EAS mechanisms (nitration, halogenation, Friedel-Crafts), amine basicity (aliphatic > NH₃ > aromatic), azo dye synthesis (diazotisation below 10°C, coupling with phenol), amino acids (zwitterion, peptide bond), Grignard reagents, CP12–CP16.

Unit 6 – Practical Skills II: 8 core practicals (CP9–CP16), Arrhenius plot (Ea = –gradient × R), Ka from pH ([H⁺]=10⁻pH, assumption check), redox titration techniques (starch at straw stage, permanent pink endpoint), E°cell calculation, aspirin synthesis (recrystallisation, % yield, FeCl₃ purity test), chemical tests complete reference (ions, gases, organic groups), SECIA evaluation framework.

Key features across all units:

Priority heatmaps – Critical topics (★★★★★) appear in every sitting. Revise these first.

Top 10–15 examiner errors per unit – Direct from examiner reports: missing working, wrong units (kPa→Pa, cm³→dm³, °C→K), incomplete ionic equations, VSEPR missing lone pairs, Hess’s Law sign errors, titration using cm³ not dm³, weak acid [H⁺] missing square root, Born-Haber sign errors, E°cell subtraction wrong, 4s electrons lost first, diazotisation temperature omitted, Arrhenius using °C not K, starch added too early in I₂/S₂O₃²⁻ titration.

Core practicals (CP1–CP16) – Method, key measurements, dominant errors, improvements.

Mathematical skills modules – Mole calculations, ideal gas equation, Hess’s Law, bond enthalpy, calorimetry, titration, percentage uncertainty, rate equations, Arrhenius, entropy, Born-Haber, Kc/Kp, pH all four types, Henderson-Hasselbalch, redox titration mole ratios, E°cell, Ea from gradient, Ka from pH, and % yield.

Model answers – 1-mark to 6-mark extended writing with examiner commentary (RAM definition, IE trends, free radical substitution, nucleophilic substitution, calorimetry evaluation, buffer explanation, Born-Haber, E°cell, azo dye synthesis).

Exam predictions – High-confidence predictions for every unit (multi-step mole calculation, electronic configuration + IE trends, dot-and-cross + VSEPR, electrophilic addition, IUPAC naming, Hess’s Law, NS mechanism, titration + uncertainty, Le Chatelier, pH calculation, Born-Haber, rate equation, entropy, NMR, E°cell, TM reactions, EAS, azo dyes, Grignard).

Teacher planning tools – Diagnostic activities, student weakness profiles (The Calculator, Memoriser, Theorist, Avoider, Unit Converter; The Square-Root Forgetter, Born-Haber Sign Flipper, Henderson Hesitator; The Kelvin Forgetter, Mole Ratio Confuser, Starch Mis-timer), common misconceptions registers, differentiated revision (three tiers), and classroom starters/exit tickets.

How I use this bundle:

For students – Unit 1: show calculation working (formula → substitution → answer + units). Unit 2: calorimetry ΔH negative if temperature rises; NS mechanism arrows from lone pair (OH⁻) or bond (C–Br). Unit 3: gradient = Δy/Δx with units; % uncertainty = (absolute/measured)×100. Unit 4: weak acid [H⁺] = √(Ka×[HA]), buffer pH = pKa + log([A⁻]/[HA]), Kc units = (mol dm⁻³)^Δn. Unit 5: E°cell = more positive – less positive, 4s electrons lost first, diazotisation below 10°C. Unit 6: T in K for Arrhenius, MnO₄⁻/Fe²⁺ = 1:5, starch added at straw stage.

For teachers – Use diagnostic activities to assign weakness profiles. The misconceptions register targets persistent errors across all examiner reports.

This bundle includes: Unit 1 (WCH11), Unit 2 (WCH12), Unit 3 (WCH13 – Practical Skills I), Unit 4 (WCH14), Unit 5 (WCH15), and Unit 6 (WCH16 – Practical Skills II).

Independently produced by Samata Reviews. Not affiliated with or endorsed by Pearson Education Limited or Edexcel.

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