Cambridge IAL · Analysis & Prediction

2023 Cambridge IAL Chemistry (9701) Past Paper Analysis

The May/June 2023 Cambridge International AS & A Level Chemistry (9701) examination series tested candidates across a broad spectrum of core competencies. These included Period 3 periodic trends, Group 2 thermal stabilities, transition metal ligand exchanges, Born-Haber cycle calculations, standard cell potential determinations, and complex multi-step organic synthesis pathways.

Updated: 12 Jun 2026

Analysis Sample paper

Difficulty 3.8/5

Total marks

270

Duration

465 mins

Most tested

Organic Synthesis and Stereochemical Mechanisms

Paper breakdown

Paper 12 (Multiple Choice): 40 marks · 75 minsPaper 22 (AS Level Structured Questions): 60 marks · 75 minsPaper 32 (Advanced Practical Skills 2): 40 marks · 120 minsPaper 42 (A Level Structured Questions): 100 marks · 120 minsPaper 52 (Planning, Analysis and Evaluation): 30 marks · 75 mins

Top chapters

The Periodic Table: chemical periodicity (Inorganic chemistry (AS Level)) · 35 marksOrganic synthesis (Organic synthesis) · 32 marksOrganic synthesis (Organic chemistry (A Level)) · 30 marksChemical energetics (Physical chemistry (AS Level)) · 28 marks

Examiner Analysis: May/June 2023 Chemistry (9701) Series

The May/June 2023 examination series for Cambridge International AS & A Level Chemistry (9701) presented a balanced yet highly rigorous set of papers spanning physical, inorganic, and organic chemistry. Spanning across Papers 12, 22, 32, 42, and 52, candidates were thoroughly tested on their conceptual understanding, experimental design, and quantitative accuracy.

Overall Difficulty Verdict

Our expert examiner panel rates this series as a 3.8 out of 5 stars in terms of overall difficulty. While Paper 12 and the introductory questions of Paper 22 provided accessible entry points, several hurdles in Papers 42 and 52 tested the limits of even top-tier students. Specifically, multi-step calculations in thermodynamics, precise curly-arrow mechanisms in organic synthesis, and sophisticated data analysis in Paper 52 pushed the boundary of typical core-level expectations.

Key Areas of Strength and Mark Accumulation

The standard 'high-yielding' areas where prepared students accumulated substantial marks include:

AS Periodic Table Trends: Periodic trends in electronegativity, ionisation energy, and maximum oxidation numbers for Period 3 chlorides were very well answered.
Transition Metals Definitions & Coloration: Basic definitions of complex ions and coordinating ligand species (like bidentate ligands) showed a strong recall rate.
Basic Organic Identification: Simple structural identification and naming of straight-chain carbonyl isomers remained highly accessible.

Common Pitfalls & Examiner Concerns

Examiner reports highlighted several persistent issues where students routinely dropped marks:

Curly Arrow Precision: In organic reaction mechanisms (such as electrophilic addition and substitution), arrows must originate exactly from a bond or a lone pair and point directly to the destination atom. Vague or reversed arrows were heavily penalised.
Early Rounding in Calculations: Rounding numbers at intermediate stages of Born-Haber cycle and titration calculations introduced severe rounding errors. Candidates are strongly advised to keep unrounded numbers on their calculators until the final step.
State Symbols: Missing state symbols in decomposition or precipitation equations remained a common oversight.
Graphing Anomaly Identification (Paper 52): Many candidates drew a line of best fit from the first to the last point, completely ignoring the anomalous first point, which compromised both the line and subsequent gradient calculations.

Preparation Strategies & Future Predictions

To excel in upcoming examinations, students should focus on mastering the transition from recall to application. Future papers are highly predicted to place greater focus on entropy changes, Gibbs free energy calculations, and multi-step nitrogen compound synthesis (such as diazo-coupling pathways). Practice drawing 3D stereoisomers for both organic molecules and octahedral transition metal complexes to ensure maximum points in structured papers.

Charts

Marks by chapter

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Question type mix

Compare the mark share of each paper section and question type.

Multiple Choice Questions40 marks · 40 questions
AS Level Structured Questions60 marks · 5 questions
Practical/Experimental Tasks40 marks · 3 questions
A Level Structured Questions100 marks · 9 questions
Planning, Analysis & Evaluation Questions30 marks · 2 questions

Mark accessibility

Estimate which marks were basic, mid-level, or high-difficulty.

78%within easy or medium reach

125

easy: 85 marksmedium: 125 markshard: 60 marks

Difficulty trend

Compare difficulty across recent years.

Command word frequency

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Skill weighting

Shows the skill mix this paper tested most heavily.

Study ROI

Bigger bubbles recur more often; higher bubbles carry more marks, helping you rank revision priorities.

Periodicity Trends (AS)

35 marks · Difficulty 2 · recurrence 95%

Organic Functional Groups & Naming

25 marks · Difficulty 2.2 · recurrence 90%

Standard Enthalpy Calculations

28 marks · Difficulty 3 · recurrence 85%

Standard Electrode Potentials & Nernst Equation

18 marks · Difficulty 3.2 · recurrence 80%

3D Stereoisomerism in Complex Ions

12 marks · Difficulty 4.5 · recurrence 75%

Time vs marks

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marksmins

Next-year prediction

Topics worth watching next year, with the reason shown directly below each bar.

Entropy and Gibbs Free Energy Changes90%

Highly recurrent core Physical Chemistry topic, tested lightly in this series but highly likely to feature as a major calculation-based structured question in the upcoming sets.

Nitrogen Compounds (Phenylamine and Diazo dye synthesis)85%

Only brief mentions in the current paper; future sessions are highly anticipated to feature full multi-step synthesis pathways involving benzene to phenylamine to azo-coupling.

Group 17 Halogen Trends and Hydrogen Halides80%

This set focused heavily on Period 3 chlorides and Group 2 thermal stabilities, leaving Group 17 halide displacement and redox chemistry under-tested.

Topic-year heatmap

Compare topic weight by year to spot recurring and returning areas.

Jun 2023 (V1)

Jun 2023 (V2)

Chemistry of transition elements

Nitrogen compounds (Organic chemistry (A Level))

Organic synthesis (Organic chemistry (A Level))

Chemical energetics (Physical chemistry (A Level))

Simple rate equations, orders of reaction and rate constants (Reaction kinetics)

Atomic structure (Physical chemistry (AS Level))

Periodicity of physical properties of the elements in Period 3 (The Periodic Table: chemical periodicity)

Chemical energetics (Physical chemistry (AS Level))

Amino acids (Nitrogen compounds)

Esters (Carboxylic acids and derivatives)

Examiner insights

Official report

Common pitfalls

Omitting state symbols in chemical equations and ionic equations, particularly in thermal decomposition and precipitation reactions.
Incorrect drawing of organic mechanism curly arrows—arrows must start precisely on a lone pair of electrons or a covalent bond and point directly to the accepting atom or bond.
Early or premature rounding in multi-step chemical energetics calculations (e.g., Born-Haber cycle, mass-to-mole conversions), leading to significant final errors.
Failing to account for stoichiometry ratios when calculating the relative formula mass of basic carbonates from decomposition residue weights.

Misconceptions

Believing that the shielding effect of inner shells remains constant across a period when discussing electronegativity or ionisation energy trends.
Confusing structural isomerism with stereoisomerism (optical or cis-trans) when identifying unsaturated carbon backbones.
Assuming that a catalyst simply increases the total number of collisions, rather than providing an alternative pathway with a lower activation energy to increase the frequency of successful collisions.
Treating the pH of neutral pure water at non-standard temperatures (such as 35°C) as exactly 7.00, rather than calculating it using Kw.

Where marks are lost

Losing marks on Paper 52 graph work by drawing a straight line of best fit that blindly connects the first and last points, thereby failing to identify and exclude obvious anomalies.
Omitting the necessary square brackets in the pH expression '-log[H+]' when writing definitions or explaining weak acid dissociation.
Failing to convert standard Gibbs free energy and enthalpy values from Joules (J) to kilojoules (kJ), or vice versa, during thermodynamic equations.
Incorrect naming of esters by reversing the alcohol-derived and carboxylic acid-derived chains (e.g., confusing ethyl propanoate with propyl ethanoate).

Estimated grade cut-off

Updated: 12 Jun 2026

Source: Cambridge International grade thresholds (official)

Level	Mark	Percentage
A*	197/260	76%
A	161/260	62%
B	125/260	48%
C	102/260	39%
D	79/260	30%
E	56/260	22%

Official grade boundaries published by Cambridge International grade thresholds (official).

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