Eduqas A-level Chemistry (A410QS): papers, data booklet and grade boundaries

Eduqas A-level Chemistry at a glance

WJEC Eduqas is the exam board that offers WJEC qualifications in England. Its A-level Chemistry (entry code A410QS) is regulated by Ofqual, taught from 2015 and first awarded in 2017. It is linear: all papers are sat at the end of the course, in the May and June series.

That is 300 marks. Components 1 and 2 each have Section A, 15 marks of short answer questions, and Section B, 105 marks of structured and extended answer questions set in theoretical, practical and other contexts.

What each component covers

Eduqas arranges the content into Core Ideas, Principles and Concepts, then Physical and Inorganic Chemistry, then Organic Chemistry and Analysis. The core topics can be assessed in every paper.

• Core Ideas (C1 to C3): the language of chemistry and structure of matter (formulae, atoms, calculations, bonding, solid structures, the periodic table), chemical change, and the chemistry of carbon compounds.
• Physical and Inorganic (PI1 to PI5): electrochemistry, more complex patterns of the periodic table, chemical kinetics, energy changes and equilibria. This is Component 1.
• Organic and Analysis (OA1 to OA4): higher concepts in organic chemistry, organic compounds containing oxygen, organic compounds containing nitrogen, and organic synthesis and analysis. This is Component 2.

Component 3 is a 1 hour 15 minute paper of structured and extended answer questions with an emphasis on practical contexts and applications. It draws on the Core Ideas, Physical and Inorganic and Organic and Analysis content, so planning, data and error questions come up from all three areas.

Data booklet, practical work and calculators

WJEC publishes a GCE AS/A Level Chemistry data booklet for the specification. It lists constants such as the molar gas constant R = 8.31 J mol⁻¹ K⁻¹, molar gas volumes at 273 K and 298 K, the specific heat capacity of water, the ionic product of water and the Avogadro constant, along with unit prefixes. Practise with it from the start of the course so that you know what you will not have to memorise.

The practical endorsement is a non-exam assessment of practical competency. It is reported separately and does not contribute to the final grade. The specification’s maths appendix includes using a calculator for logarithmic functions in simple pH calculations, so be fluent with your calculator’s log and antilog keys.

Worked examples in Eduqas style

Equilibria: finding Kc

For N₂O₄(g) ⇌ 2NO₂(g), the equilibrium concentrations are [N₂O₄] = 0.040 mol dm⁻³ and [NO₂] = 0.12 mol dm⁻³.

The units come from the expression: mol² dm⁻⁶ divided by mol dm⁻³ leaves mol dm⁻³. Powers in the Kc expression come from the balancing numbers.

Acids and bases: pH of a strong base

Find the pH of 0.020 mol dm⁻³ sodium hydroxide, using Kw = 1.00 × 10⁻¹⁴ mol² dm⁻⁶.

NaOH is a strong base, so [OH⁻] equals the concentration of the base. Give pH to 2 decimal places. Practise reaction rates and energy ideas in our course:

Electrochemistry: cell potential

For a cell made from Zn²⁺|Zn (E° = −0.76 V) and Cu²⁺|Cu (E° = +0.34 V), the more positive half-cell is the positive electrode:

Do not multiply an electrode potential by the number of electrons: E° is not changed by the stoichiometry. A positive cell potential shows the reaction is feasible under standard conditions.

How Eduqas differs from OCR

Both boards offer a linear A-level in chemistry with a separate practical endorsement. Eduqas has two 2 hour 30 minute papers and a shorter practical-focused paper of 1 hour 15 minutes, while OCR Chemistry A has two 2 hour 15 minute papers and a 1 hour 30 minute unified paper. The papers split the content differently, so use past papers from your own board. The OCR A-level Chemistry guide covers the other course.

Grades and June 2026 grade boundaries

Eduqas adds your component marks into a total out of 300 and compares it with the qualification boundaries. Component boundaries are notional and are a guide for analysis, not official grades. This table is from Eduqas’ GCE A Level Grade Points document for June 2026. Eduqas says it releases boundaries on results day after awarding.

Worked through: 70, 75 and 40 give 185 out of 300, which is above the grade B boundary of 164 and 8 marks short of an A (193).

Using the daily paper as a short timed mock

Uni-Sine publishes a free daily paper on each A-level chemistry track, with a new one every day. It is a short timed paper of 8 questions worth 25 to 35 marks, marked instantly with worked answers. It is not an Eduqas paper and it is much shorter than a 2 hour 30 minute paper, so use it for quick regular practice alongside full Eduqas past papers.

• Chemistry Advanced 1 covers amount of substance, enthalpy changes, alcohols, equilibria, redox, electron configuration, bonding, kinetics and the Maxwell-Boltzmann distribution, alkanes and alkenes and periodicity, which supports the Core Ideas and Component 1.
• Chemistry Advanced 2 covers acids and buffers, NMR and spectroscopy, amines and polymers, transition metals, Born-Haber cycles and entropy, electrode potentials, rate equations, Kp, aromatics, carbonyls and synthesis, which supports Components 1 and 2.
• It does not rehearse the practical-based style of Component 3, so use Eduqas past papers for that. See our A-level mocks guide and the A-level Chemistry guide for more.

Exam answers

Uni-Sine does not publish official answers or mark schemes for Eduqas A-level Chemistry papers. The answers and a worked mark scheme for each question come with today’s paper once you have submitted it and it has been marked, so you can see where every mark was won or lost.

Common mistakes in Eduqas A-level Chemistry

• Missing units on equilibrium constants and rate constants.
• Rounding too early in multi-step calculations.
• Forgetting that Core Ideas can appear in every paper. Do not drop early topics after Year 12.
• Treating Component 3 as an afterthought. It is 20% of the A-level and rewards planning, data handling and evaluation.
• Writing mechanisms with the wrong arrows. A curly arrow shows the movement of an electron pair.

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