StudyVector is an early-stage exam platform. These pages are written to help students revise better, then move into useful practice without pretending official specifications or past papers do not still matter.
Use this guide to revise the equation skills behind common GCSE Chemistry mark leaks, then move into targeted practice.
Supported boards
Cross-check official specifications and past papers with AQA, Pearson Edexcel and OCR. StudyVector is independent and not exam-board affiliated.
GCSE Chemistry equation revision is different from reading a formula list. Students need to balance symbol equations, understand state symbols where required, use reacting ratios, control units and connect equations to practical data. This page organises the highest-friction equation skills so revision can become more precise than 'do more Chemistry'.
Start light first
Start with low-focus cards, drill by topic, or see summer 2026 predicted angles — then set your course and exam board when you want the full loop.
Start low-focus cards · Exam questions by topic · Predicted topics 2026 · All subjects
Guide context
Students want a formula or equation sheet page that also teaches when and how to apply the formula under exam conditions.
Revision method
Check that atoms balance on both sides, that the equation matches the reaction described, and that any calculation uses the correct substance and units.
For calculation questions, write the relationship before substituting values. A clear method makes it easier to spot whether the mistake is Chemistry knowledge, maths handling or unit conversion.
A missed Chemistry equation is rarely random. It usually repeats: balancing, mole ratio, concentration setup, rate graph interpretation or percentage calculation.
StudyVector's Error Log is built for that pattern. Save the mistake, label the reason, and retry a narrow set before returning to mixed Chemistry practice.
Topic list
These topic routes are where equation mistakes usually reveal a deeper weak spot.
Example questions
Balancing equations
Count each type of atom on both sides again. Do not change formula subscripts to make balancing work.
Moles
It gives the reacting ratio, so using the wrong coefficient changes the whole calculation.
Rates
Name the change being measured, the time interval and the units before calculating a rate.
A formula sheet only becomes useful when it shows the decision-making around rearranging, units, and choosing the correct rule.
Each formula page points students back into the topic strands where those equations or identities keep appearing.
Short example questions help students check whether they can actually use the formula rather than merely recognise it.
The advice focuses on recognition cues, common slips, and how high-performing students rehearse equations before a paper.
Pick your route
Subject cards show board support and coverage upfront, so you can decide faster instead of clicking through blind.
Practise balancing first, then use topic-based calculation sets for moles, concentration, reacting masses, rates and yield.
Check your exam board and teacher guidance for what is expected. StudyVector focuses on applying and balancing equations rather than replacing official requirements.
The mistake may be maths handling, balancing, units or choosing the wrong reacting ratio, not the core concept itself.
Questions follow AQA, Edexcel, OCR, WJEC, Eduqas, CCEA, Cambridge International (CIE), Pearson Edexcel International, OxfordAQA International, SQA, IB, AP spec wording — not generic AI answers. Start light, then save progress when you want the full loop.