Selectividad is not an intelligence test, it is a test of endurance and strategy. In Chemistry the syllabus is dense, and a sign error or a weak justification costs you the tenths of a point that weigh heavily for Medicine or Engineering. If you want to compete for the top grades, you need to stop studying like a high school student and start training.
Key takeaways
- Understanding the solution is not knowing how to produce it: that is the illusion of competence.
- In EBAU Chemistry, the justification scores more than the final number.
- Mixing blocks within one session trains what the exam actually asks for.
- A mistake journal is worth more than another round of repeated exercises.
The illusion of competence: why you think you know Chemistry
Many students spend hours reading the theory of redox reactions or thermochemistry. They believe they understand it because, when they read the solution, it seems logical. That is called the illusion of competence: your brain recognizes the information but cannot produce it from scratch.
Memory in Chemistry is like a muscle; if you do not lift the weight yourself (solving the problem without looking), the muscle does not grow. And forgetting is especially fast here because the concepts are abstract and chained together: if you do not review atomic structure today, tomorrow you will not understand why a covalent bond behaves the way it does.
For Chemistry content to consolidate, it has to go through active recall: forcing your mind to find the answer before seeing the solution.
Strategies of the top-scoring students
Mastering the theoretical narrative
In recent years EBAU graders value the justification more than the numerical result. A well-argued development with the wrong number saves more points than the right number with no explanation.
- Tip: do not memorize definitions, memorize keywords. For the periodic table yours should be effective nuclear charge, shielding, and distance to the nucleus. If all three show up in your justification, you have a strong shot at the point.
Interleaving: ordered chaos
Do not do 20 acid-base exercises in a row. On exam day the problems come mixed, and you freeze not because you do not know the formula but because you do not know which one applies.
- Strategy: in a 2-hour session, do one exercise from each block: stoichiometry, bonding, thermochemistry, and organic. This trains cognitive flexibility, which is exactly what the exam evaluates.
The logged error method
Students who score highly keep a mistake journal. Every time you fail at balancing an equation or an equilibrium constant, write it down. That mistake is your most valuable asset, because it tells you exactly which connection is weak.
How technology transforms your preparation
Chemistry has a tedious, unavoidable side: nomenclature, constants, and series you need on autopilot. This is where technology stops being an accessory. Selectiva App is not a database of notes, it is a training system that applies the science of learning for you:
- From notes to quizzes in seconds: upload your notes on galvanic cells and the AI generates a test on that exact content. No more passive studying.
- Flashcards with spaced repetition: the metal activity series comes back right before it fades.
- Concept maps for the big picture: organic chemistry is a road map; visualizing how you go from an alkane to an alcohol and from there to an acid turns a dense block into something you can walk through.
Your roadmap (4-week plan)
| Phase | Main focus | Key tool |
|---|---|---|
| Week 1: foundations | Atomic structure, periodic table, and bonding | Concept flashcards |
| Week 2: energy | Thermochemistry and kinetics: the why behind reactions | Concept maps |
| Week 3: the big block | Chemical equilibrium and acid-base | Intensive quizzes |
| Week 4: wrap-up and redox | Electron transfer and organic chemistry | Practical cases |
The first three weeks build; the fourth closes and mixes. If you are not doing full timed exams in the last week, you are missing the dress rehearsal.
Less cramming, more system
Cramming is the Chemistry student's worst enemy. The content is so technical that if you force it in the night before, it blurs together in your head, and that is exactly what causes you to blank out.
The key for EBAU 2026 is intelligent consistency. You do not need to study 8 hours a day: you need to study one hour with an active recall strategy and lean on tools that automate the review. When the system is good, the result stops depending on how inspired you feel that day.
Conclusion: prepare for the exam you will actually get
In the end you have two options: fight the notes alone, or build a system that works for you. The EBAU does not reward whoever suffers most, but whoever organizes best.
While others decide what to review or highlight endless paragraphs, you can be beating the forgetting curve, turning your notes into quizzes, and seeing dense topics as navigable outlines.
A 10 in Chemistry is not luck, it is a method.
Frequently asked questions
How much Chemistry study does the EBAU need?
Distribution matters more than raw hours: one hour a day with active recall over the final weeks pays off far more than marathon days right before the exam.
Which Chemistry block appears most in the EBAU?
Chemical equilibrium and acid-base usually carry the most weight, followed by redox. Always check the official weighting for your region, as it varies.
Is it better to do past papers or study theory?
Both, in this order: theory until you can explain it without looking, and from there full timed exams, which is where you find the real gaps.
How do I avoid blanking out on exam day?
By practising with mixed problems instead of block by block, and by doing timed mock exams. Freezing usually comes from never having trained to identify which type of problem you are facing.
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