A good Chemistry study route has three parts: the syllabus that applies to you, an honest list of where your working breaks, and a plan of protected study blocks. This page takes you through each part, with a worked example of a route you can copy and adjust.
Chemistry is cumulative. A weak idea about particles or balancing returns as a mistake in calculations, rates and organic chemistry, so the order of the route matters as much as the hours.
Step 1: Which syllabus is the route built from?
The Cambridge IGCSE Chemistry code is 0620. Cambridge publishes each syllabus for a range of exam years, so write down your exam year before you plan anything.
Open the Cambridge Chemistry 0620 page, download the syllabus for your exam year and check two things: the topic list, and which content your route covers. Your school or exam centre decides your route and entry. The syllabus and exam-year navigator gives you a checking list, and the assessment guide explains who is responsible for what.
Step 2: Where does your working actually break?
Do not assume you know. Take one original question from each of the layers below and see where you stall.
- Particle layer. Can you describe what the particles do in a change of state or a reaction, without using only a trend word such as “faster”?
- Equation layer. Can you write and balance the equation without changing any subscript?
- Number layer. Can you turn a mass into moles, apply the ratio and convert back, with units on every line?
- Explanation layer. Can you link an observation to a model and then to a conclusion in complete sentences?
Mark each layer as secure, shaky or blocked. Your route should begin at the lowest blocked layer, because everything above it leans on it. The Chemistry original practice page gives mixed questions you can use for this check.
Step 3: What does a realistic route look like?
Here is an example. A student has 10 weeks before a mock exam and can protect 4 study blocks of 40 minutes each week.
- Total time: 10 weeks × 4 blocks × 40 minutes = 1,600 minutes, which is 26 hours 40 minutes.
- The course has 19 topic areas. At 2 blocks each (80 minutes per topic), the workload is 19 × 80 = 1,520 minutes.
- That leaves 80 minutes spare, which is only two 40-minute blocks across all 10 weeks. There is no room for a second pass.
The planner is honest here: this route fits only if every topic goes smoothly. A student who expects gaps should either protect more blocks, lower the depth on topics already secure, or start repairing earlier. The realistic revision planner reports a conflict instead of scheduling impossible hours, which is the behaviour you want.
A sensible order for the topic areas is:
- Particle models, atoms and isotopes and bonding and structure, because every later explanation uses particles.
- Formulas and equations and relative masses and amounts, because calculations depend on a correct equation and a clear idea of the mole.
- Concentration, gas and yield calculations, once the mole is secure.
- Electrolysis, energy changes, rates and equilibrium, which reuse particles and calculations.
- Acids, periodic patterns, metals and the environment, which are fact-heavy and link back to bonding.
- Organic chemistry, then separation, analysis and practical data, then extended explanation and error repair as a consolidation.
Keep the first block of each week for retrieval of last week’s work. New material comes in the second and third blocks, and the fourth is for repair of logged mistakes.
Why do study routes fail?
Routes usually fail for four reasons.
- The route follows the textbook, not the errors. A student revisits topics they already know, because they feel easy.
- Every block is new material. Nothing is retrieved, so earlier topics fade.
- Numbers are practised without the ratio step. Arithmetic improves but answers stay wrong. See the wrong mole ratio help page.
- There is no slack. One missed week cancels the whole plan.
Build one empty block into every week, and write down what you will drop first if time runs short.
When is a route not enough by itself?
A route tells you what to work on and when. It cannot hear your reasoning as you work.
If the same kind of mistake survives several rounds of honest practice, the gap is usually in a link between ideas rather than in a missing fact. In online one-to-one Chemistry tuition, a teacher can ask you to talk through a problem and notice where the thread breaks. Use the Chemistry learning guide for the full topic map, and the revision guide when your exam gets close.