This is Chemistry B, Salters, H433, taught through storylines. The other OCR specification is Chemistry A, H432, which is organised by topic in six modules.

They teach the same chemistry in a completely different order and the guides are not interchangeable. If your code is H432 you need the Chemistry A guide.

All of them, on all three. Salters is synoptic by design and the storylines are the teaching context for every paper, so nothing is examined once and finished with. The topic list is here.

Practical Skills in Chemistry, 1 hour 30 minutes and 60 marks, worth 22 per cent. It examines experimental method, technique and the analysis of data. The guide has 166 questions on practical skills for exactly this.

No. Component 04 is the endorsement, marked by your teacher across the twelve practical activity groups and reported as a pass or not classified alongside your grade. It is not examined.

The practical technique that is examined on the written papers is in the guide.

Yes. Mathematical Skills in Chemistry is its own topic at 121 questions, and the calculations also appear inside the storylines where they are taught: moles and titrations, enthalpy, equilibrium constants, pH, rates and electrode potentials.

About twenty minutes for one subtopic, all three steps. Storylines run from 235 to 376 questions, so work by subtopic and the size stops mattering.

Write. Chemistry mark schemes want a specific reagent and a specific condition rather than the gist, and step 2 is where that gets fixed. The method page sets out the evidence.

Yes. The method puts the chemistry into memory. Past papers train the unfamiliar context, which Salters leans on heavily, and the clock. OCR publishes them free.

A PDF of 3,430 exam-style questions covering the whole of OCR A-Level Chemistry B (Salters), with the answers printed after each storyline.

Find the specification code. OCR runs Chemistry A (H432) and Chemistry B Salters (H433). Salters teaches through storylines with names like Developing Fuels and The Ozone Story. If your child’s notes use those names, this is the right guide.

That is how Salters is designed. Each storyline introduces chemistry in a context and returns to it later in another, which makes it harder to know what has actually been retained. A question list per subtopic gives a straight answer to that.

There should be handwritten answers on paper and three passes over the same questions, and two scores per session to compare.

£8.00 for the whole specification. An endorsed Salters Chemistry textbook is usually £30 to £40.

219 subtopics at roughly twenty minutes each is about 73 hours for a full first pass, spread across two years.

Past papers, which OCR publishes free, a calculator, and their own notes for anything not yet taught.