Toolkits
Deep dives on the ideas that show up everywhere. Each one starts with why the idea exists at all — the problem it was invented to solve, what it actually does, and where it turns up outside a classroom — and then goes through it properly: the full explanation, the table you actually need, worked examples, and the mistakes that cost marks.
Every unit
Chemistry 20 you still need
Moles, molar mass, concentration, dilution and mole ratios — the arithmetic underneath every calculation in this course, with the places marks go missing.
Open the toolkit
Electrochemistry
Balancing redox equations
The half-reaction method as a fixed procedure, worked in acidic solution, converted to basic, and applied when the half-reaction is not in the data booklet.
Open the toolkit
The exam itself
Using the data booklet
Which table answers which question, how to read reduction potentials and the acid table in the right direction, and the decisions the booklet will never make for you.
Open the toolkit
How to use these
- Wondering why any of this is a thing? Read the opening section. It is the part a textbook usually skips.
- Stuck on a question type? Open the toolkit for that idea and find the worked example closest to it.
- Revising? Read the tables and try the checks, then go to practice questions to see whether it stuck.
- Writing the diploma? The toolkits cover what the formula sheet and data pages do not give you — see diploma prep.