Stoichiometry
What You Will Learn: Stoichiometry · Stoichiometric Calculations · Concentration and Dilution in Solution Stoichiometry
IB Chemistry topic guide
Reactivity 2: How Much, How Fast, How Far?
Reactivity 2: How Much, How Fast, How Far? is a core part of IB Chemistry. This guide connects the syllabus ideas behind Stoichiometry, Limiting Reagent and Yield, Rate of Reaction, Rate Laws and Mechanisms, How Far? The Extent of Chemical Change, shows how they appear in worked problems, and points you to the formulas and full lessons needed for exam revision.
What you will learn
Reactivity 2: How Much, How Fast, How Far? syllabus outline
The units below follow the structure used in the full Study to Learn course. Use the outline to identify exactly which idea needs attention, then work through the public example before continuing to the complete lesson path.
Limiting Reagent and Yield
What You Will Learn: Limiting Reagent and Yield · Identifying the Limiting Reagent · Percentage Yield and Atom Economy
Rate of Reaction
What You Will Learn: Rate of Reaction · Reaction Kinetics and Collision Theory · Measuring and Graphing Reaction Rates · Activation Energy and Catalysis in Detail
Rate Laws and Mechanisms
What You Will Learn: Rate Laws and Mechanisms · Rate Laws: Relating Rate to Concentration · Reaction Mechanisms and the Rate-Determining Step · Half-Life, Integrated Rate Laws and the Rate Constant (AHL)
How Far? The Extent of Chemical Change
What You Will Learn: How Far? The Extent of Chemical Change · Chemical Equilibrium · Calculating Kᴄ from Equilibrium Data · ICE Tables: From Initial to Equilibrium Concentrations
Free worked preview
What You Will Learn: Stoichiometry
This complete preview comes from the Stoichiometry unit. It introduces the core language, shows the method in context, and gives you a real example of the lesson quality before you create an account.
What You Will Learn: Stoichiometry
Section E asks how much, how fast, and how far reactions go — and this opening topic revisits the mole concept from A4 to answer the "how much" question systematically. The first lesson establishes the general method for stoichiometric calculations: converting a given quantity to moles, applying the mole ratio from a balanced equation, then converting back. The second lesson extends the same method to solution chemistry, where concentration and dilution calculations (n = cV) are used to work out reacting quantities — a skill you will use repeatedly through titrations in Section F.
What You'll Cover
- The general stoichiometric method: converting a given quantity to moles, applying the mole ratio from a balanced equation, and converting back.
- Concentration and dilution calculations in solution stoichiometry, and how to find reacting quantities using n = cV.
By the end of this topic you will be able to calculate any reacting quantity — mass, volume, concentration, or gas volume — from a balanced equation.
Reviewed by the Study to Learn editorial team · Updated 2026-08-04