External assessment
Paper 2
This section looks at all aspects of Paper 2 which consists of several long questions broken down into smaller individual sub-questions which often make connections between different strands of the syllabus....
Experimental programme & IA
A new laboratory?
This page looks at how you can give input into the design for a new or refurbished chemistry laboratory. It covers national and local safety regulations and provides a suggested list for the chemicals...
Delivering the programme
Explaining the stability of carbocations
This page considers some recent research that makes answering one of the assessment statements in the 2023 syllabus somewhat problematical. The stabilising effect of alkyl groups on carbocations has been...
Delivering the programme
R3 What are the mechanisms of chemical change? Free
This final section of the Reactivity strand looks at how electrons rearrange in different ways during chemical reactions. The first part covers Brønsted-Lowry acids where a pair of electrons split heterolytically...
Delivering the programme
R2 How much, how fast, how far?
This topic has three separate strands. The first considers the amount of chemical change. This has already been covered to some extent in S1.4 (2) & R2.1 as concentration, the amount of chemical change,...
Delivering the programme
R1 What drives chemical reactions
There are several ways in which Chemistry can be defined but essentially when a chemical reaction occurs bonds are broken and new bonds are formed. Breaking bonds requires energy and energy is given out...
Delivering the programme
S2 Models of bonding & structure
This is the second of the three main topics under Structure. It covers the way that atoms bond together to form ions or molecules and the properties associated with the different types of the resulting...
Delivering the programme
S3 Classification of matter
Topic S3 covers the Classification of matter. It starts with the way in which the 118 elements are arranged in the periodic table and looks at the periodicity shown in both chemical and physical properties...
eBook
Ammonium nitrate & IB chemistry
Ammonium nitrate was very much in the news at the beginning of this decade after 2750 tonnes of the salt which were being stored in the port area of Beirut caused a massive explosion on 4 August 2020...
Delivering the programme
Example of connections
This example looks at how the reaction of methane with chlorine can be used to illustrate several different topics. A gallery of slides covering the concepts together with equations and relevant data...