Blog
The subject report and errors in the exam papers Free
This blog stresses the importance of the chemistry subject reports. It focuses particularly on the recommendations and guidance for teaching future students and why this is also important to those setting,...
Assessment
Essential Facts
This section looks at the essential facts about the assessment process. This first page covers the format of the papers and the component weightings. Linked pages cover the assessment objectives and command...
External assessment
Essential Facts
This section looks at the essential facts about the assessment process. This page covers the format of the papers and the component weightings. Linked pages cover the assessment objectives and command...
DP Core
The 12 TOK concepts
This page focuses on the "concept-based nature of TOK and how the twelve concepts underpinning this are transdisciplinary in nature and in particular how they are relevant to the understanding of chemistry....
DP Core
Aims
This page looks at the four listed aims in the EE guide (First Assessment 2027) and then considers other aims that can also be achieved through the Extended Essay. These include improving your students'...
External assessment
Chief Examiner's subject report
A few months after each examination session has ended the chemistry subject report, compiled by the Chief Examiner, is published on My IB. This page explains how the report is constructed and why it is...
External assessment
Understanding hybridization
The theory of hybridization is developed by first considering how atomic orbitals combine to form molecular orbitals which then leads on to how hybrid orbitals are formed. The relationships between shapes,...
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External assessment
Understanding and using ΔG
Confusion often arises as to exactly what ΔG represents, particularly the difference between ΔGand ΔG⦵. This page covers the three relationships that use ΔG⦵ in the IB and the three main problems encountered...
External assessment
Misuse of formulas
Students often use mathematical formulas to solve chemical problems in exams and sometimes arrive at the wrong answer. This page looks at why this is so and encourages students to work always from first...
External assessment
IE graph(s)
Students often seem to have problems explaining the shape of ionization energy graphs correctly. This page outlines the common mistakes they make and details how to overcome them Explaining the shapes...