Chemistry EEs need to emphasize the chemical aspects of the subject matter, incorporating chemical principles and theory, and emphasize the study of matter and of the changes it undergoes. (See the IB's Chemistry: Subject-specific guidance.)
The following is a comparison of Chemistry EE topics to demonstrate the focus and specificity your topic should have.
(Source: Chemistry: Subject-specific guidance, IB)
a. Experiment-based essay: The focus with experiment-based essays is the primary data produced as a result of the experiment(s) conducted by students. Secondary sources in the form of scientific publications should be used to support a line of argument or indicate where the student has adapted their approach so as to produce different results. A consideration of the quality of the secondary source should also be offered to identify limitations or weaknesses in approach, method and so forth. Note: there are restrictions placed on the use of animals and humans when it comes to experiment-based essays. Check the IB Policy ‘Guidelines for the use of animals in IB World Schools’.
b. Non-experiment-based essay: Non-experiment-based (literature) essays should effectively question the reliability of the secondary source material used, and offer some insight into the strengths and limitations of the methodological approaches taken by the secondary sources.
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Source: Lekanides, K. (2016). Extended Essay Course Companion. Oxford University Press.
