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CHEMISTRY EXTENDED ESSAYThese subject guidelines should be read in conjunction with the IB extended essay general guidelines. Introduction An extended essay in chemistry provides a candidate with an opportunity
to investigate Choice of Topic It is important that the extended essay has a clear chemical emphasis and is not more closely related to another subject. Chemistry is the science that deals with the composition, characterization, and transformation of substances. A chemistry extended essay should therefore incorporate chemical principles and theory, and emphasize the essential nature of chemistry, relating to the study of matter and of the changes it undergoes. Although similar criteria apply to all extended essays in the experimental sciences, for an extended essay submitted in chemistry the topic chosen must allow an approach which distinctly involves chemistry. Where a topic might be approached from different viewpoints, the treatment of the material must be approached from a chemical perspective. An extended essay in an interdisciplinary area such as biochemistry will, if registered as a chemistry extended essay, be judged on its chemical content, not its biological content. The scope of the topic and the research associated with it should enable all the criteria, particularly the subject specific criteria, to be addressed. A good topic is one where the single research question is sharply focused and is susceptible to effective treatment within the word limit. Perhaps the most important factor is the depth of treatment that can be given to the topic by the candidate. Some topics may be unsuitable for investigation because of safety issues. For example, experiments involving toxic or dangerous chemicals, carcinogenic substances or radioactive materials should be avoided unless adequate safety apparatus and qualified supervision is available. Other topics may be unsuitable because the outcome is already well known and documented in standard text books and the candidate may not be able to show any personal input. An example might be a study of the reactions of the alkali metals with water as this is already covered by the syllabus. However some care does need to be exercised in deciding whether a topic is suitable or not; for example, a few years ago the study of the allotropes of carbon may have been thought to be trivial but this would not be the case today. The following examples of titles for chemistry extended essays are intended for guidance only. The pairings illustrate that focused topics (indicated by the first title) should be encouraged rather than broad topics (indicated by the second title).
Treatment of the Topic An extended essay in chemistry may be based on literature, theoretical models or experimental data. Whichever category is chosen the candidate should ensure that sufficient data will be available for evaluation and that the topic can be researched accurately using locally available resources. Candidates who choose to write an extended essay based on literature
and/or surveys should ensure that their extended essay clearly shows its
chemical basis. Essays written at the level of a newspaper or news magazine
article are unlikely to achieve a high mark. Since chemistry is an experimental
science, candidates are strongly encouraged to undertake experimental
work as part of their research, although this is not compulsory. Any It is possible to produce an extended essay in chemistry in which the candidate has used data collected elsewhere as the primary source. In such cases, the element of personal analysis and evaluation is important. In any chemistry extended essay candidates should be able to demonstrate
that they understand the theory underlying any experimental work and state
any assumptions made. They should show an understanding of the results
obtained and be able to interpret them with reference to the research
question posed. They should be critical of inadequate experimental design,
the limitations of the experimental method and any systematic errors.
Candidates should be encouraged to consider unresolved questions in their
research, and to suggest new Assessment Criteria
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Copyright: 2003 Isis Publication
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