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A good topic is one where the single research question is sharply focused and can be treated effectively within the word limit.Perhaps the most important factor is the depth of treatment that can be given to the topic by the student. The effects of sugar-free chewing gum on the p H of saliva in the mouth after a meal is better than Acidbase chemistry.
Broad or complex survey topics (for example, investigations into health problems caused by water pollution, chemotherapy for cancer treatment or the use of spectroscopy in chemical analysis) will not permit the student to discuss conflicting ideas and theories, nor to produce an in-depth personal analysis within the word limit.
Some topics may be unsuitable for investigation because of safety issues.
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, previously, the study of the allotropes of carbon might have been thought to be trivial but this would not be the case today.
For example, experiments involving toxic or dangerous chemicals, carcinogenic substances or radioactive materials should be avoided unless adequate safety apparatus and qualified supervision are available.
Other topics may be unsuitable because the outcome is already well known and documented in standard textbooks, and the student may not be able to show any personal input.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, students are strongly encouraged to undertake experimental work as part of their research, although this is not compulsory.Extended essay in chemistry The following is an overview of the extended essay guidelines for chemistry (IBO documents) An extended essay in chemistry provides students with an opportunity to investigate a particular aspect of the materials of our environment.Such extended essays must be characterized by a particular chemical emphasis within a more general set of research criteria. is better than Extraction of natural products from plants.Moreover, it may help if the student further defines and refines the topic chosen for study in the form of a research question or statement.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.Title Analysis of strawberry jellies by paper chromatography Research question The use of paper chromatography to determine whether strawberry jellies obtained from 24 different countries in 5 different continents all contain the same red dyes.Treatment of the topic An extended essay in chemistry may be based on literature, theoretical models or experimental data.