essays it is perfectly reasonable to formulate the research question as a statement or as a hypothesis rather than an actual question. The essay must not exceed 4,000 words of narrative. Criterion I: formal presentation This criterion relates to the extent to which the essay conforms to academic standards about the way in which research papers should be presented. The outcome of the research should be a coherent and structured piece of writing that effectively addresses a particular issue or research question and arrives at a particular, and preferably personal, conclusion. Treatment of the topic, an extended essay in chemistry may be based on literature, theoretical models or experimental data. 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. The scope of the topic and the research associated with it should enable all the criteria to be addressed.
Since chemistry is an experimental science, students are strongly encouraged to undertake experimental work as part of their research, although this is not compulsory. Essays written at the level of a newspaper or news magazine article are unlikely to achieve a high mark. The way in which the investigation is undertaken will depend very much on whether or not the essay contains experimental work performed by the student.
Where possible, the quality of sources accessed or data generated should be verified by secondary sources or by direct calculations. Criterion B: introduction, the purpose of the introduction is to set the research question into context, that is, to relate the research question to existing knowledge in chemistry. It is usually appropriate to include also the underlying chemical theory required to understand how the research question has arisen. Intellectual initiative: Ways of demonstrating this in chemistry essays include the choice of topic and research question, and the use of novel or innovative approaches to address the research question.
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Originality and creativity: These will be apparent by clear evidence of a personal approach backed up by solid research and reasoning. Chemistry is the science that deals with the composition, characterization and transformation of substances. Note that all of the Extended Essays that have been uploaded have been graded as A papers. . In any chemistry extended essay, students should be able to demonstrate that they understand the theory underlying any experimental work and state any assumptions made. Perhaps the most important factor is the depth of treatment that can be given to the topic by the student. Students should indicate clearly whether they have personally designed the experiment, or give the source of an existing experiment method that they have used and state how they have adapted and improved upon. They should distinguish between primary sources (original scientific publications, personal communications, interviews) and secondary sources (textbooks, newspaper articles, reviews and show awareness of how reliable these sources are. Some research questions require some background knowledge that is not related to chemistryfor example, Do the fossils found in different strata of rocks at a particular location contain different amounts of sulfur? Beginning with HF Class of 2018 forward, we are using the 2018 Examination Session Guide for the Extended Essay. Textbooks should never be the only source of information. A good topic is one where the single research question is sharply focused and can be treated effectively within the word limit. 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.
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. The ratio of the gases evolved at the positive electrode during the electrolysis of common salt solution is better than Electrolysis of solutions. The school supervisor must be satisfied that the work described in the essay is genuine and essentially that of the student.
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