Determination of Ascorbic Acid in Vitamin C Tablets Done by: lora ID #: Date:12/3/2011 Objectives: The aim of this experiment is to determine the weight of ascorbic acid in three vitamin C tablets by titrating it directly with KBrO3‚ then back titration by Na2S2O3. Introduction: Vitamin C is a weak acid and a water soluble substance and it is often called ascorbic acid. It is useful for many biological activities and main functions such as: it is used to provide reducing equivalents for biochemical
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Between 200 C.E. and 900 C.E.‚ China underwent a lot of significant changes and continuities‚ especially in political and economical aspects. A specific change that happened to China’s economic system was the shift from agriculture in the Han Dynasty to trading in the Sui and Tang dynasties. Although there were changes in power and rule‚ China’s political administration continued to hold the same basic ideals‚ and was grounded in Confucian thought. During the late Han Dynasty‚ agriculture was the
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An adult hermaphrodite of C. elegans has the lesser amount of internal tissues and organs with unsegmented‚ bilaterally symmetrical‚ a cylinder-shaped body that is pointed at the ends. It has an outer covering (i.e.‚ body wall made up of cuticle‚ hypodermis‚ neurons‚ muscles and excretory and an inner tube contains the pharynx‚ intestine. An outer tube and an inner tube is partitioned by pseudocoelomic space and also the tissues controlled by an osmoregulatory system. In C.elegans head‚ the pharynx
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must be done. One main contrasting difference in the two stories is the reason expressed from the author for the murder. In “The Cask of Amontillado‚” Montresor explained in the beginning of the story that Fortunato had insulted him thousands of times before and that he has now finally taking his revenge. However in “The Tell-Tale Heart‚” the narrator does not seem to have a reason for revenge at all. The narrator‚ who isn’t named throughout the story‚ explains no reason why he must commit the murder
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University of Phoenix Material Appendix C Models of Abnormality Psychologists use several different models to explain abnormal behavior. These different models have created shifts in values and beliefs as well as improvements in clinical research. These differences in ideas mean that the different models are sometimes in conflict with one another. People who follow one model often point out where another model fails in its interpretations‚ investigations‚ and treatment methods. Read the brief
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demand and‚ on the other hand‚ it causes some significant losses both for the banking authority and traders. Electronic banking‚ on the other hand‚ solves the above problems. Furthermore‚ it opens up some other salient aspects such as increased foreign trade and foreign investment. 1.2 General problem statement Establishing Online banking infrastructure has been a challenging task for the developing countries like Bangladesh. At present‚ there is no infrastructure for performing Electronic-banking
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Section C (Edexcel IGCSE in English Language A) May 2010 Imagine that your school or college has been awarded a large sum of money to spend on improving facilities‚ and on increasing opportunities‚ for students. Write the text of a speech you might give to the Student Council‚ outlining your ideas on how the money should be spent. November 2009 “Schools are stuck in the past. They don’t adequately prepare young people for real life in the modern world.” Write about what you think schools
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global transformations began occurring. As Europeans came to economically dominate Atlantic trade‚ their influence over social customs expanded. As Europeans also benefited from the expansion of economic activities into the Americas‚ trade and conquest also brought about social changes. These changes were the cause of increasing economic dominance from the Europeans to the Atlantic world. Economic changes were among the most differences due to new contacts within the new Atlantic world. Particularly
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stated the new school board policy regarding the letter grade change. I understand that we would not be receiving the traditional letter grades‚ but instead either a “pass” or a “fail.” Personally‚ I believe that changing the old grading system of “A‚ B‚ C‚ D‚ and F” would be preposterous and completely horrendous. I am outraged at the fact that we would have just a “pass” and “fail” mark. I believe this because students with a “C” average will most likely be considered the same as a student
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audience‚ purpose and the link or relevance to the context (FLAP+C) You will also explain the relationship between your writing and the selected text‚ that is; how you have drawn on the text to inform your writing about the Context. You will use metalanguage to explain the decisions you have made about specific structures and features‚ and how language choices of authors you have studied have influenced these decisions. Understanding FLAP + C You can usually discuss your chosen form‚ purpose & audience
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