TECH0701: Measuring the Melting Points of Compounds and Mixtures Introduction This exercise dealt with the melting points of pure mandelic acid and benzoic acid. The eutectic temperature and composition of mandelic and benzoic acid mixtures were determined. And finally‚ an unknown was identified by its mixtures and melting point. The melting point of a compound is used by organic chemists not only to identify the compound‚ but also to establish its purity. To determine the melting point two
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CSEC CHEMISTRY NOTES ON SOLUBILITY OF COMPOUNDS IN WATER and SATURATED SOLUTION Reference: Chemistry‚ a Concise Revision Course for CXC by Anne Tindale From Chemistry for CSEC by Tania Chung-Harris and Mike Taylor Factors that influence solubility Temperature * The solubility of solids in liquids generally increases as temperature increases. * The solubility of gases in liquids generally decreases as temperature increases. (gases are less soluble in warm water than in cold water)
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SCHOOL ELECTIONS - guidelines Pedagogic In-Service Training Programme ISTP CBC PCC EED DED School elections – guidelines. 2009. UNAFAS & ISTP. UNAFAS‚ BP 307‚ Yaoundé. Cameroon. www.unafas.org ISTP‚ BP 5105‚ Bamenda. Cameroon. With support from the British High Commission‚ Yaoundé. Cameroon. School elections guidelines Preface Elections are the process of choosing a person or a group of people for a position‚ usually by voting. The election process builds leadership and social
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producing another action potential (Stillman‚ 2005). In this lab‚ compound action potentials (CAPs) will be measured from an isolated sciatic nerve from a cane toad‚ Bufo marinus. Compound action potentials are the total sum of action potentials from the multitude of neurons that compose a nerve (Stillman‚ 2005).
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Introduction “The history of all hitherto existing society is the history of class struggles.” (Tucker‚ 1978). These words began one of the most famous pieces Karl Marx ever wrote‚ The Communist Manifesto. In this work‚ he railed against what he perceived to be the evils of capitalism and called upon the workers around the world to unite to bring an end to this exploitative system once and for all. Communism was to rise and free all people from the shackles of the bourgeoisie and allow them to go
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Synthetic Organic Compounds Synthetic organic compounds are a relatively new discovery in the field of chemistry but have had a major impact on the world. These compounds differ from organic compounds as they are manmade. Synthetic organic compounds have been damaging people and the environment since they were created. Synthetic compounds such as chemical pesticides‚ herbicides and fertilizers have been beneficial to food production and
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Methylprednisolone sodium succinate 1) Structure: 2) Name: Methylprednisolone sodium succinate 3) A-Methapred is a sterile powder used as an anti-inflammatory glucocorticoid‚ which contains methylprednisolone sodium succinate as the active ingredient. A-METHAPRED™ is available in several strengths and packages for intravenous or intramuscular administration. It is used as replacement therapy in adrenocortical deficiency states. Their synthetic analogs are primarily used for their anti-inflammatory
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Discussion for Experiment 1 (Basic Laboratory Operations and Identification of a compound : Chemical Properties) In the first experiment‚ the precision of instrument was studied by measuring the mass of water for several times. The result shows that the mass measurement of the balance is precise since the masses of water in six trials are somewhat close. The reason that the masses of water in each trial are not identical may come from the high sensitivity of the balance that keep fluctuating due
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The purpose of the first part of the experiment was to produce a chemical compound which was the alum crystals by using aluminum‚ potassium hydroxide and sulfuric acid. After the compound was present‚ the purpose of the second part of the experiment was to make sure that the compound that was formed in the first half of the experiment was actually alum. Some of the experimental techniques that were used in this experiment was filtration using the Büchner funnel vacuum filtration‚ recrystallization
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ANTACIDS- Classification and Mechanism of Action INTRODUCTION Antacids are defined as a substance‚ generally a base‚ which counteracts stomach acidity. The name antacid means anti-acid (against acid). Antacids are the primary treatment for ailments such as gastric reflux‚ gastritis‚ upset stomach and heartburn. Hydrochloric acid is secreted by the stomach to kill harmful organisms‚ aid digestion and activate digestive enzymes. Excess secretion of acid into stomach or impaired resistance by
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