small amount of the unknown (approximately the tip of the spatula was used for all the pigments) was added into each clean dry test tube. For the first test 1 mL of 3 M of HNO3 was added. As soon as the acid came into with the solid‚ the pigment was observed to dissolve while also turning the solution into a pale clear colour. The same amount was used for the HCl reagent. As soon as the acid touched the pigment it yielded in a clear solution (solid dissolved after a few shakes). When the KI was added
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4.d.p 0.0426 0.0606 0.1667 0.1538 0.1250 0.1176 0.0976 It is evident from the graph and the table above‚ that as the temperature is increased‚ the amount of light passing through the tested solutions is decreased‚ and therefore the amount of pigment released from the beetroot samples is increased. The results produce a graph with negative correlation‚ a curve that has a negative gradient. The graph shows that as the temperature is increased‚ the colorimeter reading is decreased. The structure
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Asymmetric Epoxidation of Dihydronaphthalene with a Synthesized Jacobsen’s Catalyst Justin Lindsey 12/08/96 Chem 250 GG Professor Tim Hoyt TA: Andrea Egans Abstract. 1‚2 diaminocyclohexane was reacted with L-(+)-tartaric acid to yield (R‚R)-1‚2-diaminocyclohexane mono-(+)-tartrate salt. The tartrate salt was then reacted with potassium carbonate and 3‚5-di-tert-butylsalicylaldehyde to yield (R‚R)-N‚N’-Bis(3‚5-di-tert-butylsalicylidene)-1‚2-cyclohexanediamine‚ which was then reacted with Mn(OAc)2*4H2O
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Urine Testing for Drugs of Abuse U. S. DEPARTMENT OF HEALTH AND HUMAN SERVICES • Public Health Service • Alcohol‚ Drug Abuse‚ and Mental Health Administration Urine Testing for Drugs of Abuse Editors: Richard L. Hawks‚ Ph.D. C. Nora Chiang‚ Ph.D. Division of Preclinical Research National Institute on Drug Abuse NIDA Research Monograph 73 1986 DEPARTMENT OF HEALTH AND HUMAN SERVICES Public Health Service Alcohol‚ Drug Abuse‚ and Mental Health Administration National Institute on Drug
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Preparation of Dibenzalacetone by the Aldol condensation David o Neill Date of experiment: 14/12/2011 Apparatus Steam bath‚ ice bath‚ Buchner funnel‚ beaker‚ conical flask‚ filter paper‚ TLC apparatus‚ Melting point apparatus Materials / chemicals Benzaldehyde‚ acetone‚ ethanolic sodium hydroxide‚ ethanol Introduction The synthesis of dibenzalacetone is formed from an Aldol condensation reaction. An Aldol condensation reaction is a very effective way of forming a carbon – carbon bond reaction‚ in
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“Shouldn’t you have to pass a urine test to get a welfare check since I have to pass one to earn it for you?” That’s the question many‚ hardworking Americans are asking themselves. In today’s America‚ government aid is highly depended on. The US government has spent $498 billion dollars this year on welfare alone. Mandatory drug testing for welfare applicants is becoming a popular idea across the U.S. Many states including Alabama‚ Kentucky‚ Oklahoma and Louisiana are considering adopting laws that
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example‚ the Pigment division in Core category had the role of cash provider. Therefore‚ it was difficult for this division to access to capital‚ major investment would violate their mandate‚ and payback period was set at two to three years. However‚ the Pigments division head recently proposed the plan for major investment in comprehensive modernization of a manufacturing plant in Newport which was the only global source for Sfr 130 million in sales of Quinacridone (HPP) pigments. Ciba needed
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HSC Chemistry First Hand Investigation 2009 Scientific Report Aim: To carry out a fist hand experiment in the extraction of red cabbage pigment‚ use this extracted pigment to standardize against know pH’s‚ test 5 household items to determine the possible pH of these items by using the standardization and assess the pigment’s ability to be used as a Universal Indicator. Risk Assessment: When dealing with fire‚ the Bunsen burner should always be switched to the safety flame before lighting.
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offered the opportunity to participate in a five-month internship at Henkel Laboratories by a valued professor who admired my work as his assistant. I spent my time reverse engineering several products using Gas Chromatography-Mass Spectrometry and High-performance liquid chromatography. I also learned how to accurately document the findings of my personal research to present to my
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Claire Drexler P2 Characteristics Used To Identify a Substance 1. We use chemical and physical properties to identify a substance. 2. Examples of physical properties: color‚ smell‚ freezing point‚ and viscosity 3. Examples of chemical properties: heat of combustion‚ PH‚ and electromotive force Physical Properties vs. Chemical Properties 1. Examples of physical properties: density‚ luster‚ and conductivity 2. Examples of chemical properties: reactivity with water‚ PH‚ and heat of combustion
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