Separating Substances: Identifying Food Dyes with TLC Background The color of food is an integral part of our culture and enjoyment of life. Who would deny the mouth-watering appeal of a deep-pink strawberry ice cream on a hot summer’s day or a golden Thanksgiving turkey garnished with fresh green parsley? Even early civilizations such as the Romans recognized that people "eat with their eyes" as well as their palates. Saffron and other spices were often used to provide a rich yellow color
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Searching for Bobby Fischer While watching the movie Searching for Bobby Fischer‚ I was able to analyze the young chess prodigy‚ Josh‚ very easily. Through his actions and mindset‚ his social and cognitive abilities were revealed. The interactions between Josh and his father‚ Josh and his chess teacher‚ and his mother and father also played a major role on his development. According to Piaget’s Stages of Cognitive Development‚ Josh would be placed in the Formal Operational State. His level
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Esterification Lab Introduction Esterification is an important part of organic chemistry that has many practical applications. Esterification can be used to make polymers. In most cases‚ esters are used for scents – they often smell fruity and sweet. In general‚ an esterification reaction results from a condensation reaction between a carboxylic acid and an alcohol. The carboxylic acid group loses an OH group‚ and the alcohol loses and H. For instance‚ the reaction between methanoic acid and methanol
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Isoamyl Acetate Synthesis through Fischer Reaction Lesaca‚ Anna*‚ Lopez‚ Maria Flor‚ Lu‚ Ricardo‚ Magdurulan‚ Tricia 2Biology6‚ Department of Biology‚ College of Science‚ UST‚ Manila annalesaca@yahoo.com Abstract Esters are a type of functional group that causes distinguishable flavors or odors of some fruits. It can be synthesized by Fischer reaction‚ which is an acid-catalyzed reaction of an alcohol and carboxylic acid. One of the esters known for its characteristic banana flavor is the isoamyl
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was swirled until the greatest amount of each solid was dissolved. Each solution was spotted along a labeled starting line on the silica gel TLC plate. The TLC plate was put into a developing chamber containing 200:1 acetic acid and allowed to developed until the solvent reached almost to the top of the TLC plate‚ which took about 10 minutes. When the TLC plate finished developing‚ I observed the plate under UV light and noticed that the salicylamide was the only spot that fluoresced purple while
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BACKGROUND: Esterification is a reaction that combines an alcohol with an organic acid‚ with a water molecule is being taken out‚ and an ester is formed. A concentrated acid catalyst speeds up the esterification. In this experiment set up‚ sulphamic acid was used‚ as it is a solid acid and be added dry‚ without any water‚ which is a reactant in this experiment equilibrium. Esterification is a slow and reversible reaction. The equation for the reaction between an acid RCOOH and an alcohol RẬᶦ
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As we know‚ the TLC is a separation technique that has two phases: the stationary phase and mobile phase. The stationary phase is silica gel (SiO2) which is very polar compound‚ while the mobile phase is 0.5% acetic acid which has less polar. Also‚ as we know‚ the compound will rather to stay with stationary phase or travel with mobile phase depend on its polarity. The result show as that the polarity of the solvent is the key factor for the compound to travel with it or stay in stationary phase
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Hans Fischer is a well known chemist who was awarded the Nobel Prize for chemistry in 1930. The animal’s’ natural coloring matter‚ tissue of plants‚ and red blood pigments is what Hans Fischer dedicated his scientific career to. Because Hans Fischer’s father was the director of the chemical dye‚ Hans was well acknowledged of the color of chemicals‚ which is known as the chemistry of color. Hans Fischer was one of the best chemist‚ because he was awarded the Nobel Prize‚ researched biological pigments
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brother in arms despite never having met each other. It is with a heavy heart that I have to write this now‚ for the greatest man ever arrested for pot‚ Eugene Fischer. Arrested at age 47 after 5 years of running what would be known as the largest marijuana operation of it it’s time‚ Eugene had his first fight and lost; The battle of Eugene Fischer vs. The United States Government. His next battle was his more important one‚ the stuff that Hollywood movies are based on. In 2012 after serving 25 years
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TLC FULL LAB REPORT Objective: The purpose of this experiment was to identify compounds in a mixture by Rf values and to determine the best solvent to use. Also is the analysis of mixtures before‚ during and separation. Possible solvents: Hexane MW- 86.17 g/mol Hazards-flammable‚ harmful if swallowed Melting pt / boiling pt (degree Celsius) - 69 Density-.6548 g/ml [pic] Methanol MW-32.04 g/mol Hazards- flammable‚ eye irritant Melting pt / boiling pt- 65 Density-.7918 g/ml [pic]
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