chemicals. The modern day chewing gums are made of four major ingredients including synthetic rubber‚ plastic‚ sugar‚ and coloring (dye). Modern day gums are produced from synthetic polymers such as styrene- butadiene rubbers and polyvinyl acetate. The final product is composed of 60% sugar‚ 20% corn syrup‚ and only 20% actual gum material. People do not typically swallow gum‚ so they pay very little attention to the ingredients. The assumption is that if it is not swallowed‚ then it
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Date: May 22‚ 2012 Name: Cristhian Valor Organic Laboratory Pre-Lab 1. Main reaction sequence including side reaction products: 2. 3 Sentence Summary of the Experiment: The OH group on the benzene ring in salicyclic acid reacts with acetic anhydride to form an ester functional group. Thus the formation of acetylsalicyclic acid (aspirin) is referred to as an esterification reaction‚ which requires the presence of H+ (H2SO4 in our case). The technique used to purify the aspirin content
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Kalamkari the ancient Indian art of painting Kalamkari refers to a method of painting natural dyes onto cotton or silk fabric with a bamboo pen or kalam. The name kalamkari translates as pen (kalam) work (kari) in Hindi/Urdu‚ and was most likely derived from trade relationships between Persian and Indian merchants as early as the 10th century CE. European merchants also had names for this type of fabric decoration: the Portugese called it pintado‚ the Dutch used the name sitz‚ and the British preferred
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Approximately 400 words‚ 5 organized paragraphs. To consider: Framing and composition Themes and motifs Character design Setting Cel animation: Sometimes called traditional animation is hand drawn‚ frame-by- frame on paper and or celluloid/acetate sheets. Iris-in: A shot that opens from darkness in an expanding circle of light. Iris-out: The opposite of an iris-in. Morph: Short for metamorphosis. The action is continuous and one object or action transforms into another. Reflexivity: reflexivity
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silicate‚ artisans also helped with the discovery of a bright yellow made from lead and antimony oxides‚ the vinegar fumes used to corrode lead and copper into lead white 2PbCO3•Pb(OH)2‚ and green also known as verdigris copper(II) acetate. The red color known as vermillion demonstrated an important cross between are and chemistry in color. Vermilion is made up of mercury sulfide‚ which has been used as a pigment since roman times. Chemists discovered that by making the compound by purposefully combining
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EXPERIMENT 4 Title: Preparation of magnesium sulphate. Date:11.02.2010 Aim: To prepare magnesium sulphate Theory: Magnesium sulfate (or magnesium sulphate) is a chemical compound containing magnesium‚ sulfur and oxygen‚ with the formula MgSO4. In its hydrated form the pH is 6.0 (5.5 to 6.5). It is often encountered as the heptahydrate‚ MgSO4·7H2O‚ commonly called Epsom salt. Anhydrous magnesium sulfate is used as a drying agent. Since the anhydrous form is hygroscopic (readily absorbs water
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our buffer 2 solution. Buffer 1 has a pH of 5.12 while buffer 2 has a pH of 5.66. This would be because buffer 1 has a higher concentration of acid. Buffer 1 contained 12mL of acetic acid and 34mL of sodium acetate‚ while buffer 2 contained only 3mL of acetic acid‚ and 44mL of sodium acetate. Buffer 1’s pH would be lower because it contains a higher amount of acid‚ on top of a lower amount of base‚ as compared to the amounts of acid and base in the buffer 2 solution. 2. What is the difference between
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acid Chemical Name: Acetic acid or ethanoic acid Chemical Formula: C2H4O2 Chemical Structure: pH: 2.4 Classification: Weak acid Uses: It is used as household vinegar and is mainly produced as a precursor to polyvinylacetate and cellulose acetate. Diluted acetic acid is often used indescaling agents. In the food industry‚ acetic acid is used under the food additive code E260 as an acidity regulator and as a condiment. Name: Formic acid Chemical Name: Methanoic acid‚ HCOOH Chemical
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decrease. 3. The cold water was used to decrease the solubility of Luminol in the solvent and prevent further reactions‚ if hot water was used the efficacy of the filtration would decrease. 4. When isolating the Luminol solid solvents like ethyl acetate and DCM should not be used because it would have dissolved (like dissolves like) in these solvents
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give flavor to their food and also treat diseases. It rapidly reached China and other Asian countries by the help of trade. Its chief components are Carvacrol‚ Thymol‚ Cymene‚ Caryophyllene‚ Pinene‚ Bisabolene‚ Linalool‚ Borneol‚ Geranyl Acetate‚ Linalyl Acetate and Terpinene. The application of oregano had grown and is still expanding worldwide because of the advancement in science and technology that maximized and specified the capabilities of this plant. (History of Oregano. Retrieved August 17
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