Colegio de San Juan de Letran College of Liberal Arts and Sciences Experiment #3 SEPARATION AND PURIFICATION OF ORGANIC COMPOUNDS: CRYSTALLIZATION Gomez‚ Paola Anne M. DOP: 2 July 2013 Student no. : 4120403 DOS: 9 July 2013 Group: Carcinogenic Remarks: _____________________________________________________________________ Engr. C. D. Sanchez Instructor THEORETICAL DISCUSSION Crystallization is a technique which chemists use to purify solid compounds. It is
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Today‚ noncommunicable diseases (NCDs)‚ mainly cardiovascular diseases‚ cancers‚ chronic respiratory diseases and diabetes represent a leading threat to human health and development. These four diseases are the world’s biggest killers‚ causing an estimated 35 million deaths each year - 60% of all deaths globally - with 80% in low- and middle-income countries. These diseases are preventable. Up to 80% of heart disease‚ stroke‚ and type 2 diabetes and over a third of cancers could be prevented
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Synopsis The purpose of this experiment was for students to prepare some simple organic compound and to purify the compound by recrystallisation. This experiment allowed the students to conduct the synthesis of aspirin‚ acquire the skills of recrystallisation using normal filtration and reinforce the technique of the melting point determination. The method used to synthesize aspirin was esterification by reacting salicylic acid with acetic anhydride with the presence of dehydrating agent‚ conc
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oliferous is commonly considered as miracle plant that give numerous benefits. It serves as food and medicine .It contains fiber‚ vitamins different amino acids such as sitostererol the enzymes‚‚like pectinestrase. Apart from these benefits this study found malunggay to be a convenient source of organic household cleanser for furniture especially those made of glass. This process involved extracting organic residues from malunggay leaves using kerosene as soaking materials. The extract was then exposed
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were used to determine the melting point. 6. The bicarbonate extract was acidified with concentrated HCl. A piece of litmus paper showed that it was acidic. 7. The benzoic acid was extracted by shaking it with25ml portions of dichloromethane. The organic extracts were collected in a pre-weighed Erlenmeyer flask and evaporated on the steam bath. The mass of Benzoic acid produced was determined. RESULTS (i) Naphthalene: 0.85g; Benzoic acid: 0.71g (ii) The melting point of Naphthalene: 80-89º
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Structural Effects on Stability and Reactivity. Organic Chemstry Laboratory Structural Effects on Stability and Reactivity Introduction The concepts of stability and reactivity are fundamental to understanding chemistry. In this chapter we consider first the thermodynamic definition of chemical stability. We then consider chemical kinetics (Section 3.2) and how it can provide information about reactivity. We also explore how structure influences stability and reactivity. We want to learn how
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Chapter 3 1. 1 atom of X = atomic mass (amu) 1 mole f X=atomic mass in grams 1 mole of something = 6.022 x 1023 units of that substance 1 mole of a compound =66.022 x 1023 atoms 6.022 x 1023 amu =1 g 2. What is the mass of 6 atoms of Fe? Answer: 6 atoms of Fe x 55.85 amu÷atom of Fe x 1 g of Fe÷6.022 x 1023 amu = 3. How many atoms does it take to make 1 g of Gold (Au)? Answer: 197.0 g Au =1 mole of Au
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Table of Context 1． Introduction 2． Main Body 2.1 Difference between mechanistic organization structures And organic organization structure. 2.2 When might a mechanistic organisation structure be Preferable to an organic organization structure? 3． Conclusion 4． References List 1. Introduction The organizational structure is very important for a company. Different organizations will adopt different organisation structures to
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San Francisco Coffee House Case 1. Should Tensek and Pacek consider franchising over organic growth? Do a qualitative cost-benefit Analysis. (4 Points) In regards to whether Tensek and Pacek should consider franchising over growing additional business locations organically‚ there are many factors that the couple must take into account. Whether they choose to expand using a franchising or organic approach‚ there are major costs and benefits that will dramatically affect San Fransisco Coffee House
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2. Qualitative ORGANIC functional group tests in various homologous series | TEST FOR | TEST METHOD | OBSERVATIONS | TEST CHEMISTRY and comments | ALKENE or alkyne i.e. any non-aromatic unsaturated hydrocarbon with a double or triple carbon-carbon bond. | Bubble gas through‚ or add liquid to‚ a solution of bromine in hexane or water. | The orange/brown bromine rapidly decolourises‚ as a saturated colourless organic bromo-compound is formed. | R2C=CR2 + Br2 ==> BrR2C-CR2BrRCCR + 2Br2 ==> Br2RC-CRBr2R
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