(in the second centrifuge tube). Now wash (microscale) the combined extracts with saturated NaCl solution (5mL)‚ then with 10% aqueous potassium carbonate (5mL)‚ then with saturated NaCl solution (5 mL) again. Dry the organic layer with anhydrous sodium sulfate. Decant the organic layer into a small beaker and concentrate to roughly 0.2 mL by evaporation in the hood (do not apply heat!). If the sample goes to dryness‚ re-dissolve in hexane (0.2 mL). *Set aside a small amount of your crude
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SALT WATER Introduction: Salt water refers to water that contains dissolved salts‚ known as saline water or seawater‚ water from oceans or seas. It is a home to varieties of aquatic animals‚ for example‚ fishes and snails. Some of these animals find it difficult to live in fresh water. If salt water animals go to live in fresh water they can not adapt the environment led to die to them. This essay aims to discuss the importance of salt water and the sub- types namely ocean‚ sea‚ and coral reefs
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Essay points to concentrate on: - Russian organic market continues to grow‚ which is indicated by the recent statistics compared from 2011 to 2012 that reached $148 million in 2012. A 7.8% growth was indicated since 2011. - The lack of Russian certification system seems to pose a challenge on the expansion of organic food demand in Russia. - In 2015‚ Russian organic food is expected to boom significantly in the future due to the law that is going to be enforced by obtaining the certification
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Organic Food Once found only in health food stores‚ organic food is now a regular feature at most supermarkets. And that’s created a bit of a dilemma in the produce aisle. On one hand‚ you have a conventionally grown apple. On the other‚ you have one that’s organic. Both apples are firm‚ shiny and red. Both provide vitamins and fiber‚ and both are free of fat‚ sodium and cholesterol. Which should you choose? The word "organic" refers to the way farmers grow and process agricultural products‚ such
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Exp. 2A-D Solubility (pp.13-20) In this experiment‚ I will be determining/investigating the solubility of different solvents‚ or more precisely‚ the extent to which a substance is soluble or insoluble (Part A and B). Another goal of this experiment will be determining miscible (liquids that will mix homogeneously) and immiscible (liquids that do not mix homogeneously) parts in liquids (Part C). Part D of the experiment will be looking at solubility as well‚ the solubility of organic acids and
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Lab #4 The Synthesis of Organic Polymers CHM2123‚ Section C October 21‚ 2014 Introduction: Organic polymers are macromolecules that are composed of smaller molecules called monomers. There are two main groups of polymers: natural polymers and unnatural (synthetic) polymers. Natural polymers include proteins such as cellulose and starch and are a necessity for our existence. On the other hand‚ synthetic polymers such as the polycarbonate in our lab goggles
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Are Organic Foods All They Are Hyped Up To Be: An Overview Of The Organic Food Industry Today‚ with cancer and obesity cases increasing quickly‚ people are turning their attention to the foods they are consuming. Such diets as the vegan‚ vegetarian‚ lacto-vegetarian‚ paleo‚ raw‚ and locavore are becoming more and more popular. The one thing these diets all have in common is the belief that organic foods are better than conventional foods. Similar to conventional foods‚ organic foods contain chemicals
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systems and‚ in turn‚ resulted in the loss of nutrition and local farming. Organic farming provides not only an alternative safe and healthy farming model‚ but a way to correct the flaws in our current system. There are many benefits of organic foods and organic farming. Organic foods are free of harmful chemicals‚ artificial flavors‚ and preservatives. Conventional farmers use over 300 different pesticides to grow non-organic foods. The current process used in food production render little to no
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Mrs. Mercer Hon. English 1 13 February 2012 Organic Farming “Pesticide residues have been ranked among the top three environmental cancer risks by the American government” (Cleeton). This startling statistic fuels some of the arguments between organic farming and conventional farming. Although organic products cost more‚ they have many benefits to humans and rural societies. Organic farming is better than conventional farming because of the benefits to the natural environment‚ the methods
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CH 127 – Chem 2 Lab Determination of an Equilibrium constant Goals The purpose of this experiment is to determine the equilibrium constant for the reaction Fe3+(aq) + HSCN(aq) –>FeSCN2+(aq) + H+(aq). The equilibrium constant expression Kc for Reaction is kc=FeSCN2+[H+]Fe3++[HSCN] Procedure *Preparation of the Beer’s law plot Prepare five solutions of FeSCN2+(aq) of known concentrations between 1x10-5M and 1x10-4M by diluting various volumes of 4.62x10-4 HSCN. Calculate the Final concentration
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