Extraction: Separation of an Organic Acid‚ Base and a Neural Compound Introduction/Background Acid base extraction is a widely used commercial method in separating acids‚ bases and neutral compounds. This is concept is based on several physical properties of the compounds‚ such as boiling point‚ melting points and solubility. The different solubility properties of the protonated and non-protonated forms of these compounds depend on the functional groups present‚ such as carboxylic
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Figure 1 describe the total phenolic content of coffee (raw‚ roasted and spent) and black tea (raw and spent tea). Both of coffee and black tea contain reasonable amount of phenolic‚ however‚ the total phenolic compound in black tea is much higher than those of coffee‚ which was found to be 104.3 and 187.50 mg GAE /g in raw coffee and black tea‚ respectively. Similarly‚ the spent coffee contained less amount of phenolic (97.87mg GAE /g) than those in spent black tea (152.87 mg GAE /g). The analysis
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Dalton’s atomic theory states that elements combine in simple numerical ratios to form compounds. A compound‚ no matter how it is formed‚ always contains the same elements in the same proportion by weight. The law of mass conservation states that mass can neither be created nor destroyed. In this experiment‚ the mass of the metal was not destroyed or created; the metal’s mass was simply changed into a compound form once the gas reacted to it. The net mass of the reactant side of the equation and
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bonds to a compound. In a reduction reaction the oxidation number of a carbon atom decreases. The opposite is an oxidation reaction in which the carbon atom oxidation number increases. In compounds with double or triple bonds a reduction reaction can occur by adding hydrogen atoms across the pi-bond. This can change an unsaturated compound to a saturated compound. Saturated means that the compound has the maximum amount of hydrogen bonds with no double or triple bonds in the compound while unsaturated
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Chemical Bonding Lab Chemical compounds are combinations of atoms held together by chemical bonds. These chemical bonds are of two basic types—ionic and covalent. Ionic bonds result when one or more electrons from one atom or group of atoms is transferred to another atom. Positive and negative ions are created through the transfer. In covalent compounds no electrons are transferred; instead electrons are shared by the bonded atoms. The physical properties of a substance‚ such as melting point
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Flame Test Lab Question: When a compound is placed in the flame of a burner‚ what happens to the color of the flame? Hypothesis: When the compound is placed in the flame‚ the flame changes color depending on the chemical compound. When they’re heated‚ they gain energy and changed color sometimes. Safety Requirements for this Lab: Wear goggles at all times. If you want to remove them to write in your notebook you may sit at a table in the center of the room. When you sit down remove them
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favorite elements‚ they must be Hydrogen‚ Carbon‚ Nitrogen and Oxygen. These four elements make up the majority of all Biological compounds. Without them‚ life on this planet as we know it could not exist. Due to the bonding possibilities between and among these elements‚ literally millions of organic compounds are possible. Carbon is the backbone of all organic compounds. It forms the main structure of the molecule with Hydrogen‚ Nitrogen‚ Oxygen and occasionally other elements replacing Carbon or
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able to identify them. This lab also focuses on observing the reversibility of hydration reactions by hydrolysis‚ and also testing substances for efflorescence of deliquescence. Procedure: A. Identification 1. Place 0.5 grams of each compound (Nickel Chloride‚ Potassium Chloride‚ Sodium Tetraborate‚ Sucrose‚ Calcium Carbonate‚ and Barium Chloride) in a small dry test tube. 2. Heat gently with a burner flame and observe carefully. If droplets of water appear on the test tube it
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immiscible solvents ii) partioning of a compound between two immiscible solvents and determination of KD iii) liquid-liquid extraction with aqueous acids and bases with organic solvents. iv) use of drying agents Introduction Liquid-liquid extraction is a method used for the separation of a mixture using two immiscible solvents. The ability to separate compounds in a mixture using the technique of liquid-liquid extraction depends upon how differently the compounds of the sample mixture partition themselves
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Eli has a lot of moments in his while living in the compound. One big moment Eli has is when he walks into the compound and the silver door locks (Bodeen‚ 2008‚ p.2). The door is symbolic because it is thought of every time Rex is brought up for putting them in the compound. It means they are safe but also in danger. This was a big moment because he was locked in the compound for 15 years now. Eli and his family entered the compound because a fake nuclear attack occurred. This fake nuclear attack
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