Introduction Extraction is a purification technique used in organic chemistry to separate compounds from a mixture of two or more compounds. There are three different extraction techniques: liquid-liquid extraction‚ solid-liquid extraction and chemically active extraction. All three types of extraction follow the same principle. Organic molecules dissolve in organic solvents and polar molecules dissolve in aqueous solvents. This phenomenon is observed because of the intermolecular forces between
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Synthesis and Purification of Acetylsalicylic Acid (ASA or Aspirin) Background Salicylic acid is a phenol as well as a carboxylic acid. It can therefore undergo two different types of esterification reactions‚ creating an ester either with the hydroxyl or with the acid. In the presence of acetic anhydride‚ acetylsalicylic acid (aspirin or ASA) is formed. Correspondingly‚ an excess of methanol will form methyl salicylate‚ which is also an analgesic. In this experiment‚ we shall use
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A substance abuse addiction can be described in many ways. The NIDA states that a “drug addiction is a chronic disease”. People abuse drugs despite the many consequences that it can have‚ especially changes in their brain. The start of any drug addictions begins with the use of taking drugs over time. After taking drugs for an extended period of time‚ it becomes a compulsive behavior that has major long-term affects on your brain function (NIDA‚ 2016). Up until 1906‚ drinking and substance use
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Quantitative Separation of a Mixture Lab Pre-Lab Questions: 1. Define the following: Physical Change Heterogeneous Mixture Sublimation Filtrate Residue 2. List two physical separation methods. 3. List the formula for determining percent composition by mass. Objectives: 1. to separate a three component mixture and 2. determine the percent composition by mass of each component in the mixture. Materials: Ammonium chloride (NH4Cl)‚ Sodium chloride (NaCl also known as
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Recrystallization of Benzoic acid Chemistry 204-002 Date: 4/9/2011 Hector Ortega Recrystallization is a method used to purify compounds‚ and this is a very important procedure because compounds are naturally impure. Polarity and solubility play a big role in this experiment and these characteristics are exploited in order to have a crystallization of the desired compound. In this experimented benzoic acid was crystallize using ethanol and water. I chose these solvents based on part C of the experiment
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of the Constitution gave this country purpose; a want to become a naturalized citizen of this country. Separation of Powers is very intrinsic‚ for the different types of government. In Document 4‚ the Legislative Branch makes the laws. The Executive Branch carries out and enforces the laws. The Judicial Branch interprets laws and punishes those who break the laws that are enforced. The Separation of Powers is very vital to this country‚ in ways such the Executive Branch has all of the power‚ and no
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Ethanoic Acid Advantages: Ethanoic acid is non-toxic and is a weak acid‚ meaning it will not do any damage to most surfaces as it does not corrode or bind to other metals‚ therefore can be easily removed through washing or rinsing it. Disadvantages: Ethanoic Acid is the slowest de-scaler of the three acids‚ and is therefore the least effective. It also may cause an unpleasant smell‚ and can have a negative effect on the taste of coffee meaning one would need to spend longer time rinsing and cleaning
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consisting of at least five judges and ex-judges. Under the constitution‚ they are empowered to interpret the Articles of the constitution. They also have power to declare any laws to be invalid or any executive acts to be unlawful. 1.2 Separation of Power Separation of power is a basic and important doctrine in all democratic countries. This doctrine was introduced by a French philosopher named Baron Montesquieu in 1748. He proposed that the powers of a state should be divided into 3 branches‚ each
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1. They play Six Degrees of Separation was about how a young man by the name of Paul Poitier conned his way into the lives of multiple families in New York City. These families for the most part‚ where part of the upper-wealthy class of society. The beginning of the play starts with Paul Poitier barging in unexpectedly at the Kittredge’s home claiming he was mugged and whoever did it stole his thesis. He also has a stab wound in his lower abdominal. He told the Kittredge’s that he knew their children
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Descartes famously proposed the conception of the mind and body as two distinct substances. Substance dualism is one of his famously philosophical stances. According to this philosophical position‚ the mind and body can exist as two separate substances that can exist independently. Descartes commences by noting that the basis of his opinions have been his senses and we cannot be sure that our minds are not deceiving us. It is as such because we cannot be sure that our exciting thoughts of the world
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