Experiment 4 Synthesis of Salicylic Acid Introduction Throughout history‚ botanical extracts have been used as medicines. Approximately 30% of all medicines have a plant origin. This number increases to 60% if you consider medicines that at one time were derived from plants‚ but have been synthesized in the laboratory. Salicylic acid is a white crystalline compound that can be isolated from the bark of birch trees. Since it is a valuable substance that can be isolated from nature‚ it is called
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Estuary-Beach System. (Physical Component) Kutlo Thathe University Road Westville Private Bag X 5600 Durban 4000 210551705@stu.ukzn.ac.za Abstract This study was conducted at the Mpenjati Estaury which is located in Port Shepstone and lies along the south coast of Kwa-Zulu Natal. An estuary is a partially enclosed coastal body of water which is either permanently or periodically open to the sea and within which there is measurable variation salinity due to the mixture of fresh water derived from
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Amino acids are important building blocks; they play an essential role in the formation of proteins and as intermediates in metabolism. Amino acids can serve as cell signaling molecules and can regulate gene expression. An optimal amount of amino acids is essential for health. There are over 500 amino acids‚ however only 20 are commonly found. Amino acids all have an amine functional group and a carboxylic acid functional group. They differentiate from each other in their side chains. Only 10 of
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1. Separation anxiety is a common stage that a child go through‚ where the child becomes nervous and fearful when separated from parent‚ another caretaker or a person the child is attached to. This condition happens between 8 months of age to 3 years of age (Ricci‚ Kyle &Carman‚ 2013‚ pg. 1128). people’s attitudes about separation of babies are cultural‚ since western cultures encourage autonomy at a very early age while in other cultures separation of mother and baby is not encouraged especially
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Chapter V SUMMARY‚ CONCLUSIONS AND RECOMMENDATIONS This chapter summarizes the study by highlighting the research conducted on the topic. The conclusions given were drawn from the outcomes of the research and observations on the TITLE of respondents 1 and respondents 2. Moreover‚ recommendations were base from the findings and conclusion of the study. Summary The researcher designed and developed a TITLE using Programming Language. The general purpose of this study covered_____________________
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Synthesis of benzilic acid from benzoin utilizing a multi-step reaction. Names: Arian Karim TA Name: Sayantan Das Lab Day & Time: Thursday 7:30-11:40 Lab Section #: Abstract The main purpose of this experiment was to synthesize benzilic acid from benzoin. This requires a multistep synthesis with benzyl as an intermediate product. The first step required HNO3 as an oxidizing agent and the second step required KOH and HCl. The percentage yields of benzil and benzilic acid were 59.5% and 21
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BUFFERS By: Luis P. Bazan‚ RPh.‚ Ph.D. A buffer solution is a solution of: 1. A weak acid or a weak base and 2. The salt of the weak acid or weak base Both must be present! A buffer solution has the ability to resist changes in pH upon the addition of small amounts of either acid or base. Consider an equal molar mixture of CH3COOH and CH3COONa CH3COOH (aq) H+ (aq) + CH3COO- (aq) Adding more acid creates a shift left IF enough acetate ions are present 16.3 Which of the following
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term ( major‚ minor‚ and middle terms) can be represented by a circle. | | C. Since a syllogism is valid if and only if the premisses entail the conclusion‚ diagramming the premisses will reveal the logical geography of the conclusion in a valid syllogism. If the syllogism is invalid‚ then diagramming the premisses is insufficient to show the conclusion must follow. | | D. Since we have three classes‚ we expect to have three overlapping circles. | 1. The area in the denoted circle represents
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covering. 2. Using mortal and pestle‚ crush aloe vera and get it’s extract. 3. Pour the aloe vera extract‚ lemon juice and baby oil in pot and simmer using lower heat temperature until it boil. 4. After you simmer/boil the mixture‚ add the banana peel and continue to boil it. 5. Finally‚ if the solution became viscous‚ set it aside and make the insect repellant. Procedure #2: (for mosquito repellant) 1. First‚ clean the taheebo leaves and put under the sun to dry for 30 minutes to 1 hour. 2. After
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Experiment # 3 Acetylsalicylic Acid Introduction: The purpose of this experiment is to create and isolate pure acetylsalicylic acid from the substances salicylic acid and acetic anhydride. Then one will find the melting point to determine purity. Procedure: Make a hot bath. Weigh some salicylic acid and place in conical vial. Add .480mL of acetic anhydride and a drop of concentrated phosphoric acid. Drop in a magnetic spin vane and attach air condenser to vial. Partially submerge it in
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