Extraction of R’-NH2 For both of the organic acid and organic base extraction‚ the addition of the respective inorganic acid or inorganic base (HCl or NaOH) to the three-component mixture caused an immiscible appearance of the solution in the separatory funnel. By briskly shaking the separatory funnel with the mixed components created a build up of pressure which was released through the stopcock forming small disappearing bubbles within the tip of the separatory funnel. Once the funnel was placed
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The pKa of a weak acid (p-nitrophenol) and its conjugated base (p-nitrophenolate ion) was determined by plotting pH as a function of [A-]/[HA] in order to represent the ionized and unionized regions across pH. The optimal wavelength (λm)‚ where the maximum absorbance occurs was determined by making twelve solutions where p-nitrophenol/pH is completely ionized (pH 9.0). The importance of determining the proper λm is this
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REVIEW SHEET EXERCISE 3 Neurophysiology of Nerve Impulses NAME: LAB TIME/DATE: Eliciting (Generating) a Nerve Impulse 1. Why don’t the terms depolarization and action potential mean the same thing? Action potential is a quick depolarization followed by a repolarization. Depolarization is a one way trip. It also takes a substantial depolarization to cause an action potential. 2. What was the threshold voltage in Activity 1? 3.0 V 3. What was the effect of increasing the voltage?
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Purpose: This paper is to identify and explain the in-store shopping environment effects that drive consumers’ impulse buying decisions. Methodology: Primary data is collected from 100 randomly selected shoppers in Abbottabad and Islamabad. Descriptive data analysis along with test of significance was applied to analyze data. Findings: Results indicate that presence of an enjoyable‚ pleasant and attractive in-store shopping environment increases the chances of impulsive buying among consumers
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Names are supposed to be a method of identifying someone or something and giving it meaning and power. All thoroughout time a name has either equated to respect for deeds accomplished‚ horror for attrocities committed‚ or disdain for the hours that name equates with a sloth invalid who only sits on the couch and watches re runs of Battlestar Galactica. Which lets of course face facts the only beautiful women on that show are killing spree heavy cyborgs. Back on the topic‚ great care should
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Job Safety Analysis | Job Title: Renovation work of Cleaning Ceiling Lighting | Location: the Atrium in Shopping Mall | Department: Tech. Department | Responded by: | Date: | | | | | A. Priority job | B. Sequence of Job Step | C. Potential Hazards | D. Preventive Measures | I. Erecting the mobile tubular scaffold | 1. Selecting qualified person or subcontractor | * Employ no experience worker or ineligible subcontractor erect scaffold which will increased
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The cell cycle is important as old cells get damaged and have to be replaced with new cells for the functioning of the body. If new cells are not formed the human body will stop working within a few minutes. The cell cycle is defined as an orderly sequence of events in which a somatic cell duplicates its contents and divides in two. When a cell reproduces‚ it must replicate all its chromosomes to pass its genes to the next generation of cells. The cell cycle consists of two major periods: interphase
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How Acetylsalicylic Acid was Discovered Acetylsalicylic Acid in its earliest form was a powder for the bark and leaves of the willow tree. Hippocrates‚ who lived sometime between 460 B.C. and 377 B.C‚ founded it. This “Miracle Drug” that was able to relieve pains was later looked into with further detail by Johann Buchner. He isolated a tiny amount of bitter tasting yellow‚ need- like crystals‚ and called salicin. By 1829 French Chemist Henri Leroux had improved the extraction procedure to
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Jarrett Sears Dr. Hummel Chem 121 2/7/13 A Chemical Reaction between Tin and Nitric Acid Introduction: Finding the products made from the components of tin metal and nitric acid is the ultimate objective of this lab; the formula of the products will be found in the CRC handbook thereafter. Procedure: First‚ obtain a clean crucible‚ and heat it under a Bunsen burner until it is as hot as possible‚ about 15 minutes within a fume hood unit. The Bunsen burner will be used under the fume
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Punished by Acid Several people from the third world become a victim of an acid attack. The victim’s life has changed tremendously‚ which is what the photographer shows with his world-known pictures. On Ebrahim Noroozi’s photoseries you see a mom named Somayeh and her daughter‚ Rana and what acid has done to their faces. Now they most stay by themselves and take care of themselves. It is hard for me to understand some people will walk up to you to pour acid on you. Somayeh looked like an average
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