TWO-BASE EXTRACTION OF BENZOIC ACID‚ 2-NAPHTHOL‚ AND NAPHTHALENE FROM UNKNOWN SAMPLE # 131 Douglas G. Balmer (T.A. Mike Hall) Dr. Dailey Submitted 11 July 2007 Introduction: The purpose of this experiment was to separate a sample of benzoic acid‚ 2- naphthol‚ and naphthalene of unknown proportions using a two-base extraction method. The three components of the mixture will react differently to sodium bicarbonate and sodium hydroxide because each of the bases’ conjugate acids has a different pKa
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Experiment 2&3 Recrystallization and Melting Points Determinantion of Benzoic Acid Abstract In experiment 2‚ recrystallization was used to purify the crude benzoic acid extracted from a mixture during experiment 1. Then a percent recovery for this recrystallization process was calculated. In experiment 3‚ the melting point ranges of the crude and purified benzoic acid were both determined by using Melt Temp Apparatus. Introduction Recrystallization is a purification technique for non-volatile
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De-esterification for Synthesis of Benzoic Acid BATCH REACTOR Shane Bulk Chris Crosley David McGuire Max Skula Yunjing Song Shriram Sundarraj Nelson Zhou 155:416 Process Laboratory II Professor Jerry Sheinbeim January 28 – February 28‚ 2014 ABSTRACT The observed reaction that took place in this experiment was the de-esterification of ethyl benzoate to form benzoic acid. This experiment was used to determine the rate constant k of the synthesis of benzoic acid at different temperatures
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Existentialism : Here & Now Existentialism aimed to explore and encourage personal sensory detail via the thought processes of human beings. “Existentialism stressed the special character of personal‚ subjective experience and it insisted on the freedom and the autonomy of the individual” (Wolf). The philosophy of existentialism‚ and one of its greatest philosophers Jean Paul Sartre‚ were the motivation and inspiration to the arts and humanities during the 1940’s and 1950’s. First allow me to
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Synthesis of Benzoin Date of Experiment: 1-26-15 Chelsea Price Lab Partner: Joey Simmons Abstract: In this experiment‚ benzoin was synthesized from benzaldehyde‚ using thiamine hydrochloric acid as a catalyst. The thiamine HCl was deprotonated by sodium hydroxide and acted as a nucleophile to attack the benzaldehyde. A water-cooled condenser was used to heat the solution at reflux. Vacuum filtration was used to wash and dry the product. The benzoin product was recrystallized
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Discuss the roots and emergence of McCarthyism in the late 40s and early 50s. Though the Communist Party of the United States (CPUSA) peaked with it’s highest number of members in 1940-1941‚ with 750‚000 members‚ by this area in time it was looked down upon. It had‚ earlier in the decade‚ been a successful agent against fascism and a huge help in the advancement and creation of labor unions‚ and for that reason people were joining it. However‚ many people were becoming communists unknowingly just
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Experiment 11 Title: Spectrophotometric analysis of caffeine and benzoic acid in soft drink. Name: Tan Herh Lim Name of partner: Sia Ting Wai‚ Chong Zheng Yee Date: Lecturer: Dr. Neo Kian Eang Practical class: P1 Objective: To obtain the absorbance of the caffeine and benzoic acid in soft drinks. Introduction Soft drinks that commonly found in our daily life contain caffeine and sodium benzoate. The caffeine act as a stimulant and the sodium benzoate acts as a preservative
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Exercise 10: Acid/Base Balance Worksheet Assignment Due: Week 1 GRADE 94 Student instructions: Follow the step-by-step instructions for this exercise found in your text and record your answers in the spaces below. Submit this completed document by the assignment due date found in the Syllabus. Please make sure that your answers are typed in RED. Please type your Name and Student ID Number here: Paul M. Nannery 4006529 Respiratory Acidosis and Alkalosis Activity 1: Normal Breathing
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procedure. Results and Analysis {Limiting reagent} Mass benzoin = 2.0050g (0.00945 mole) Mass sodium borohydride = 0.4059g (0.0107 mole) Mass compound A used to form compound B = 1.0647g Results Mass (g) moles Molecular formula Yield (%) Mp (pure) Compound A 1.7458 0.00815 C14H14O2 86.22 138-139 Compound C 0.4255 0.001988 C14H14O2 40.02 136-138 Spectral Analysis IR Absorption (cm-1) Assignment Benzoin 3411‚ 3374 OH 2961‚ 2903 C-H aromatic 2358 C-O
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EXERCISE 10: Acid-Base Balance ACTIVITY 1: Hyperventilation | Answers | 1. A substance that dissolves in water to release hydrogen (H+) ions is called a(n) _______. | Acid | 2. Which of the following is not a regulatory mechanism for acid/base balance in the body? a. the kidneys b. the respiratory system c. protein buffers d. the digestive system | D. The digestive system | 3. The maximum pH measured during hyperventilation was _______. | 7.67 | 4. Describe the
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