expected melting point. After its temperature reached the plateau‚ the temperature increment was set at 1°C per minute‚ and the melting point range of 152°C-154°C was recorded. After standardizing the melting device‚ a small sample of unknown carboxylic acid was placed in a capillary tube‚ and an arbitrary plateau of 200°C was set. When the sample started to melt at 150°C‚ another capillary tube containing a small amount of unknown sample was placed in the melting device‚ and the plateau was set to 135°C
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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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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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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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Properties of Acids and Bases Diagram: A B C D E F Bromothymol Blue Universal Indicator Phenolphthalein Litmus Paper Analyze: 1) F‚ C‚ D‚ B‚ A‚ E 2) D is neutral because it turned to the colour of green when it came in contact with the indicator Bromothymol Blue. The acid or base is green between 6.0-7.6 pH. 3) Solution E is more alkaline (more basic) than solution A because when E came into contact with the indicator Bromothymol Blue it turned
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TEABAG EXTRACT AS AN ALTERNATIVE FOR INK An Investigatory Project Chapters 1- 3 Submitted by: Alfonso‚ Manuela Fairbanks Garcia‚ Tonica Paga Cho‚ Jung Hun Lat‚ Manuel Miguel Feliciano November 2013 Chapter I Introduction A. Background of the Study The group will conduct the study because the group noticed that teabag extract is dark in colour and it can be use to make ink‚ and also the group noticed that teabags are made from natural resources. Some kinds
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at 1 M (10 mL per run) • 110 mL of NaOH at 0.5 M (10 mL per run) • 220 mL of Acetic Acid at 50% (10 mL per run). • Vernier Temperature Probe. • Erlenmeyer Flask 200 mL. • Graduated Cylinder 25 mL. • Charged Computer with LoggerPro. Method: I gathered all my materials along with obtaining a lab coat‚ safety glasses‚
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Harvard Business School 9-792-060 Rev. April 28‚ 1993 Acid Rain: The Southern Company (A) Early in 1992‚ managers at the Southern Company were reexamining their strategy for complying with the acid rain provisions of the 1990 amendments to the Clean Air Act. The Southern Company was a holding company; its operating units were electric utilities in Georgia‚ Alabama‚ Mississippi‚ and Florida. The largest Southern subsidiaries‚ Georgia Power and Alabama Power‚ provided most of the electricity
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ids Acids‚ Bases‚ Buffers and Respiration Darlene E. McDonald WCCC Fall 2012 Ap Lab 071-07 Dr. Roxanne Levandosky August 31‚ 2012 I. INTRODUCTION: A.PURPOSE: a. To define and understand the key terms. ~acid ~buffer system ~base ~acidosis ~pH ~alkalosis ~pH scale ~hypoventilation ~pH indicators ~hyperventilation b. To determine the acidic or base nature and actual pH of various substances. c. To discuss the formation of the carbonic acid/bicarbonate ion
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GCSE SCIENCE COURSEWORK (CHEMISTRY) PLANNING: Skill Area P Write down the aim of your Investigation. To investigate the effects of change in concentration on the rate of reaction between Sodium Thiosulphate and Hydrochloric Acid. Briefly describe your Preliminary Experiment and include your results. Explain how these results have helped you plan your main experiment (p8b). An increase in concentration will lead to an increase in the rate of reaction because there will be a greater number of
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