with an acetic anhydride. Color impurities present in the solid acetaminophen will be removed and then the decolorized product will be collected on a Büchner funnel for further purification by crystallization. Purity will then be determined by melting point. Introduction: Acetaminophen is commonly used as an analgesic to reduce pain and fever. In this experiment it is prepared by the reaction of p-aminophenol with acetic anhydride‚ as illustrated below. Results: Isolation of crude acetaminophen The
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------------------------------------------------- MELTING POINT AND BOILING POINT OF ORGANIC COMPOUNDS ------------------------------------------------- ABSTRACT The melting point (MP) and the boiling point (BP) are probably the most widely used physical constant in the field of science. Determining the boiling point and the melting point of a compound helps you to characterize an unknown solid in a quick‚ easy and cheap way. The temperature at which a compound turns from a solid state to a liquid state is known to be the melting point. On
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Solids: Recrystallization and Melting Points Reference: Chapter 3. Solids: Recrystallization and Melting Points. Read pages 93-94 and 113-117. Experimental procedure‚ pages 118-119. Parts 1-3. Part 1: Melting points of Urea and Cinnamic Acid. Part 2: Melting point of unknown. Part 3: Melting point of Mixture- Urea and Cinnamic Acid (take melting points of mixtures in 1:4‚ 1:1 and 4:1 ratios). Reactions Main Reaction: Not a chemical reaction but a physical reaction. Urea in solid mixed with
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Summary of Results A. Melting point of Benzoic Acid Temperature (¡ÆC) Observation Unmelted White salt First liquid appear point 122 Grainy and shiny white Becoming all liquid 125 Clear B. Melting point of unknown #42 1st trial Temperature (¡ÆC) Observation Unmelted Shiny light yellow crystal First liquid appear point 99 Grainy yellow Becoming all liquid 101 Clear 2nd trial Temperature (¡ÆC) Observation Unmelted Shiny light yellow crystal First liquid appear point 95 Grainy yellow
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ABSTRACT Determining the melting point of a solid organic compound is the easiest way to identify the compound and determine its purity at the same time. For actual samples of compounds‚ the melting will occur over a range of temperatures making the melting points into a melting “range”. The difference between the temperature at which the sample begins to melt and the temperature at which it finishes melting‚ or the magnitude of the melting range‚ is a very important criteria of determining the
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The experimental melting point range of the desired alkene product‚ trans-9-(2-phenylethenyl) anthracene‚ was found to be 132-134 ˚C‚ in comparison to the literature value melting point range of 130-132˚C‚1 it was slightly higher than expected. Overall‚ the experimental melting point range varied from the initial melting point temperature and maximum melting point temperature by 2˚C. As the experimental melting point had a small range of temperature variance and was above that of the literature value
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The Purity and Purification of Solids Melting Point Lab Introduction: The point of this lab was to determine the eutectic point for the naphthalene biphenyl mixture‚ as well as determining the melting point of an unknown substance by comparing it with two known samples. Melting point is a temperature in which a substance changes from solid state to liquid state. Melting points are used to determine whether the given substance is pure or not. Substances that melt sharply‚ less than 1-2°C indicates
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REPORTIntroductionWater is a liquid that freezes and also melts at 32*F (0*C). Melting and freezing points are temperatures when a solid substance turns to a liquid. Liquid is a substance that flows to fit its container.Water Water is a liquid that is odorless‚ colorless‚ and tasteless. Water freezes and melts at 32*F (0*C). As water freezes it expands by one-eleventh. The amount of pressure on the water when it is freezing changes the melting point. Water that reaches 40*F it is at its maximum density. The molecules
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This paper is a full determination for certain chemicals and their boiling points. It lists some already but given the atomic numbers of any material this project includes a conversion and calculation chart to find the freezing point of most any material. GOOD LUCK! Abstract: In this lab we determined the freezing point‚ and Kf‚ of pure 2‚4‚dichloralbenzne as well as a 2‚4‚dichloralbenzne/biphenyl solution. We used this information to determine the molar mass of an unknown (#24) by the 3rd step
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Melting Range Report Name: Date: Lab Section: Selected Known Compounds Name Structural Formula Literature Melting Point Acetanilide C8H9NO 114.3°C Fluorene C13H10 116.5°C Experimental Data Sample Composition 1. 100% Acetanilide 2. 10% Acetanilide 3. 25% Acetanilide 4. 50% Acetanilide Fluorene 5. 75% Acetanilide 6. 90% Acetanilide 7. 100% Fluorene Melting Range 108-116°C 108-112°C 105-112°C 102-109°C 105-112°C 109-115°C 108-114
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