EBK EXPERIMENTAL ORGANIC CHEMISTRY: A M
6th Edition
ISBN: 9781305687875
Author: Gilbert
Publisher: CENGAGE LEARNING - CONSIGNMENT
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Question
Chapter 3.2, Problem 28E
Interpretation Introduction
Interpretation:Whether some loss of sample mass is expected to occur or not after careful execution of recrystallization should be explained.
Concept introduction:Recrystallization is technique that is used for purification of organic compounds. This process includes dissolution of solid in specific solvent at high temperature and then crystals are made again by process of cooling. Temperature of crystals is decreased to allow impurities to remain in solution only.
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Chapter 3 Solutions
EBK EXPERIMENTAL ORGANIC CHEMISTRY: A M
Ch. 3.2 - Prob. 1ECh. 3.2 - Prob. 2ECh. 3.2 - Prob. 3ECh. 3.2 - Prob. 4ECh. 3.2 - Prob. 5ECh. 3.2 - Prob. 6ECh. 3.2 - Prob. 7ECh. 3.2 - Prob. 8ECh. 3.2 - Prob. 9ECh. 3.2 - Prob. 10E
Ch. 3.2 - Prob. 11ECh. 3.2 - Prob. 12ECh. 3.2 - Prob. 13ECh. 3.2 - Prob. 14ECh. 3.2 - Prob. 15ECh. 3.2 - Prob. 16ECh. 3.2 - Prob. 17ECh. 3.2 - Prob. 18ECh. 3.2 - Prob. 19ECh. 3.2 - Prob. 20ECh. 3.2 - Prob. 21ECh. 3.2 - Prob. 22ECh. 3.2 - Prob. 23ECh. 3.2 - Prob. 24ECh. 3.2 - Prob. 25ECh. 3.2 - Prob. 26ECh. 3.2 - Prob. 27ECh. 3.2 - Prob. 28ECh. 3.2 - Prob. 29ECh. 3.2 - Prob. 30ECh. 3.2 - Prob. 31ECh. 3.2 - Prob. 32ECh. 3.2 - Prob. 34ECh. 3.3 - Prob. 1ECh. 3.3 - Prob. 2ECh. 3.3 - Prob. 3ECh. 3.3 - Prob. 4ECh. 3.3 - Prob. 5ECh. 3.3 - Prob. 6ECh. 3.3 - Prob. 7ECh. 3.3 - Prob. 8ECh. 3.3 - Prob. 10ECh. 3.3 - Prob. 11ECh. 3.3 - Prob. 12ECh. 3.3 - Prob. 13ECh. 3.3 - Prob. 14ECh. 3.3 - Prob. 15ECh. 3.3 - Prob. 16ECh. 3.3 - Prob. 17ECh. 3.3 - Prob. 18ECh. 3.3 - Prob. 19ECh. 3.3 - Prob. 21ECh. 3.3 - Prob. 22ECh. 3.3 - Prob. 23ECh. 3.3 - Prob. 24ECh. 3.3 - Prob. 25ECh. 3.3 - Prob. 26E
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- Why is it important to cool slowly during recrystallizationarrow_forwardAre Particles Visible? Can it be Filtered? Do Partices Settie? See Tyndal Effect? Example Mixture Solution No saltwater Colloid No Suspension Yes Part 3 Separating Mixtures 15. Since the parts of a moture are combined, they can be separated rather easily. 16. F in the table below to sutmarize the 6 different separation techniques described. Technique Description Separates larger solids from smaller solids by passing them through mesh. Separates magnetic from non-magnetic materials Separates an insolluble solid from a liquid by passing it through a filter. Separates a soluble sold from a liquid by boling off the liquid. Separates a liquid from a soluble solid in solution by boiling and cooling it. Separates mitures of liquids with different boiling points using a condenser. Separates matures of liquids with afferent solubilities using absorbent paper. Part 4 Properties.of Matter 17. Matter can be described by 2 types of properties: and properties 18. A) s a property of matter one can…arrow_forwardWhich of the following statements is true when considering temperature during a recrystallization? More than one answer may be correct. Using ice to cool the sample will speed up the crystallization process so that large crystals will be formed. It is important that the sample is dissolved in just enough hot solvent. O Ideally the hot solvent used will keep the impurities dissolved OR not dissolve them at all. Enough cold solvent should be added to dissolve the sample BEFORE heating it past its boiling point.arrow_forward
- 4.Discussed the Purposed of the Golden rules in the practice of Forensic Chrmistry.arrow_forwardBriefly explain how slow cooling contributes to the formation of pure crystals during recrystallization.arrow_forwardIndicate which of the two filtration techniques, gravity ( G ) or vacuum ( V ), is suitable for each of the following operations. a) Hot filtration b) Removal of decolourising carbon c) Isolation of recrystallized solute from solution.arrow_forward
- You are attempting to purify a compound via recrystallization. You prepare the process through the following method: 1) Dissolve the material in a minimal amount of hot EtOH. 2) Slowly add hot water until the compound is slightly cloudy. 3) Add a small amount of EtOH until the solution is just clear (still hot). 4) Cool to RT. Upon cooling to RT you notice that the compound is not precipitating out of solution. You decide to boil off some ethanol. Upon completing this step and cooling to RT you notice that the compound is precipitating out as desired! In which solvent is your compound the least soluble? Ethanol O Water O The ethanol water mixture Insoluble in all of these solventsarrow_forwardIs recrystallization a good method for purifying any product?arrow_forward2. When performing the recrystallization of an impure solid, why is it advised to use the minimal amount of solvent possible? Group of answer choices To minimize the amount of pure solid lost due to its solubility. To minimize the cost of the recrystallization. To reduce the time needed to filter the pure solid from the solvent after recrystallization. To minimize the amount of hazardous materials used.arrow_forward
- The goal of recrystallization is to obtain the maximum amount of pure material. Explain what effect each of the following mistakes would have on the success of a recrystallization. NOTE: Write complete sentences when answering the questions! Don't just answer "increase" or "decrease"! Provide an explanation to justify your answer! а. Too much solvent was used. What is the effect on the amount of recrystallized material? b. Too little solvent was used. What is the effect on the purity of the recrystallized material?arrow_forwardA student wants to determine how different factors affect the rate of dissolving a solid in water. The student will test: the size of the particles, the temperature of the water and the amount of agitation or stirring. Investigation Particle size Temperature (°C) Stirring 1 medium 40 no 2 Extra large 40 yes 3 medium 40 yes Which investigation will have the highest rate of dissolving and why? Use evidence to explain your answer. Format BI U ...arrow_forwardContrast the physical appearance of the crude material before the recrystallization and that of the material isolated after recrystallization.arrow_forward
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