3.0cm³ of redistilled sebacoyl chloride was obtained (density =1.12gcm-3).And dissolved in 50cm³ of dry dichloromethame . 2.2g of diaminohexane was dissolved in 25cm³ of water . 1. Calculate the molar ragione of diamine to acid chloride used 2 .This time using 1.6g of diaminohexane ,calculate the new molar ratio
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- 9.A linear polyester was synthesized from a mixture of diacid and glycol with carboxyl to hydroxyl ratio greater than unity. A sample of the polyester (3.5 g) requires titration with 23 mL of N/50 KOH to reach a phenolphthalein end point. By vapor-pressure osmometry the molecular weight of the polymer was determined to be 12,000. Calculate the average carboxyl functionality of the polymer (that is, average number of carboxyl groups per polymer molecule).The following compounds from the Grignard reaction mixture could be separated by which one of these options: triphenylmethanol and biphenyl Select one: O A They can't be separated O B. Acid -Base Extraction with NAOH (aq) OC Filtration with hexane rinses O D. Acid-Base Extraction with IICI (aq) OE RecrystallizationWhen 0.100 g of an unkown polyhydroxy organic substance was added to 50.0mL of phenol, a decrease of 0.750 C was observed. What is the molecular weight of the polyhydroxy organic compound?
- What is the experimental yield (grams and percentage) Experiment: Oxidation of -Chlorotoluene to o-Chlorobenzoic acid materials used dissolved 3.35 g of KMnO4 1.20 mL of 2-chlorotoluene was added to the mixture 3.0 mL of concentrated hydrochloric acid (pH~2) 10 mL of toluene -The crystals were isolated by vacuum filtration- Product Characterization 1.15 g of the crude product 0.93 g of the final product M.p. (final): 139-141 oCA 5.00-mL aliquot of a solution that contains 3.05 ppm Ni2+ is treated with an appropriate excess of 2,3-quinoxalinedithiol and diluted to 50.0 mL. The molar absorptivity of a Ni2+- 2,3-quinoxalinedithiol solution at 510 nm is 5520 L mol-1 cm-1. What is the absorbance of the above diluted Ni2+- 2,3-quinoxalinedithiol solution at 510 nm in a 1.00-cm cell?What is the percent yield of the hydroboration oxidation of 1-octene to form 1-octanol? Original amount of 1-octene added 840 uL 2 mL of 1M borane THF added For oxidation 1.2mL of 3M NAOH and 1.2 mL of 30% hydrogen peroxide 2 mL of diethyl ether used for extraction 5.11g obtained as final product.
- Complete the roadmap below by providing the correct reagents for each conversion from the list. B. C. D. G H. J. H 1. PCC in pyridine 2. ethanol with catalytic sulfuric acid 3. NBS, hv 4. LDA with propanal 1. PPh3, DMF 5. 2. nbuli 3. 2-propanone 6. NaOH 7. H₂Cr₂07 8. methylpropanoate, NaOCH3 in methanol 9. CH₂CH₂MgBr then aqueous H₂SO4 10. mCPBAWhat is the chemical reaction when completing extraction experiment and using 100mg Benzoic Acid, 2ml H2O and CH2Cl2 each? What is the chemical reaction when completing extraction with 4-chloroaniline and adding in HCl?9-Aminofluorene has applications in the structural analysis of proteins and carbohydrates. Write a stepwise procedure with equations to show how to separate a mixture of 9-aminofluorene and fluorene in diethyl ether solution.
- Melting point range Recrystallized Phenacetin 95-100 Recrystallized Phenacetin + Reference Phenacetin 110-115 Recrystallized Benzil 92-95 Recrystallized Benzil + Reference Benzil 94-98 Questions: 1. What does your melting point say about the purity of your phenacetin sample? Justify your answer using the characteristics of mixed melting point. 2. What does your melting point say about the purity of your phenacetin sample? Justify your answer using the characteristics of melting point. 3. What are two characteristics of a good recrystallization solvent for a given compound? 4. Given a solid sample that contains impurities, how would you determine which solvent to use for a recrystallization? Describe how you would do this in the laboratory. 5. Clearly explain the difference between a recrystallization and a precipitation.The purpose of this experiment is to use both extraction and crystallization techniques to separate a solid mixture of organic compounds. You will receive a packet with 1 g of a unknown (pH is basic) amide solid sample which will contain three components, one from each group: Group 1 (~50% wt): ethyl 4-aminobenzoate, ortho-toluic acid, or benzoic acid Group 2 (~40% wt): fluorene, 1,4-dibromobenzene, benzil, benzoin Group 3 (~10% wt): fluorene, 1,4-dibromobenzene, benzil, benzoin (but not the same as Group 2 compound) Create a lab procedure that will allow you to successfully isolate, purify, and identify the two major (Group 1 and Group 2) components of the unknown amide sample. reagents that can be used are 1M HCl, 6M HCl, 1M NaOH, 6M NaOH, diethyl ether, and methylene chlorideThe two compounds below are dissolved in ether. Explain how you can use extraction to purify 4-hydroxyindole and 1,6- dichloronaphthalene and explain how would you confirm the purity of your isolated compounds? Include all steps for isolation and purification. Make sure to note structural features that lead your method and explain what each step accomplishes. OH CI 4-hydroxyindole 1,6-dichloronaphthalene As you indicate what you would do, you don't need to worry about amounts. However, here are the reagents available to you (you may not need to use every reagent): ЗМ and 6M NaОН(ag) ЗМ and 6M HClaq) 3M NaCl(aq) Brine Dichloromethane NaCl(s) Ca(OH)2(s) Na,SO4(s)