EBK EXPERIMENTAL ORGANIC CHEMISTRY: A M
6th Edition
ISBN: 9781305687875
Author: Gilbert
Publisher: CENGAGE LEARNING - CONSIGNMENT
expand_more
expand_more
format_list_bulleted
Question
Chapter 5.4, Problem 10E
Interpretation Introduction
Interpretation: The extraction of trimyristin and tripalmitin from the plant material needs to be explained.
Concept Introduction :
Extraction is defined as a method used to isolate a substance which is mixed with some other substance. It is done by adding a solvent in which one the substance which needs to be extracted is soluble and other substance is insoluble.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
You are employed as a coop student at the Drug and Alcohol Testing Association of Canada (DATAC) developing analytical tests for sports doping agents. You are asked to prepare a procedure for the extraction of methylphenidate, the active compound in Ritalin, from urine samples (consider them as simple aqueous layers, you do not need to consider other components!). The goal of the procedure is to extract the methylphenidate into an organic layer which will then be evaporated, and the residue will be tested for the drug.You find that methylphenidate is highly soluble in 2-methyltetrahydrofuran, a bio-renewable solvent. Draw the structure of 2-methyltetrahydrofuran and give two reasons why it is a good solvent choice for liquid-liquid extraction.
2.1g of sample are dissolved in methylene chloride and the sample is extracted with an aqueous solution of acid and base. Three compounds are isolated - 0.7g of ethyl p-aminobenzoate, 0.6 g of acetanilide, and 0.5 g of benzoic acid. Calculate the % composition of ethyl p-aminobenzoate in the recovered mixture. (Round the answer to 1 significant figure. Give just the number, not a % sign.)
The boiling points for the compounds are 118 °C and 35 °C respectively. The
solubility for both compounds is the same (8g/100g water). Explain this
observation for (i) boiling point disparity; (ii) solubility similarity
H-bonds form in diethyl ether; n-butyl alcohol forms H-bonds in water
H-bonds form in n-butyl alcohol; diethyl ether forms H-bonds in water
H-bonds in n-butyl alcohol; Both compounds form H-bonds in water
O Both compounds form H-bonds; Both compounds form H-bonds in water
Chapter 5 Solutions
EBK EXPERIMENTAL ORGANIC CHEMISTRY: A M
Ch. 5.3 - Prob. 1ECh. 5.3 - Prob. 2ECh. 5.3 - Prob. 3ECh. 5.3 - Prob. 4ECh. 5.3 - Prob. 5ECh. 5.3 - Prob. 6ECh. 5.3 - Prob. 7ECh. 5.3 - Prob. 8ECh. 5.3 - Prob. 9ECh. 5.3 - Prob. 10E
Ch. 5.3 - Prob. 11ECh. 5.3 - Prob. 12ECh. 5.3 - Prob. 13ECh. 5.3 - Prob. 14ECh. 5.3 - Prob. 15ECh. 5.3 - Prob. 16ECh. 5.3 - Prob. 17ECh. 5.3 - Prob. 18ECh. 5.3 - Prob. 19ECh. 5.3 - Prob. 20ECh. 5.3 - Prob. 21ECh. 5.3 - Prob. 22ECh. 5.4 - Prob. 1ECh. 5.4 - Prob. 2ECh. 5.4 - Prob. 3ECh. 5.4 - Prob. 4ECh. 5.4 - Prob. 5ECh. 5.4 - Prob. 6ECh. 5.4 - Prob. 7ECh. 5.4 - Prob. 8ECh. 5.4 - Prob. 9ECh. 5.4 - Prob. 10ECh. 5.4 - Prob. 11ECh. 5.4 - Prob. 12E
Knowledge Booster
Similar questions
- Isopropanol is a good extraction solvent for plant pigments as it breaks down cell walls and is miscible with pigments. Can you be sure that you only extracted chlorophyll-a from your spinach leaf? If not, what else might have been extracted?arrow_forward(b) A researcher wishes to obtain a glycoside (an organic compound) from an aqueous plant extract using the solvent extraction technique. She therefore performs the following steps: Step 1: An aqueous solution (100 mL) containing 7 g of the glycoside was shaken with 50 mL of ethyl acetate. Step 2: The resulting aqueous layer from Step 1 was further shaken with 50 mL of dichloromethane. Given that: Kp for the glycoside in ethyl acetate-water = 0.8 Kp for the glycoside in dichloromethane-water = 0.9 (i) Calculate the total mass of glycoside extracted. (ii) If the molar mass of the glycoside = 784.3 g/mol, calculate the molar concentration of the glycoside remaining in the aqueous layer after each extraction.arrow_forwardYour employer hands you a heterogeneous mixture and asks you to isolate all of thehexane that you can from it. After some analysis, you determine that the mixture contains toluene, hexane,benzoic acid, water, sodium chloride, and sand. Explain how you would isolate pure hexane from thismixture. Remember that you can use techniques such as filtration, extractions, and acid/base chemistrythat we learned earlier in this course in addition to distillation. You may need to look up solubilities and/orboiling points online to solve this problem. You only need to isolate the hexane?arrow_forward
- 10. For each of the following mixtures, suggest a separation technique and explain a basis for your choice: (a) Acetone (a volatile liquid) and benzaldehyde (b) N-Ethylpentanamine, butanamide and phenol. Explain.arrow_forwardConsider a ternary (three-component) system of amphiphile, hydrocarbon, and water. What structure do you expect to form if small amounts of the first two components are mixed with a large amount of water?arrow_forwardWhat is the difference in the solubility of benzoic acid and sodium benzoate in water and explain which of them will be more soluble in chloroform.arrow_forward
- An organic chemistry laboratory Extraction; the extraction of crude naphtalene- benzoic acid mixture. Naphthalene is a suspect carcinogen and is toxic to aquatic life. Find an alternative pair of molecules that adhere better to the principles of green chemistry and can be separated by extraction using green' solvents. (kindly answer fully)arrow_forward9. Phosphotyrosine (shown below) has four ionizable functional groups (pK1 = 2.5, pKR1 = 2.1, pKr2 = 7.2, pK2 = 9.5). (a) Write the equilibrium equation for its four ionization forms and assign the proper pka for each ionization. DRAW the structure of phosphotyrosine in each ionization state. What is the net charge on the phosphotyrosine molecule in each ionization state? *H3N. pk2 - 9.5 .COOH pK, - 2.5 O=P-OH pKRI - 2.1 ÖH pKRI - 7.2 (b) Draw the titration curve of phosphorotyrosine and indicate each pKa and the isoelectric point (pl), indicate the molar equivalents of OH on the x-axis.arrow_forwardA student prepares ethyl benzoate by the reaction of benzoic acid with ethanol using a sulfuric acid catalyst. The following compounds are found in the crude reaction mixture: ethyl benzoate (major component), benzoic acid, ethanol, and sulfuric acid. Using a handbook, obtain the solubility properties in water for each of these compounds. Indicate how you would remove benzoic acid, ethanol, and sulfuric acid from ethyl benzoate. At some point in the purication, you should also use an aqueous sodium bicarbonate solution. Outline your procedure using a flowchart.arrow_forward
- A mixture of p-nitrophenol and o-nitrophenol can be separated by steam distillation. The o-nitrophenol is steam volatile, and the para isomer is not volatile. Explain. Base your answer on the ability of the isomers to form hydrogen bonds internally.arrow_forwardNaphthalene, C10H8 is insoluble in water but sublimes easily when heated. How could you separate a mixture of naphthalene and NaCl? Suggest two different methods. asaparrow_forwardGive the advantages of using steam distillation in the recovery of an organic liquid from a mixture.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Macroscale and Microscale Organic ExperimentsChemistryISBN:9781305577190Author:Kenneth L. Williamson, Katherine M. MastersPublisher:Brooks Cole
Macroscale and Microscale Organic Experiments
Chemistry
ISBN:9781305577190
Author:Kenneth L. Williamson, Katherine M. Masters
Publisher:Brooks Cole