If the solubility of a compound A in ether is 30g/100 ml, and the solubility of A in water is 15 g /100 ml. a) If 100 ml of aqueous solution of 3g of A are extracted twice with 100 ml ether. How much A total is extracted? b) How much A would be extracted if only one extraction, but with a volume of 200 ml of ether were extracted? c) What is your conclusion from the amount of A extracted in problems a and b above?

If the solubility of a compound A in ether is 30g/100 ml, and the solubility of A in water is 15 g /100 ml. a) If 100 ml of aqueous solution of 3g of A are extracted twice with 100 ml ether. How much A total is extracted? b) How much A would be extracted if only one extraction, but with a volume of 200 ml of ether were extracted? c) What is your conclusion from the amount of A extracted in problems a and b above?

Macroscale and Microscale Organic Experiments

7th Edition

ISBN:9781305577190

Author:Kenneth L. Williamson, Katherine M. Masters

Publisher:Kenneth L. Williamson, Katherine M. Masters

Chapter7: Extraction

Section: Chapter Questions

Problem 1Q

See similar textbooks

Similar questions

Part 1. One gram of caffeine dissolves in 55 ml of water; 7 ml of dichloromethane (DCM); 530 ml of diethyl ether; and 100 ml of benzene. Covert the solubility of caffeine in these four solvents into units of mg/ml. a) Solubility of caffeine in mg/ml in water: b) Solubility of caffeine in mg/ml in DCM: c) Solubility of caffeine in mg/ml in Diethyl Ether: d) Solubility of caffeine in mg/ml in Benzene: Which is the optimal solvent to extract caffeine from an aqueous solution? Why? Part 1 Continued: Use intermolecular force (IMF), provide a brief explanation on the solubility of caffeine in water, diethyl ether, observed above. (Hint: draw the skeletal structures for caffeine, DCM and diethyl ether)
Table 1. Solubility Tests. Functional Group Observations (specify type if any) Sample in concentrated (+/-) H2SO4 Color orange Hydroxyl group Hydroxyl group Hydroxyl group 1-butanol Color orange 2-butanol Color orange diisopropyl ether Look at the structures of compounds tested for solubility in concentrated H2SO4. What generalization can be made for a substance to be soluble in concentrated H2SO4 ?
A sample is analyzed for Pb. Is the ppm in a dry sample greater than, equal or less than to the ppm, in wet sample?
This question applies to the separation of a solution containing pentanol (MM 88.15 g/mol) and 2,3-dimethyl-2-butanol (MM 102.17 g/mol). Pentanol is the internal standard. Separation of a standard solution containing 213 mg of pentanol and 261 mg of 2,3-dimethyl-2-butanol in 10.0 mL of solution led to a pentanol:2,3-dimethyl-2-butanol relative peak area ratio of 0.895:1.00. Calculate the response factor, F. for 2,3-dimethyl-2-butanol. F = 0.876 Calculate the areas for pentanol and 2,3-dimethyl-2-butanol gas chromatogram peaks in an unknown solution. For pentanol, the peak height is 29.9 mm and the width at half-height is 1.07 mm. For 2,3-dimethyl-2-butanol, the peak height is 38.6 mm and the width at half-height is 4.54 mm. Assume each peak to be a Gaussian. pentanol: 34.13 mm²
Tea leaves were boiled in water and around 1.50 gram of caffeine were extracted by 200.0 mL of water. If three portions of 25.0 mL of dichloromethane were used to extract the caffeine from the aqueous layer, how much caffeine will be extracted by the dichloromethane? Solubility of caffeine in water: 2.18 g per 100 mL waterSolubility of caffeine in dichloromethane: 18.2 g per 100 mL dichloromethane
0.1905 grams of an unknown organic acid containing 2 carboxylic groups was dissolved in about 50 mL of water in a 250 mL Erlenmeyer flask and titrated against 0.1000 M NaOH solution using bromothymol blue indicator. 38.46 mL of titrant was used to achieve end point. Calculate the molar mass of the unknown. Write answer with two decimal places only. No units please.
TOPIC: Recrystallization Students were tasked to conduct a recrystallization experiment to test the ability of the three newly discovered solvents in their laboratory to purify and separate a mixture containing compounds X and Y. The solubilities of the two compounds in g/50 mL of hot and cold solvents are given in the table. Given the data, if a mixture containing 9.0 g each of X and Y is to be recrystallized from 100 milliliters of the solvents, what is the best solvent to use? Support your answer by doing a schematic diagram for EACH solvent.
SOLVE THE PROBLEM, SUBMIT YOUR SOLUTION. Compounds A and B are soluble in water and ether as shown: Solvent Compound A Compound B Water 10 g/mL 1 g/mL Ether 0.5 g/mL 10 g/mL a) Determine the distribution coefficient for compound A. b) Determine the distribution coefficient for compound B. c) How many percent of compound B is removed by three 10-mL portions of ether from 100-ml aqueous solution containing 1 gram of compound B?
Give only typing answer with explanation and conclusion To make a 50 ml 0,05% Tween-20 solution from the stock solution 25% Tween-20. what should be the amount of stock solution you have to use?
1. A 50.00 mL stock CaCl2 solution was diluted with water in a 250.0-mL volumetric flask. A 25.00 mL aliquot of this was further diluted to a final volume of 100.0 mL. Finally, 20.00-mL aliquot of the resulting solution was analyzed and found to contain 0.1500 M CaCh2 Solve for the concentration of the stock solution in M. 2. A 50.00 mL stock CaCl2 solution was diluted with water in a 250.0-mL volumetric flask. A 25.00 mL aliquot of this was further diluted to a final volume of 100.0 mL. Finally, 20.00-mL aliquot of the resulting solution was analyzed and found to contain 0.1200 g CaCl2 Solve for %w/v CaCl2 in the stock solution.
5.35g of salicylic acid added to 7.75mL of methanol followed by 10 drops of sulfuric acid,H2SO4 and the resulting mixture was refluxed for 30 min. If 3.85mL of methyl salicylate were distilled from the mixture. What's the percent yield? Answer to 1 decimal place
What is the dilution factor for Sample 1 if 20 µL of extract is added to 980 µL distilled water?