Propose an efficient separation and recovery scheme for a mixture of toluene, benzoic acid, andaniline. Consider that steam distillation is not an option.
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Propose an efficient separation and recovery scheme for a mixture of toluene, benzoic acid, andaniline. Consider that steam distillation is not an option.
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- Propose a method to separate a mixture containing phenol, benzoic acid, naphthalene, and p-nitroaniline. Phenol is soluble in sodium hydroxide solution but insoluble in neutral water or sodium bicarbonate solution. Benzoic acid is soluble in either sodium hydroxide or sodium bicarbonate solutions. Write out the structures of the molecules in your scheme.A 1.5 L of organic compound solution contain 8.0 g of benzoic acid. Methyl tert-butyl ether (MTBE) solvent was used to extract the benzoic acid from the organic compounds into a diluted sodium bicarbonate solution via liquid-liquid extraction (LLE) method. The extracted benzoic acid was transformed into sodium benzoate aqueous solution after LLE. Calculate the total amount of the analyte extracted if the LLE process performed with 1:3 ratio for 3 times, with the recovery of 40% for every step. c)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
- 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.Your colleague is helping you develop the urine test. They suggest that the urine should be adjusted to a pH above 7 before extracting with the organic solvent. Why is this necessary? Support your explanation with a full arrow-pushing mechanism for the reaction that would occur if the pH was below 7. Include all formal charges, intermediates (if applicable) and products.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.Discuss the “green” implications of using dichloromethane (methylene chloride) as your primary extraction solvent. Consider its hazards and toxicities, process for manufacture, cost, efficiency of extraction, ease of recovery and reuse, and cost of waste disposal.
- 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.)Write the balanced chemical equation for the reaction between benzoic acid and sodium hydroxide in aqueous solution. Include physical states.How do you expect the composition of cyclohexane and toluene to change over the course of a distillation?
