0.280 g of impure acetylsalicylic acid is recrystallized from a suitable solvent. The mass of the recrystallized product is 0.139 g and the melting point is 121.6–122.9 °C. Calculate the percent recovery of the acetylsalicylic acid to 1 decimal place.
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0.280 g of impure acetylsalicylic acid is recrystallized from a suitable solvent. The mass of the recrystallized product is 0.139 g and the melting point is 121.6–122.9 °C. Calculate the percent recovery of the acetylsalicylic acid to 1 decimal place.
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- 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 ?b) Will the sample be contaminated with any of the impurities? Calculate the percent purity of the initial sample (in terms of compound A) - ( i.e. express the amount of compound A in the initial sample as a percentage of the mass of initial sample). Calculate the percent purity of the final sample (in terms of compound A) - (i.e. express the amount of compound A in the final sample as a percentage of the mass of final sample). Did the recrystallization procedure result in an increase of the percent purity of compound A in the sample? Comment on the results.Calculate the vapor pressure (in mmHg) above of solution containing 50.0 g of ethylbromide (CH3CH2Br) and 29.484 g of 1,2-ethanediamine (NH2CH2CH2NH2) at 21.0oC. The vapor pressure of ethyl bromide at 21.0oC is 400 mmHg. The vapor pressure of 1,2-ethanediamine at 21.0oC is 10.0 mmHg. Your answer should have 3 significant figures.
- The mixture contains benzoic acid, 2-napthol, and naphthalene. Dissolve the mixture in the polar solvent ether. When you react the mixture with 10% NaHCO3(sodium bicarbonatea weak base in aqueous solution) reacts with benzoic acid and forms sodium benzoate an ionic compound (similar to NaCl) that dissolves in aqueous solution (heavier than ether in density) and goes to the bottom of the centrifuge tube or to the bottom of the separatory funnel forming two layers. Then remove the bottom aqueous layer and collect in a beaker labeled as bicarbonate extract. Acidify the bicarbonate extract in the beaker to give benzoic acid. The top ethereal layer contains in the centrifuge tube or separatory funnel 2-napthol and naphthalene. To this top layer add 10% NaOH (sodium hydroxideis a strong base in aqueous solution reacts with only 2-napthol, a weak acid forming 2-napthoxide an ionic compound soluble in aqueous solution (similar to NaCl) that goes to the bottom of the centrifuge tube or to…2. An impure sample of compound D is contaminated with a number of impurities. The sample is to be purified by recrystallization. The solubility properties of three potential solvents are summarized below. Choose the best solvent and explain your answer. Include comments on each of the three solvents. Solubility of D at the boiling point Solubility of D at - 0°C of the solvent Solvent X 0.08g/mL 0.06 g/mL Solvent Y 0.67 g/mL 0.59 g/mL Solvent Z 0.63 g/mL 0.12 g/mLhi! please be as specific as possible in your explanation, thank you!
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- Hg(OAc)2, H20 -CH3 NABH4 Hg(OAc)2, H20 NABH4 BH3 H202 CH3 THE OH" PHCO3H CH2CI2 (solvent) Cl2A saturated solution: will rapidly precipitate if a seed crystal is added. contains no double bonds. contains dissolved solute in equilibrium with undissolved solid. contains as much solvent as it can hold.Please provide only typed answer solution no handwritten solution allowed