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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- 0.750 g of crude acetylsalicylic acid is recrystallized using ethanol as the solvent. The solubility of acetylsalicylic acid in ethanol at 78 oC is 15.45 g per 100 mL. a) How much hot ethanol is needed to dissolve the 0.750 g of acetylsalicylic acid? b) If the solubility of acetylsalicylic acid at 25 oC is 0.100 g per 100 mL, how much acetylsalicylic acid will be obtained after crystallization in ethanol at 25 oC? Use the volume from part A. c) What is the maximum percent recovery for this re-crystallizationTable 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 ?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
- MODIFIED TRUE OR FALSE Write the correct word to make the statement true if it's false 1. The formation of black smoke upon combustion of hydrocarbons indicates incomplete combustion which means that the sample has a [low] C to H ratio. 2. In steam distillation, the desired substance decomposes and is obtained at a temperature [higher] than its actual boiling point.Chemistry Which lab technique(s) can be performed on solid, somewhat soluble samples? Melting Range Determination or Recrystallization. Melting Range Determination. Not Recrystallization. Neither Recrystallization nor Melting Range Determination. Recrystallization. Not Melting Range Determination.Look up the structures and melting points for acetanilide and salicylic acid.Predict whether the rate of cooling during a recrystallization process will have any effect on thepurity of the crystals formed.
- Based on the informaton presented below, answer the following questions. An ether solution contains the following components. 2,3,4,5-tetramethylbenzene benzyl alcohol 2-hydroxybenzoic acid This solution is extracted with a 1.0 M solution of NaOH, that is immiscible with ether. The 2-hydroxybenzoic acid will be recovered from the layer.Which of the following would be effective in separating iso-butanol and cyclopentane? iso-Butanol boiling point: 108 °C Cyclopentane boiling point: 49.2 °C both simple and fractional distillation fractional distillation simple distillation none of the above4. CH₂ -NH, Circle the pairs of organic solids which can be separated from each other by solvent extraction using 2M HCI.* CH₂ CH H.C-C-CH-C-CH CH CH H3C- H.C acid + acid → no reaction base + base → no reaction CH₂ -CH₂ -COOH -COOH CH HC-С-СООН CH₂ сну CH H₂C-C-COOH CH -COOH H.C. H.C- b09) 0) YBW 2 CH₂ ht of -сҢ CH3 H.C-С-соон сна ондул -NH₂ 75 0 986 CH CH -COOH -NH₂
- Which of these is NOT true of a good recrystallization solvent? Which of these is NOT true of a good recrystallization solvent? a) The compound is insoluble in the solvent when it is cold. b) The solvent boiling temperature is at least 40 °C. c) The solvent has many impurities. d) The compound is soluble in the solvent when it is hot.You were given a mixture of two miscible solvent A and B that you are tasked to separate. You know that solvent A has a boiling point of 49 oC while solvent B has a boiling point of 174 oC. Which of the listed method would overall be the most efficient? Fractional distillation Recrystallization Solid-liquid extraction Liquid-liquid extraction Simple distillation Acid-Base extractionHow can we obtain the boiling point using table 1 and table 2? And how can we identify the compound using the obtained boiling point? Show formula, solution, and explanation.