Use the Yield Report Sheet Determine the recovery of acetanilide based on your recorded masses. % Recovery = mass of dry

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Use The Yield Report Sheet Determine The Recovery Of Acetanilide Based On Your Recorded Masses Recovery Mass Of Dry 1 (67.8 KiB) Viewed 36 times

Use The Yield Report Sheet Determine The Recovery Of Acetanilide Based On Your Recorded Masses Recovery Mass Of Dry 2 (67.8 KiB) Viewed 36 times

Use The Yield Report Sheet Determine The Recovery Of Acetanilide Based On Your Recorded Masses Recovery Mass Of Dry 3 (28.66 KiB) Viewed 36 times

Use The Yield Report Sheet Determine The Recovery Of Acetanilide Based On Your Recorded Masses Recovery Mass Of Dry 4 (25.66 KiB) Viewed 36 times

Use The Yield Report Sheet Determine The Recovery Of Acetanilide Based On Your Recorded Masses Recovery Mass Of Dry 5 (74.78 KiB) Viewed 36 times

Use the Yield Report Sheet Determine the recovery of acetanilide based on your recorded masses. % Recovery = mass of dry and purified acetanilide x 100 / mass of original impure acetanilide. We were not able to take melting points and weight during the last experiment, therefore I will provide the data. Assume these: Mass of purified acetanilide: 3.478g Melting Point of purified acetanilide: 110-113 Celsius Melting Point of Pure acetanilide: please look it up in the internet Based on this data: Make a table to show the melting point of the pure acetanilide and your purified acetanilide. Determine the % Error. %Error = difference between both melting points x 100 / melting point of the pure acetanilide. Melting points are ALWAYS displayed as ranges, show ranges in the Table, but for your calculations, you could take an average of the range.

RECRYSTALLIZATION DATA AND RESULTS 5 1 Weight of impure acetanilide gram 34789 gram 11. Weight of purified acetanilide III Melting point of acetanilide 113 - 115 "C Impure acetanilide 300-110 "c Purified acetanilide "C Reported in the literature: % IV Percent recovery of acetanilide grams of purified material % Recovery = X 100 The percentage recovery is calculate by using: grams of crude material

Name: ORGANIC YIELD REPORT SHEET Course and Section: Experiment # and Title: Name of Product: Boiling/Melting Point: Yield in Grams: Appearance of product: Reaction Equation(s) - show line-bond structures and all products: "c Mechanism of Reaction (show complete arrow formalism): Limiting Factor: Theoretical Yield Calculations (all calculations): Percent Yield Calculation (show calculations): Potential reasons of product loss/gain: Post Lab Questions:

PURIFICATION OF ACETANILIDE - EXPERIMENTAL PROCEDURE -CH Acetanilide Transfer 5 grams of impure acetanilide and two boiling chips into in a 250-ml Erlenmeyer flask. Using a beaker on a hot plate or Bunsen burner, start heating -200 mL of distilled water to near its boiling point. Pour -50 mL of hot water to the flask containing the acetanilide. Place the flask on a hot plate swirling occasionally. Keep adding hot solvent and reheating until most of the solids disappears. Some insoluble material will remain visible and appear as suspended solids or oil. It should require about 100 mL of water to dissolve all the acetanilide When the acetanilide has completely dissolved add in small portions, -0.5g of charcoal (or activated carbon or Norite). Meanwhile, prepare a clean 125-mL Erlenmeyer flask with a stemless funnel fitted with fluted filter paper. This will be used for a hot gravity filtration See Figurex Carefully, boil the dark solution for a total of five minutes. Keeping the acetanilide solution boiling, filter it into the Erlenmeyer flask. Some of the acetanilide will crystallize and clog the filter paper. Using a disposible pipet filled with hot solvent or pouring from the Erlenmeyer flask, try to redissolve the solid clogging the funnel. Do not use too much solvent. If the filtered solution appears to contain some of the activated carbon, repeat the procedure one more time. Reheat the now colorless solution containing partially crystallized solid until clear of solid. Remove from the heating and allow the filtrate to cool to room temperature and then chill it further for 10 minutes in an ice-bath to complete the crystallization process Do not disturb the filtrate flask. Eventually, you will see the acetanilide crystals. Meanwhile place a flask filled with distilled water inside a water bath for cooling. In addition, prepare a Buchner funnel for vacuum filtration. Wet the filter paper with a few mL of water and then apply suction Swirling in a circular motion filter the chilled suspension onto the funnel and rinse any remaining crystals from the flask with small portions of ice-cold water. Continue to apply suction until most of the water has been removed. Once all the crystals are inside the Buchner funnel prepare to store, the funnel, inside a beaker big enough to hold it. Using a small piece of paper tower and an rubber band secure your beaker until the next laboratory period. After allowing the crystals to dry, obtain the weight of the purified acetanilide and determine the melting point of the impure and the purified solid. Calculate the percent of pure acetanilide recovered and record your results. -58-