Preview

Lab Report for Experiment #2: Purification of Acetanilide by Recrystallization

Satisfactory Essays
Open Document
Open Document
400 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Lab Report for Experiment #2: Purification of Acetanilide by Recrystallization
LAB REPORT FOR EXPERIMENT #2: PURIFICATION OF ACETANILIDE BY RECRYSTALLIZATION

Your name TA’s name
Your Partner’s name Lab Section

OBSERVATIONS:

A. SELECTING A RECRYSTALLIZATION SOLVENT
| |Solubility Test (cold) |Solubility Test (hot) |
|Water |insoluble |soluble |
|pet ether |insoluble |insoluble |
|ethanol |fairly soluble |readily soluble |
|acetone |very soluble |readily soluble |

After looking at the solubility of impure acetanilide in the four solvents, water seems to be the best choice as a recrystallizing solvent.

B. DECOLORIZING A SOLUTION OF IMPURE ACETANILIDE AND HOT
FILTRATION
2. 1.5637 grams of impure acetanilide
5. 38 ml total solvent volume
7. Added tip of carbon black to mixture and mixture almost boiled over!
8. 28 ml total solvent volume

C. ISOLATING THE RECRYSTALLIZED PRODUCT WITH VACUUM FILTRATION
2. Chilled crystals in ice bath for 19 minutes. collected flaky white crystals
Mass of watch glass and acetanilide = 22.5478
Mass of watch glass = 21.6903
Mass of recovered acetanilide = 0.8575 g
Mass of impure acetanilide = 1.5637 g
Percent recovered = 54.8 %

D. DETERMINING THE MELTING RANGE
Melting range of recrystallized acetanilide = 112 – 114 oC
Melting range of impure acetanilide = 105 – 111 oC

CONCLUSION:
In this experiment a technique was used that will be used frequently throughout the semester: Purification by recrystallization. This technique allows for the purification of a crude material. The small loss in yield is made up by
Continue Reading
View Writing Issues

You May Also Find These Documents Helpful

  • Satisfactory Essays

    Acetic Acid Lab Report
    • 384 Words
    • 2 Pages

    Acetic Acid Lab Report

    Acetic acid, a pungent smelling colourless liquid having sour taste, used very commonly in the chemistry laboratories. It got its name from Latin word Acetum, which means vinegar. Pure acetic acid is also called glacial acetic acid, because in winters it freezes easily as temperature goes below 16-17°C. Therefore it looks like as if a small glacier is there in the bottle, hence called glacial acetic acid.…

    • 384 Words
    • 2 Pages
    Satisfactory Essays
    Read More
  • Powerful Essays

    Separation of a Mixture of Solids
    • 618 Words
    • 3 Pages

    Separation of a Mixture of Solids

    The purpose of this experiment was to learn how to separate a mixture of solids.…

    • 618 Words
    • 3 Pages
    Powerful Essays
    Read More
  • Good Essays

    A Separation and Purification Scheme
    • 1426 Words
    • 6 Pages

    A Separation and Purification Scheme

    Experiment 55 consists of devising a separation and purification scheme for a three component mixture. The overall objective is to isolate in pure form two of the three compounds. This was done using extraction, solubility, crystallization and vacuum filtration. The experiment was carried out two times, both of which were successful.…

    • 1426 Words
    • 6 Pages
    Good Essays
    Read More
  • Powerful Essays

    Simple Distillation, Gas Chromatography: Preparation of Synthetic Banana Oil
    • 2194 Words
    • 9 Pages

    Simple Distillation, Gas Chromatography: Preparation of Synthetic Banana Oil

    My hypothesis for this experiment was twofold. As far as the experiment and procedures itself, I was a little concerned for how well my yield would turn out. Heating under reflux as well as the new piece of distillation…

    • 2194 Words
    • 9 Pages
    Powerful Essays
    Read More
  • Powerful Essays

    Separation of a Mixture of Solids
    • 1522 Words
    • 7 Pages

    Separation of a Mixture of Solids

    The purpose of this experiment is to become familiar with the separation of mixtures of solid and learn separation techniques based on the chemical properties of a substance.…

    • 1522 Words
    • 7 Pages
    Powerful Essays
    Read More
  • Satisfactory Essays

    Extraction of Caffeine from Tea
    • 288 Words
    • 2 Pages

    Extraction of Caffeine from Tea

    Experiment could be made greener by implementing a method which can generate less amount of waste and give high yield of the desired sample.…

    • 288 Words
    • 2 Pages
    Satisfactory Essays
    Read More
  • Better Essays

    Williamson Ether Synthesis of Phenacetin
    • 994 Words
    • 4 Pages

    Williamson Ether Synthesis of Phenacetin

    Mass of recrystallized phenacetin product = Crystals + watch glass mass - Pre-weighed watch glass mass…

    • 994 Words
    • 4 Pages
    Better Essays
    Read More
  • Better Essays

    Isopentyl Acetate
    • 1448 Words
    • 6 Pages

    Isopentyl Acetate

    Techniques and equipment used throughout the experiment include a reflux apparatus, separatory funnel for isolation, vacuum filtration, and simple distillation. The reflux condenser is used to allow thorough distillation of the product with the use of heat to accelerate and stir while vapors fall back into the round bottom flask. Isolation of product is used with the help of the separatory funnel and vacuum filtration. Simple distillation is used to purify product and IR spectroscopy helps compare and test validity of our final product.…

    • 1448 Words
    • 6 Pages
    Better Essays
    Read More
  • Better Essays

    Mixture Analysis Lab
    • 1046 Words
    • 5 Pages

    Mixture Analysis Lab

    The initial mass of unknown # 12-Green was recorded. The first substance separated from the mixture was iron based on its unique magnetic property. A magnet was used to extract the iron from unknown # 12-Green and the mass of the iron fillings was recorded. The next substance separated from the mixture was ammonium chloride based on its unique ability to sublimate. Unknown # 12-Green was heated with a Bunsen burner in a fume hood (note the special precaution) until the ammonium chloride was entirely extracted. The mass of the mixture was obtained to determine the amount of ammonium chloride lost due to sublimation and the mass of ammonium chloride in the mixture was recorded. Next, the extraction separation technique was used to separate the two remaining substances, silicon dioxide and sodium chloride. Extraction is used to remove a substance with a greater solubility from a substance with a lower solubility. In this case, silicon dioxide is not soluble in water while sodium chloride is. Therefore, approximately 20mL of deionized water was added to the mixture. The mixture was stirred until the sodium chloride was dissolved and the silicon dioxide had settled to the bottom of the dish. The filtration separation technique was used to separate the silicon dioxide from the sodium chloride suspended in water. The silicon dioxide collected in the filter paper was placed in the oven until it was…

    • 1046 Words
    • 5 Pages
    Better Essays
    Read More
  • Good Essays

    Recrystallization of Pure Phthalic Acid, Benzoic Acid and Napthalene
    • 415 Words
    • 2 Pages

    Recrystallization of Pure Phthalic Acid, Benzoic Acid and Napthalene

    Recrystallization is a important method in purifying organic compounds which are solid. It is an effective method that is important to be familiar with that is essential in the industrial chemical world. This experiment will allow students to be familiarized with the technique of recrystallization by working with phtalic acid, benzoic acid and naphthalene from appropriate organic solvents.…

    • 415 Words
    • 2 Pages
    Good Essays
    Read More
  • Good Essays

    Systhesis of Dulcin
    • 620 Words
    • 3 Pages

    Systhesis of Dulcin

    The main objective of this lab is to gain experience at a typical synthesis and semi-microscale recrystallization.…

    • 620 Words
    • 3 Pages
    Good Essays
    Read More
  • Good Essays

    Steam Distillation Of Eugenol
    • 752 Words
    • 4 Pages

    Steam Distillation Of Eugenol

    A mixture of 25 ml distillate and 10 ml CH2Cl2 was placed into a separatory funnel. This mixture was extracted and 15 ml of extract was collected. In the same separatory funnel 10 ml of CH2Cl2 was added, extracted and collected. Another third extraction with 10 ml of CH2Cl2 was performed and collected. These 3 extracts were combined to give the total crude product.…

    • 752 Words
    • 4 Pages
    Good Essays
    Read More
  • Satisfactory Essays

    Lab 3: Bromination Of Acetanilide
    • 368 Words
    • 2 Pages

    Lab 3: Bromination Of Acetanilide

    To find the limiting reagent we need to find the number of moles of acetanilide, and the number of moles of Bromine.…

    • 368 Words
    • 2 Pages
    Satisfactory Essays
    Read More
  • Satisfactory Essays

    Chem Lab Mixture of Solutions
    • 522 Words
    • 3 Pages

    Chem Lab Mixture of Solutions

    Purpose: This experiment is designed to show the different ways to separate solid mixtures into individual elements. It will also determine whether a substance can be considered “pure” or not, as well as determining the solubility of each mixture in water.…

    • 522 Words
    • 3 Pages
    Satisfactory Essays
    Read More
  • Good Essays

    Labpaq Exp 6
    • 730 Words
    • 3 Pages

    Labpaq Exp 6

    Procedure: Filled each test tube with substances provided and subjected them to various conditions. These conditions included, heat, cold water, hot water, acid and basic additions and tested on litmus paper. The reactions were observed and documented at each step.…

    • 730 Words
    • 3 Pages
    Good Essays
    Read More

Related Topics