Preview

To Determination the Partition Coefficient of Ethanoic Acid Between Water and Butan-2-Ol.

Good Essays
Open Document
Open Document
635 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
To Determination the Partition Coefficient of Ethanoic Acid Between Water and Butan-2-Ol.
Experiment18

Aim

To determination the partition coefficient of ethanoic acid between water and butan-2-ol.

Procedure

1. The room temperature was recorded. 2. 15cm3 of the given aqueous ethanoic acid and 15cm3 of butan-2-ol were poured into a 100cm3 separating funnel, using suitable apparatus. The funnel was stoppered and was shook vigorously for 1 to 2 minutes. (The pressure in the funnel was released by occasionally opening the tap.) 3. 10cm3 of each layer was separated approximately. (The fraction near the junction of the two layers was discarded.) 4. 10.0cm3 of the aqueous layer was pipetted into a conical flask and was titrated with 0.1 M sodium hydroxide solution using phenolphthalein. 5. Using another pipette, 10.0 cm3 of the alcohol layer was delivered into a conical flask and was titrated with 0.1 M sodium hydroxide solution. 6. Steps (2) to (5) was repeated with another separating funnel using the following volume: 25cm3 of aqueous ethanoic acid and 15cm3 of butan-2-ol 7. For each experiment, the ratio of the concentration of ethanoic acid in the aqueous layer to that in the butan-2-ol layer was calculated.

Result

Room temperature: 29℃ Volume of butan-2-ol: 15 cm3

|Volume of 0.2M ethanoic acid / |Volume of 0.1M NaOH titre for |Volume of 0.1M NaOH titre for|Partition coefficient |
|cm3 |aqueous layer / cm3 |alcohol layer / cm3 |K= |
|15 |10.00 |12.55 |0.796 |
|25 |12.10 |15.60 |0.776 |

Conclusion

The partition coefficient of ethanoic acid between water and butan-2-ol is : = =0.786

Discussion

1. Shaking is necessary in step (2) because it made it faster
Continue Reading
View Writing Issues

You May Also Find These Documents Helpful

  • Satisfactory Essays

    6.03 Calorimetry Lab Report
    • 255 Words
    • 2 Pages

    6.03 Calorimetry Lab Report

    4. Transfer about 20 mL (+0.02 mL) of the HCl to the flask from the acid buret located on the reagent bench. Record the molarity of the HCl and the initial and final volume readings from the buret (+0.02 mL).…

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

    Diprotic Acid Lab Report
    • 1283 Words
    • 6 Pages

    Diprotic Acid Lab Report

    The equation, C1 x V1 = C2 x V2 was used in the experiment to find the volume of food acid. This equation was used because the food acid was being diluted. The volume of food acid was found to be 0.2L.…

    • 1283 Words
    • 6 Pages
    Powerful Essays
    Read More
  • Powerful Essays

    T Pentyl Chloride Lab Report
    • 1041 Words
    • 5 Pages

    T Pentyl Chloride Lab Report

    Using 22 mL of t-Pentyl alcohol and 50 mL of 37.3% concentrated HCl, a mixture was created and swirled in a 125 mL separatory funnel. After the solution had been mixed for…

    • 1041 Words
    • 5 Pages
    Powerful Essays
    Read More
  • Good Essays

    Investigations of Buffers
    • 991 Words
    • 4 Pages

    Investigations of Buffers

    The purpose of this experiment was to get an understanding as to how to properly prepare chemical buffers. Also part of this experiment was to gauge the effectiveness of the buffers by measuring their pH levels in various titration solutions, using a pH meter.…

    • 991 Words
    • 4 Pages
    Good Essays
    Read More
  • Good Essays

    Competing Nucleophiles Lab
    • 2607 Words
    • 11 Pages

    Competing Nucleophiles Lab

    40 g of ice and approximately 30 ml of sulfuric acid is cautiously added to a 100 mL beaker respectively. Weigh 7.6 g of ammonium chloride and 14.0 g of ammonium bromide and place it in another beaker, crushing the lumps until a powdery mixture remains. The powdery mixture is then transferred to a 125 mL Erlenmeyer flask. Add the ammonium salts into the sulfuric acid mixture. Heat is applied to dissolve the salt. Once the solution has fully dissolved, allow it to cool until the warm substance is touchable. A prolonged waiting period can cause the solution to recrystallize and this process would have to be repeated again. Place 6.0 mL of water in a 15 mL centrifuge tube marking the tube at the 6.0 mL level and replace the water with the solvent-nucleophile mixture. The tube is set aside for the t-butyl experiment. The remaining mixture is placed in a 25 mL round bottom flask.…

    • 2607 Words
    • 11 Pages
    Good Essays
    Read More
  • Powerful Essays

    Aspirin Sample
    • 1996 Words
    • 8 Pages

    Aspirin Sample

    Goggles were obtained and put on before entering the lab area. 2.0 grams of salicylic acid should be measured and placed into a 125 mL Erlenmeyer flask. 5.0 mL of acetic anhydride and 5 drops of 85% phosphoric acid was added to the Erlenmeyer flask. Drops of distilled water were added to rinse down bits of solids that were on inner wall of the flask. Mixture was heated on the hot plate for fifth-teen minutes, at 75 degrees Celsius. Two mL of distilled water was added 10 minutes into heating. Buchner funnel and filter were set up for the filtration…

    • 1996 Words
    • 8 Pages
    Powerful Essays
    Read More
  • Powerful Essays

    Competitive Nucleophiles
    • 628 Words
    • 3 Pages

    Competitive Nucleophiles

    To begin the experiment, we assembled a reflux apparatus in the fume hood with a 100 mL round bottom flask and a condenser. Next we added 44 mL of sulfuric acid to a 125 mL Erlenmeyer flask. We also measured 4.75g ammonium chloride and 8.75g ammonium bromide into a 125 mL beaker, crushed the lumps, and placed in a 250 mL Erlenmeyer flask along with the sulfuric acid. We used heat to help the solutes dissolve. When they had dissolved, we allowed the flask to cool and then poured 17 mL of the solution into a separatory funnel and the rest of the solution into the reflux apparatus. 2.5 mL of 1-butanol was added to the reflux apparatus along with a boiling stone. We then started the circulation of water and brought the mixture to a gentle boil for 75 minutes. After that time we allowed it to cool in an ice bath. We then transferred the solution to a 125 mL separatory funnel and allowed the phases to separate. The lower layer was drained and the halide solution was decanted into a ground-glass stoppered flask. We then analyzed the sample using refractometry.…

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

    Limiting Reactant Lab
    • 1092 Words
    • 5 Pages

    Limiting Reactant Lab

    25 mL of sodium iodate solution was added to each flask. Using 10 mL and 25 mL graduated cylinders, the following volumes of CaCl2 solution with a concentration of 22 g/L was added to the Erlenmeyer flasks. In flask 1, 5 mL of CaCl2 solution was added. In flask 2, 15 mL of CaCl2 solution was added. In flask 3, 25 mL of CaCl2 solution was added. In flask 4, 35mL of CaCl2 solution was added. In flask 5, 40mL of CaCl2 was added. The mixture was stirred into each flask. The observations about the reaction in each flask was recorded in the Results and Analysis section. The filtration process was the same for each product. First, the suction filtration apparatus was set up. Using a Buchner funnel, the funnel was fit in a filter flask, which is an Erlenmeyer flask with a second opening off the side of its neck. The second opening was attached to an aspirator, which provided the vacuum. A circular piece of filter paper was placed over the holes in the bottom of the Buchner funnel. A heavy rubber tube was connected to the side arm opening on the filter flask. Then, the tube was attached to a special side opening on a water…

    • 1092 Words
    • 5 Pages
    Good Essays
    Read More
  • Good Essays

    Observation Of Chemical Changes Lab Report
    • 557 Words
    • 3 Pages

    Observation Of Chemical Changes Lab Report

    Procedure: Using a 96 well plate and a pipette each chemical was placed into its individual well, two drops of a second chemical were added and the observations of the reaction/changes were recorded. The new mixture was viewed on a light and on a dark background to observe all changes.…

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

    Nmbj
    • 615 Words
    • 3 Pages

    Nmbj

    | |9/2 Lab |Exp. 2 Paper Chromatography |Exp. 1 Advanced study assignment (ASA1) |Quiz 1, ASA2 |…

    • 615 Words
    • 3 Pages
    Powerful Essays
    Read More
  • Satisfactory Essays

    Lab 8 Isopentyl acetate 1
    • 599 Words
    • 3 Pages

    Lab 8 Isopentyl acetate 1

    Assemble a reflux apparatus (Figure 4) with a 50 mL round bottom flask with a heating mantle. Add 5 mL of isopentyl alcohol and 7 mL of acetic acid to the round bottom flask. While stirring add 1 mL of acetic acid to the round bottom flask. The solution was gently heated until the solution was boiling and then refluxed for 60 minutes. The solution was then transferred to a separatory funnel. 10 mL of DI water was added to the funnel. Then the funnel was carefully shaken and vented to allow gasses to escape. The solution was then allowed to rest for two minutes. After resting the bottom aqueous layer was drained rom the funnel. The water wash process was repeated again. Then the organic layer was washed with 5 mL of 5% sodium…

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

    Ap Chemistry Titration Lab Essay Example
    • 716 Words
    • 3 Pages

    Ap Chemistry Titration Lab Essay Example

    Titrations are a very useful method of discovering the amount or concentration of unknown substances. The method is very well suited towards acid-base reactions. Titrations are often used in industry to analyze products to be sold. In this lab, standardizations will be done in the first two experiments and then titration analysis in the third.…

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

    Enzyme
    • 585 Words
    • 3 Pages

    Enzyme

    First, we used a clean syringe labeled H2O2 and filled it with H202. Then, we transferred the contents of the syringe into a 60 mL cup labeled Baseline. Second, we used the plastic transfer pipet to add 1 mL of distilled water and added it to the Baseline cup. Third, we used the syringe labeled H2O2 to add 10 mL of H2O2 and transfer that into the Baseline cup. Fourth, we gently swirled the contents of the Baseline cup to mix the solution. Then, we used the syringe labeled Transfer and removed 5 mL of the solution in the Baseline cup into the cup labeled Titration. Lastly, we titrated the 5 mL sample of the Baseline solution.…

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

    Rat Law Determination of the Crystal Violet Reaction
    • 1044 Words
    • 5 Pages

    Rat Law Determination of the Crystal Violet Reaction

    2. Measure out 10 mL of 0.020M NaOH using a 10 mL graduated cylinder. Use another 10 mL graduated cylinder and measure out 10 mL of 2.0 x 10-4 c crystal violet solution.…

    • 1044 Words
    • 5 Pages
    Powerful Essays
    Read More
  • Good Essays

    Intermolecular Forces
    • 971 Words
    • 4 Pages

    Intermolecular Forces

    Experiment 9 is conducted to identify the importance of intermolecular forces and how they affect molecules. Intermolecular forces are forces between molecules that determine whether the molecule is a solid, liquid, or gas under standard conditions. In our lab, we measured the maximum and minimum temperature reached and time it took to reach it of alcohols and alkanes. In addition, we measured the vapor pressure of the liquid at different temperatures. Through Experiment 9, we concluded that molecules with hydrogen bonds or long chains in the structural formula have stronger intermolecular forces, and that as temperature increases the vapor pressure of a substance increases exponentially.…

    • 971 Words
    • 4 Pages
    Good Essays
    Read More

Related Topics