Flask Lab Report

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Register to read the introduction… Aprons and goggles on. Clean a 1000-mL beaker for use as a heating bath. Set the beaker on a hot plate and begin heating. 2. Clean and completely dry the Erlenmeyer flask. 3. Cut a square of aluminum foil to serve as the cover of the flask. Trim the edges so that it neatly covers the edge of the flask. 4. Weigh the empty flask with cover and record to as many sigfigs as possible. 5. Obtain your unknown liquid and record the ID #. Add 3-4 mL of the liquid to the flask. Re-cover the flask, making sure the edges are tightly crimped. 6. Punch a tiny hole in the foil cover with a needle or pin. 7. Heat the water in the beaker to boiling. Adjust the heat so that the water will remain boiling but will not splash. 8. Immerse the flask containing the unknown liquid in the boiling water so that most of the flask is covered. Clamp the neck of the flask. 9. Watch the liquid carefully. The liquid will begin to evaporate, and its volume will …show more content…
When it appears that the flask is completely filled with vapor, continue heating for 1-2 minutes. Remove the flask from the bath using the clamp. 11. Set the flask on the wire gauze on the lab table, remove the clamp, and allow the flask to cool to room temperature. Measure and record the exact temperature of the boiling water in the beaker, as well as the barometric pressure in the lab. 12. When the flask has cooled completely, carefully dry the outside of the flask to remove any water. Weigh the flask, foil cover, and vapor with as many sigfigs as possible. 13. Perform a second trial, if the final mass of the flask and vapor is not within 0.05g of the first trial, perform a 3rd. 14. When two acceptable trials have been performed, remove the foil cover and clean the flask. 15. Fill the flask to the very rim with water and pour it into a 1000-mL graduated cylinder to determine the exact volume of the flask. Record.

IV. Data and Observations

| |TRIAL 1 |TRIAL 2 |
|BAROMETRIC PRESSURE (mm Hg) |763.5 mm Hg |763.5 mm Hg …show more content…
|MASS OF FLASK AND FOIL COVER (g) |106.095g |106.095g |
|TEMPERATURE OF WATER IN BEAKER (°C) and |99.1°C / 372.1 K |97.9°C / 370.9 K |
|(K) | | |
|MASS OF FLASK/COVER AND CONDENSED LIQUID |106.406g |106.487g |
|(g) | | |
| | | |

• Volume of Erlenmeyer Flask (determined by filling completely with water):

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