12.1: An Investigation OF Intermolecular Forces - Experiment — Read

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SAFETY PRECAUTIONS

1) Always wear chemical splash goggles while working on this experiment.

2) Gloves are provided for you if you wish to wear them.

3) Work with all chemicals in a well-ventilated area or under a fume hood.

4) At the end of the experiment, dispose of all used chemicals in the appropriate waste container.

5) Wash and return all glassware to the appropriate place.

6) Thoroughly clean your work area before leaving the lab.

7) Wash your hands as soon as you leave the lab.

**EQUIPMENT* AND CHEMICALS NEEDED**

Table \(\PageIndex{1}\): Equipment and Chemicals
EQUIPMENT	CHEMICALS	CHEMICALS
Well plate	Deionized water	Ethyl acetate
600 mL beaker	Methanol	Butyl acetate
7 small test tubes	Ethanol	Hexane
Test tube rack	Isopropyl alcohol	Non-halogenated organic waste container
Thermometer	1-butanol	-

* Images of equipment needed in this lab can be found in the appendix (the equipment may differ or be subject to changes; follow your instructor’s directions).

EXPERIMENTAL PROCEDURE

Part A: Properties of liquids

For each of the liquids used in this experiment, draw the appropriate Lewis structure, predict whether the substance is polar or non-polar, determine the molar mass, identify the most important intermolecular force present, and do a literature search to find the boiling point (in ^oC). Record all this information in the data table.

Part B: Solubility

Obtain seven small test tubes and a test tube rack. To each test tube, add 1 mL of deionized water. Then, add 1 mL of the given liquids to the following test tubes:

Test tube 1 = methanol

Test tube 2 = ethanol

Test tube 3 = isopropyl alcohol

Test tube 4 = 1-butanol

Test tube 5 = ethyl acetate

Test tube 6 = butyl acetate

Test tube 7 = hexane

Gently shake each test tube and determine whether each liquid is soluble in water. Record your observations in the data table. Dispose of the contents of each test tube in the non-halogenated organic waste container.

Part C: Evaporation

1) Half fill wells in a Well plate with each liquid (deionized water, methanol, ethanol, isopropyl alcohol, 1-butanol, ethyl acetate, butyl acetate, and hexane).

2) Determine the initial temperature of the deionized water using a Celsius thermometer or the temperature probe with LabQuest. Be sure to hold the thermometer in the liquid until the reading stabilizes.

3) Once the initial temperature has been recorded, remove the thermometer from the water and hold it in the air. Once the temperature stabilizes, record the final temperature.

4) Repeat this procedure for each liquid.

5) Once you have completed this procedure, pour the contents of the well plate into a 600 mL beaker and then transfer the beaker's contents into the non-halogenated organic waste container.

12.1: An Investigation OF Intermolecular Forces - Experiment is shared under a not declared license and was authored, remixed, and/or curated by LibreTexts.

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