The Intermolecular Forces That Act Between Molecules And Different Types Of Molecular Substances

Use a glass beaker to pour an adequate amount of the liquid substance and use the pipette from the glass beaker.

6. Pour the salt solution into a clean tall glass so that the liquid level is 1/4 inch (0.5 cm).

Of the two alkane liquids studied n-Hexane was determined to have the stronger IMF of attraction by virtue of its experimentally determined lower ?T. Conversely n-Pentane has weaker IMF of attraction due to its larger ?T. As explained at length above, this is because it takes more energy to excite a molecule in liquid to leave (vaporize or become gaseous), when there are stronger IMF of attraction holding the molecules together in liquid form.

27. Heat the water to 40°C with an alcohol lamp by setting up the apparatus as shown in figure 3 below:

20) If the solid is still not dissolved, add a tiny amount of hexane and swirl again.

Ionic compounds are soluble in water to a certain point depending on the compound. The level of solubility changes among different compounds. Some ionic compounds can completely dissolve in water and appear to be a homogeneous mixture. Although, some ionic compounds dissolve very little, and could be considered insoluble, since it does not dissolve fully. Depending on the compound, the level of solubility can be high or low. However, ionic compounds could dissolve to a certain degree. If the solution appears to be a heterogeneous mixture, many may assume through visual representation that it may be insoluble. As stated previously, the smallest amount of solubility should be considered. To confirm whether or not the substance is soluble, observe the efficiency when conducting electricity. Due to practical reasons, the slightest solubility could be considered insoluble by people.

Fill a test tube about 1/3 full with cold tap water for use in step 34.

Again use the same liquid and use the pipet to make this paper towel until it's moist too.

3) Let the tip set for a minute, so that the liquid can saturate the internal

Step 2: Mix 80 mL of water into the cornstarch. Make sure the consistency of the mixture is smooth.

2. In a boiling water bath, heat a sample of distilled water. 3. Dissolve your sample in a minimum of water. To do this, add the water drop-wise to your solid, stirring well between each drop, until the solid just dissolves.

A. Your first step is to transfer the water beads from the colander into the empty water bottle.

Submerge the graduated cylinder in the plastic tub so that it is completely filled with water. Hold the open end of the graduated cylinder and move it vertically upside-down where the open end of the graduated cylinder is still submerged in the plastic tub. Clamp the graduated cylinder the ring stand of the lab table to keep it in place. perforate a hole in the top of the rubber cork for the solution container. Cut a straw the length of about four inches. place the straw inside of the rubber cork hole. Set up your timer for two minutes.

precipitate; then pour over the solid in the funnel. Finally, pour two 10-mL portions of

6. Squirt water once from bottle onto each of the smarties on both pieces of filter paper