Answer to Question #182261 in General Chemistry for Homos

Question

Procedure:

1. Pour about 100 mL of water into a container/pot.

2. Place the container/pot on a stove and heat it for about a minute. Notice also if the water is already boiling or not.

3. Then, carefully touch the side of the container/pot (be very careful in touching the container/pot). Record your observation.

4. Next, place an ice into water. What do you observe? Record your observation.

5. Put water in a glass and pour 1 teaspoon of salt. Which substances flows on top? Record your observation.

6. Using the different solid substances (available at home) dissolve each in a glass of water with one teaspoon each. Observe what happens. Record your observation.

Guide Questions:

1. Observation about solubility of salt. Which substances flows on top? (Observation in Procedure 5)

2. Observation about the density of the different solid substances (available at home). (Observation in Procedure 6)

Answer 1

1.) My observation in procedure 5 is that, no substance flowed on top as the salt dissolves in the water. After pouring the salt, a homogeneous mixture was observed. This explains the fact that polar solvent dissolves polar substances, that is, like dissolves like. Polar substances will form a uniform mixture with polar solvent.

2.) After pouring the substances, some did not dissolve and this is due to their low density. The lower the density, the lower the solubility. The higher the density, the greater the solubility.