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The Dissolution Solution!!

Problem: How does soap, alcohol, and temperature differences affect the dissolution speed of water?

Hypothesis: _______________________________________________________.

Materials: Food coloring, watch, water, eyedroppers, warm water, rubbing alcohol, dish soap, ice cubes, plastic cups, small plastic bags

Procedure:

1.You will work in-groups of three. You will need a clear plastic cup of warm water and an eyedropper holding some food coloring (red or blue). Also get some ethyl alcohol and dish soap.

2. Place a drop of food coloring in a cup of water. Record how many seconds it takes to completely dissolve in the water?

3. Place one or two ice cubes in the cup of water. Place a drop of food coloring on an ice cube. What happened?

4. Place a drop of food coloring in the cold water. How many seconds did it take for the food coloring to completely dissolve in the cold water?

5. Place a drop of food coloring in a cup of water. Add a few drops of alcohol. How does the alcohol affect the solution?

6. Add a drop of food coloring to a cup of warm water. How many seconds does it take for the coloring to dissolve completely in the warm water?

7. Add another drop of food coloring to the water. Then add a few drops of dish soap to the water. What happened?

8. When you are completely finished you should make a bar graph representing the solutions versus time of dissolving.

Note: You should develop a data table for this lab. You should fold the paper in half vertically and in thirds horizontal, as shown to the right.

For steps 2 through 7 you should draw a picture of what happens and record the respective times in each box. Make sure to label which step is represented by each box (#'s 2-7).

Your data table should resemble the figure below:

Conclusion Questions:

1. What is diffusion?

2. What is osmosis?

3. What is Active Transport?

4. What is Respiration?

5. What is Fermentation?