Diffusion+Experiment

= **Lab:** =

**Title:Effect of Temperature on the Rate of Diffusion**
__**Purpose**__: How does temperature affect the rate of diffusion?

__**Hypothesis**__: If there is an increase in temperature(independent variable), then the speed(dependent variable) of molecular motion should increase.

__**Materials**__:3 clear cups,1 bottle of food coloring,small tray, ice water, room temperature water, hot water,Sharpie marker

__**Procedure**__:
 * 1) Place 3 cups in the small tray.
 * 2) Mark the cups as H for hot water, R for room temperature water, and C for cold water.
 * 3) Fill the cups about 1/4 full with each water sample.
 * 4) Place a drop of food coloring in the cold water and observe. Record the time it takes for the color to diffuse,
 * 5) Place a drop of food coloring in the room temperature water and observe. Record the time it takes for the color to diffuse.
 * 6) Place a drop of food coloring in the hot water and observe. Record the time it takes for the color to diffuse.

__**Results**__: __**Safety**__: Be careful with hot water. __**Clean Up**__: All materials can go down the drain.
 * Sample || Observations || Time for Diffusion ||
 * Cold ||  ||   ||
 * RoomTemperature ||  ||   ||
 * Hot ||  ||   ||

__**Conclusion**__ Conclusions can be written with the "RERUN" method. R - Recall what you physically did E - Explain the purpose R- Results of the experiment U - Uncertainties(errors) that could have occurred N - New things you learned