Diffusion Experiment Question How does temperature effect the

Diffusion Experiment

Question • How does temperature effect the rate of diffusion? • Hypothesis:

Test • See how long it takes for a drop of food coloring to diffuse at different temperatures.

Chart Setting Stirring 200 C 250 C 300 C 350 C Diffusion Time

Equipment • • • 250 ml beaker Hot plate Food coloring Temperature Probe Timer

Safety • Goggles Needed because we are working with liquids • Using hot plate – Watch hands and arms around the hot plate – No horseplay – Pick up the beaker by the top from the hotplate

20 degrees Celsius Fill beaker with 100 ml of water Let the water sit for 1 minute Turn the hot plate on 2 Set the beaker on the hot plate until it reaches 200 C • Add 1 drop of food coloring • Time how long it takes for the food coloring to diffuse evenly and record in the chart • •

25 degrees Celsius • Fill beaker with 100 ml of water (be sure to completely rinse out the food coloring) • Let the water sit for 1 minute • Turn the hot plate on 2 • Set the beaker on the hot plate until it reaches 250 C • Add 1 drop of food coloring • Time how long it takes for the food coloring to diffuse evenly and record in the chart

30 degrees Celsius • Fill beaker with 100 ml of water (be sure to completely rinse out the food coloring) • Let the water sit for 1 minute • Turn the hot plate on 2 • Set the beaker on the hot plate until it reaches 300 C • Add 1 drop of food coloring • Time how long it takes for the food coloring to diffuse evenly and record in the chart

35 degrees Celsius • Fill beaker with 100 ml of water (be sure to completely rinse out the food coloring) • Let the water sit for 1 minute • Turn the hot plate on 2 • Set the beaker on the hot plate until it reaches 350 C • Add 1 drop of food coloring • Time how long it takes for the food coloring to diffuse evenly and record in the chart • Turn off hotplate

Stirring • Fill beaker with 100 ml of water (make sure to completely rinse out beaker) • Let the water sit for 1 minute • Add 1 drop of food coloring and stir the water gently as you add it • Time how long it takes for the food coloring to diffuse evenly

Clean Up • • • Check to make sure hotplate is off Rinse out beakers Wipe up any spills Put cap on food coloring Return equipment Return goggles

Conclusion • Was the rate of diffusion faster for higher temperatures? • Why? • How was this related to stirring the water?