Salome Ekai
Sir Benard Osoro
18th May 2022
INVESTIGATING HOW TEMPERATURE AFFECTS THE RATE OF DIFFUSION.
Define the problem
How does temperature affects the rate of diffusion?
Diffusion is the movement of particles from high concentration areas to low
concentration areas, or the mixing of particles. (Johnson, 2017).Both of these
phenomena rely on the mobility of atoms and are thus sensitive to the
temperature effects stated before. The process of diffusion accelerates as the
temperature rises, and the quicker molecules spread out or mix with other
molecules more quickly.
Hypothesis
If the temperature is high then the diffusion will happen faster because the
kinetic energy of the molecules will increase.
This is because when the temperature is increased the the molecules will gain
more kinetic energy and they will move and mix more quickly.
Variables
Independent variable
(X axis )
Temperature
Dependent variable
(y axis)
Time taken for water
to be coloured.
Control variable1
The beakers
Control variable 2
Amount of potassium
permanganate crystals
used.
Apparatus/ materials.
1. water( hot & cold)
2. Six beakers 250 ml
3. Potassium permanganate crystals
4. Stop watch
5. Thermometer
6. Labels
7. Spatula
Procedure
1.Collect water samples from warm, cold, and room temperature.
2.Take temperatures of each water sample and record them on the data table.
3. Label your beakers 1 warm water, 2 chilly water, and 3 room temperature water.
4.In beaker 1, measure out 50 mL of warm water.
5.In a beaker, measure out 50 mL cooled water. 2
6.In a beaker, measure out 50 mL of room temperature water. 3.
7.put the potassium permanganate in each of the beakers and start the stopwatch.
8.Repeat step 1 to 7 for at least 3 trials so that to get sufficient data.
Safety measures
1.Avoid contact with the potassium manganate because it can severely irritate and burn the
skin and eyes woth the possible eye damage.
2.Wear the right attire like lab coat ,gloves when conducting the experiment.
3.Be careful when handling the apparatus
Data collection:raw data
Diffusion Rates of Different Water Temperatures
Beakers/samples Temperature Time of
Time of
Time of
Average
diffusion diffusion diffusion
(Seconds) (seconds) (seconds)
Hot water
78.4
265
292
480
Chilled water/ice
9.4
561
732
546
Room
temperature
water
28.8
313
594
612
Processed data
Beakers/samples Temperature Time of
Time of
Time of
Average
diffusion diffusion diffusion
(Seconds) (seconds) (seconds)
Hot water
78.4
265
292
480
5 mins
Chilled
water/ice
9.4
561
732
546
29 mins
Room
temperature
water
28.8
313
594
612
8
Graph: Diffusion Rates of Different Water Temperatures
Evaluating the hypothesis .
mins
If the temperature is high then the diffusion will happen faster because the kinetic of will
increase.I support this hypothesis because of the graph which I used to find my investigation.
The graph shows how temperatures when increased it takes less time to diffuse.
Analysing
Our findings revealed a wide range of diffusion rates. It took 5 minutes to determine the
diffusion rate in cooled water. It took 8 minutes to determine the diffusion rate in room
temperature water. Finally, at 29 minutes, the diffusion rate for cooled water took the longest.
The findings revealed that as the temperature was raised, the diffusion rate reduced. The
patterns revealed that room temperature water required the most time to disperse. Some
examples of human blunders include placing the potassium permanganate into a beaker of
water rather than a glass tube. Other variables that may have influenced the results were if the
water temperature changed during the experiment and whether the warm water was closer to
room temperature at the conclusion of the trial.
Conclusion
If the temperature is high then the diffusion will happen faster because the kinetic of will
increase. I learned that the diffusion rate for hotter substances is faster and in cold water is
slower.For example in real life it will help when dipping the tea bags in hot water will
diffuse the teabag in it.