Name: jasmine beckles
Lab#
:9
Page#:______
Date : 19th \Feb\2021
Skill :
Title:cells
Aim:to
observe the diffusion rephrase
Apparatus:
Funnel
Petri dish
Pencil & Paper
Compass
Forceps
Stop clock
Potassium permanganate
Fine sand
Distilled water
Procedure:
1)
Using a compass, draw 4 circles on a sheet of paper with the same center
with increasing diameter starting with 1cm and ending with 4cm.
2)
Place the paper on the table and then place petri dish directly over the circles
on the page
3)
Place funnel at the center of the petri dish, making sure it line up whit the
circles on the sheet of paper
4)
Using fine sand to make a small mound of dirt around the funnel
5)
Using forceps, place the potassium permanganate into the funnel
6)
Fill the petri dish whit distilled water and carefully remove the funnel
7)
Start stop clock and record time taken for the potassium permanganate to
reach the parameter of circle.
Results ::
table showing time taken for potassium permanganate to reach each circle
Circle
Distance (cm)
Time
1st
1 cm
6 sec
2nd
2 cm
1 min and 23sec
3rd
3cm
3 min and 27 sec
4th
4cm
5 min and 22 sec
Speed = distance divided by time
0.01 /6=0.16
0.02/83=0.24
0.03/207=0.144
0.04/322=0.124
Discussion :
Diffusion is the movement of a substance from an area of high concentration to an
area of low concentration until evenly distributed. The process of diffusion is a
passive transport system. This helps living organisms /cell to gain the useful
substances they require to obtain energy and grow and rid themselves of waste.
Completing this experiment did indeed satisfy my expectation.
Reflection:We
were able to see a visual representation of the diffusion process.
Limitations :surface
Precaution:1)
area to volume ratio
It was ensured that the table was not moved during the experiment
2)
Small amounts of crystal potassium permanganate was used to avoid it from
diffusing at a rapid rate
Sources of Error:
Conclusion : a
visual representation of the diffusion process was achieved