Science Sec 2 Express
Lab# ____
NAME: DATE:
CLASS: Teacher:
Group #: _________________ Group Leader:
THE POTATO OSMOSIS EXPERIMENT
GENERAL INSTRUCTIONS:
1. In this experiment, you are only given the procedure and the materials you will use
for the activity.
2. You will need to provide the following:
a. Research questions
b. Hypothesis
c. Independent, Dependent and Controlled Variables
d. Results and Discussion/Analysis
e. Conclusion
RESEARCH QUESTION/S:
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HYPOTHESIS:
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VARIABLES:
Independent variable Dependent variable Controlled variables
Osmosis in Potato Experiment Christabelle Delfiona Taran 10E -https://fiona-journal.weebly.com/uploads/1/1/0/4/110420005/osmosis_in_potatoes_lab_report.pdf
Jnuary1, 2021
Osmosis Science Activities for Kids. Taken from, https://sciencing.com/osmosis-science-activities-kids-6364184.html, last November 07, 2020.
BACKGROUND:
This experiment investigates the role of osmosis in cells; potatoes. The experiment also
determines the changes that occur in the potato, which are; texture, size, mass and color
changes after soaking the potato in different two kinds of water solution. The first one is
distilled water, and the second one is a salt solution.
GOAL:
Your goal is to demonstrate how osmosis occurs in everyday objects by conducting a simple
and inexpensive experiment in the laboratory.
MATERIALS:
1. Knife (scalpel)
2. 6-pcs of french fries-sized potato of exactly the same size (you can measure the length
and thickness using a ruler)
3. 2 250 ml beaker with 200 ml of room temperature water each
4. 15 grams of salt (Use the digital weighing scale in measuring the amount of salt.)
5. 1 250 ml Graduated cylinder
6. Digital balance
7. Labelling tape and pen
PROCEDURE:
1. Prepare all the materials needed.
2. Label the beaker, one with distilled water and the other with water and salt (saline)
3. Pour 200ml room temperature water on each beaker. Add 15grams of salt to one of
the beakers you labelled with saline. Stir until all salt is dissolved.
4. Before soaking the potatoes, record your observation with its original texture, colour,
size, and mass.
5. Soak three potato strips in distilled water and another three strips of water with salt.
This will serve as your three trials
6. Let the potato soak in the solution for 30 minutes.
7. After 30 minutes, remove the potatoes and put them in a tissue.
8. Measure the water left on each beaker using the graduated cylinder.
9. Record your final observations on the potato after the experiment, then write the
findings on the data table.
Osmosis in Potato Experiment Christabelle Delfiona Taran 10E -https://fiona-journal.weebly.com/uploads/1/1/0/4/110420005/osmosis_in_potatoes_lab_report.pdf
Jnuary1, 2021
Osmosis Science Activities for Kids. Taken from, https://sciencing.com/osmosis-science-activities-kids-6364184.html, last November 07, 2020.
Table of Raw Data
Table 1. Before experiment
Mass (g) Color Texture Size (length Water
and width) Solution (ml)
/cm
Potato In 200 ml
Solution 1
(Distilled 200 ml
Water)
200 ml
Potato In
Solution 2
(Saline
solution)
Table 2. After experiment
Mass (g) Color Texture Size (length Water
Changes and width) Solution left
/cm (ml)
Potato In
Solution 1
(Distilled
Water)
Potato In
Solution 2
(Saline
solution)
PROCESSED DATA TABLE
Find the difference between the mass, size, and water level before and after the experiment
(i.e. mass after - mass before). Then identify the mean from trials 1-3
mass size water level
Distilled water
Saline solution
Osmosis in Potato Experiment Christabelle Delfiona Taran 10E -https://fiona-journal.weebly.com/uploads/1/1/0/4/110420005/osmosis_in_potatoes_lab_report.pdf
Jnuary1, 2021
Osmosis Science Activities for Kids. Taken from, https://sciencing.com/osmosis-science-activities-kids-6364184.html, last November 07, 2020.
RESULTS AND ANALYSIS:
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CONCLUSION:
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Guide questions for Results and analysis:
1. Describe what happened with the 2 strips of potatoes after soaking. What makes them
different before soaking as to their color, size, and texture?
2. Which materials represent a semi-permeable membrane from among the materials
that you used?
3. What represents the water solutions that you used in the experiment?
4. Explain how you will relate your experiment to the principles of osmosis?
Osmosis in Potato Experiment Christabelle Delfiona Taran 10E -https://fiona-journal.weebly.com/uploads/1/1/0/4/110420005/osmosis_in_potatoes_lab_report.pdf
Jnuary1, 2021
Osmosis Science Activities for Kids. Taken from, https://sciencing.com/osmosis-science-activities-kids-6364184.html, last November 07, 2020.
