Name: Bisnan, Ysabel Mari M. Professor: Ma’am Gecelene Est
Date: July 18, 2022
Activity 6 Osmosis in Potato Strips
I. Introduction:
Most water in the ground is not pure water. It usually contains dissolved mineral salts. Animals
salts (which include calcium, magnesium, potassium and the sodium you might be familiar with
develop and stay healthy. Different water sources carry different amounts of these salts. Nature wa
that is not balanced. So if you mix water with two different salt concentrations, the salts don't sta
out evenly through the solution until the salt concentration is the same throughout.
A semipermeable membrane is a type of barrier that only lets certain particles pass through whil
type of membrane usually lets water pass through but not the salts that are dissolved in the w
because only water can move through this membrane, the water will start moving from t
concentration (which has more water and less salt) to the area of higher salt concentration (which h
salt). This water movement will only stop once the salt and water concentration on both sides o
same.
The process of moving water across a semipermeable membrane is called osmosis. Plants us
advantage for water uptake. They create an environment of high salt concentration in their root c
with the soil. The cell walls act as a semipermeable membrane that only let water through. Becaus
root cells has a lower salt concentration, water starts moving into the root cells due to osmosis.
plant fills up the cells and can travel to the rest of the plant. Osmosis, however, works in both direc
into water with a salt concentration that is higher than the concentration inside its cells, water wi
to balance out the concentration difference. As a result the plant shrinks and eventually dies. You
your own eyes in this activity using potatoes and different saltwater solutions.
II. Objectives
● To investigate the change in mass in potato strips over a period of time when immersed in di
(hypotonic solution) and salty water (hypertonic solution).
III. Materials
● Potato Strips
● Salt (0g, 1g, 2g, 3g, 4g, 5g)
● Water
● Container
● Beaker
● Graduated Cylinder
IV. Procedure
1. Wash the potato in order to remove all the dirt and residue.
2. Using a knife, cut the potato horizontally by 6 cm, in total of 18 pieces. Arrange the 18 slices of po
of potato in each set.
3. Fill each container with 100 mL of water, then arrange the containers in line and pair the sets of p
container.
4. Add the salt (0g, 1g, 2g, 3g, 4g, 5g) in each container and stir.
5. Label all containers according to their salt concentration.
6. Place the set of potatoes in their corresponding containers, and wait for 20 minutes.
Date: July 18, 2022
Activity 6 Osmosis in Potato Strips
I. Introduction:
Most water in the ground is not pure water. It usually contains dissolved mineral salts. Animals
salts (which include calcium, magnesium, potassium and the sodium you might be familiar with
develop and stay healthy. Different water sources carry different amounts of these salts. Nature wa
that is not balanced. So if you mix water with two different salt concentrations, the salts don't sta
out evenly through the solution until the salt concentration is the same throughout.
A semipermeable membrane is a type of barrier that only lets certain particles pass through whil
type of membrane usually lets water pass through but not the salts that are dissolved in the w
because only water can move through this membrane, the water will start moving from t
concentration (which has more water and less salt) to the area of higher salt concentration (which h
salt). This water movement will only stop once the salt and water concentration on both sides o
same.
The process of moving water across a semipermeable membrane is called osmosis. Plants us
advantage for water uptake. They create an environment of high salt concentration in their root c
with the soil. The cell walls act as a semipermeable membrane that only let water through. Becaus
root cells has a lower salt concentration, water starts moving into the root cells due to osmosis.
plant fills up the cells and can travel to the rest of the plant. Osmosis, however, works in both direc
into water with a salt concentration that is higher than the concentration inside its cells, water wi
to balance out the concentration difference. As a result the plant shrinks and eventually dies. You
your own eyes in this activity using potatoes and different saltwater solutions.
II. Objectives
● To investigate the change in mass in potato strips over a period of time when immersed in di
(hypotonic solution) and salty water (hypertonic solution).
III. Materials
● Potato Strips
● Salt (0g, 1g, 2g, 3g, 4g, 5g)
● Water
● Container
● Beaker
● Graduated Cylinder
IV. Procedure
1. Wash the potato in order to remove all the dirt and residue.
2. Using a knife, cut the potato horizontally by 6 cm, in total of 18 pieces. Arrange the 18 slices of po
of potato in each set.
3. Fill each container with 100 mL of water, then arrange the containers in line and pair the sets of p
container.
4. Add the salt (0g, 1g, 2g, 3g, 4g, 5g) in each container and stir.
5. Label all containers according to their salt concentration.
6. Place the set of potatoes in their corresponding containers, and wait for 20 minutes.
