Osmosis Paper

Osmosis Paper
Osmosis Planning Aim To investigate osmosis in potato chips in varying concentrations of solution
(sodium chloride (Nacl) and distilled water) and its effects. To see the change in mass before and
after the effect of osmosis. Osmosis Osmosis is the movement of water from a less concentrated
solution to a more concentrated solution through a partially permeable membrane. This occurs in
situations such as the movement through a cell wall, it allows smaller molecules through but not
bigger molecules. The molecules will diffuse until the area where the molecules are reach
equilibrium. Prediction I think that the increase of the concentration of the solution in the test tube
the lower the mass of the potato will be. I came ... Show more content on Helpwriting.net ...
Another thing i had to take into account was the type of potato I used as i didn't want the results to
be affected by a change in water mass in the potato as different types of potatoes containing varying
masses of water, also some potatoes could be more pores and would end up affecting my results and
providing me with more outliers. The dependent variable is the substance that we measure in the
experiment for the purpose of my investigation the dependant variable is the potato chips as the
change in mass will allow us know the effect of osmosis, and how much effect did occur. For my
investigation i will measure the potatoes in grams for a better reading however when drawing up my
graph to compare the results I believe that using percentages will be easier and more understandable.
To hopefully achieve better results i will use the same equipments throughout just as a precaution.
Preliminary During our preliminary we used two different concentrations. Sodium chloride and
distilled water. We used both of them and compared them to each other. We chose to use the 5 molar
sodium chloride concentration and distilled water. However for the actual investigation we would
use more concentrations that would go in–between the two extreme concentrations. We used a
volume of 60ml and 20ml. Then out of the two we chose the one that showed us the most promising
results to use for the main investigation. We ended up choosing the 60ml as
... Get more on HelpWriting.net ...

How Much Of A Difference Can 24 Hours Make?
How Much of a Difference Can 24 Hours Make?
My lab was based on one very important question, how can the weight of potatoes change if
they are submerged in two saline solutions (1.0M and 0.5M) for twenty–four hours. The experiment
requires six pieces of potatoes, cut into two inch rectangular pieces. It also requires an electric scale
to measure the weight of the potatoes. The last thing required is two solutions that are in beakers,
one must have a 1.0M saline solution, and the other must have a 0.5M saline solution. While doing
the research for this project, I produced my hypothesis, I believed that if the three potatoes in the
1.0M solution were submerged all night, then they would loose more weight due to the
overwhelming amount of salt in the saline solution. The water from the potato would exit, causing a
notable amount of weight loss. This was my hypothesis because of the amount of water that would
leave the potato when osmosis was taking place. For my hypothesis along with the experiment, I
found a few websites to be crucial to my understanding of osmosis/diffusion and the process that
would be taking place to the potatoes. An article that benefitted me was an article called ''Osmosis in
Potatoes'' by Claude E. Phillips Herbarium, this source gave important information to better my
background information going into the experiment. I learned that the water in the potato moved
outwards due to the high amount of salt in

Potato Osmosis Lab
The Effect of a Solute in Osmosis through a Solanum Tuberosum
Introduction: In this experiment, I will be studying if the type of a solute in water affects the rate of
osmosis through the insides of a potato. I will be using three water solutions, one with salt and one
with sugar, and plain water as a control group. Two of the solutions will have 250 milliliters of water
with molarities of one for the two salt and sugar solutions. There will be two other solutions that
will have 250 milliliters of water and have molarities of two for both salt and sugar solutions, so
overall, there will be five solutions. I think that this is an interesting topic because I think that this
experiment will be fun to create and also informative about the factors that affect osmosis. ... Show
more content on Helpwriting.net ...
This could have affected the results because the potatoes might absorb the solutions in different
because of their different attributes. Also, the timing was a little off between Test 1 and Tests 2
through 5 because through certain limitations on time and various constraints, Test 1 soaked in
solutions for 28 hours whereas Tests 2 through 5 soaked for about 26.5 hours. This could have
caused some problems with the collected data, but overall, Tests 2 through 5 follow similar trends to
the initial test, so discrepancies were kept minimal. In addition to the timing being slightly off, the
potato cubes from all of the tests were cut at the same time; however, only Test 1 used the freshly
cut potatoes due to time constraints. Tests 2 through 5 used drier potatoes, which could have affected
the data. And of course, human error such as the amount of the solution poured in, the exact amount
of solutes in the solutions and the measurements taken. If this experiment were to be repeated, it
should have stricter timing, identical testing materials and more careful

Effect Of Sugar On Osmosis
The effect of sugar solutions (%)with different concentration levels on the rate of osmosis in
cylinders of potatoes(+/–0.01g)
Research question:What is the effect of sugar solutions(%) with different concentration levels on the
rate of osmosis in cylinders of potatoes(+/–0.01g)?
Hypothesis:The prediction that is stated is if the concentration level of the sugar solution is higher
then the mass of the potato cylinders will increase (hypertonic)because of a process known as
Osmosis.Osmosis is the chemical process of diffusion which is the passive movement of particles
from a region of high concentration to a low concentration.["Diffusion."And Osmosis]In other
words they allow certain substances to enter the cell and certain substances that ... Show more
content on Helpwriting.net ...
Try 3–4 times to get as accurate results as possible.
The electronic mass kept on changing by saying error
This would affect the results as some of the results would be inaccurate
Wait one minute till the electronic mass turns to 0 then place the potato cylinder
Not enough experiments with different independent variables
Wouldn't of got accurate results therefore there would be an outlier in the graph
Repeat the same experiment 3–4 times
Work Cited:
"Plants For Kids."Osmosis in Potatoes Experiment. N.p., n.d. Web. 29 Oct. 2014.
"Osmosis Experiment For Kids: Potato, Water, and Salt."Udemy Blog. N.p., n.d. Web. 28 Oct. 2014.
"Simple Science Experiment: Osmosis with Potato Slices."Simple Science. N.p., n.d. Web. 28 Oct.
2014.
"Diffusion."And Osmosis. N.p., n.d. Web. 29 Oct. 2014.
"Welcome to the Living World.": Comparison between Diffusion and Osmosis. N.p., n.d. Web. 02
Nov.

Biology Eei Essay examples
| 2012 | | Toby Rheinberger
Lab Partner: Jeremy Saba |
[The Effect of surface area to volume ratio and solute concentration on osmosis.] | The aim of this
experiment was to test the effect of surface area on osmosis and the effect of solute concentration on
osmosis. To test this aim to hypotheses were devised. 1) If potato pieces are immersed in various salt
solutions, then the pieces with the greatest surface area to volume ratio will experience the greatest
weight change, because more water can move by osmosis across the potato cell's semi permeable
membrane. 2) If potato pieces are immersed in various salt solutions, then the pieces immersed in
the most concentrated solution will experience he greatest weight change, ... Show more content on
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A semi permeable membrane. (Biology at Aveson , 2007)
Figure 2. A semi permeable membrane. (Biology at Aveson , 2007) pass through the membrane and
into the cell.
Despite its importance osmosis may also damage cells by causing them to; a) shrink from water loss
or b) burst from too much water gain. Plant cells [fig 3] have adapted themselves to ensure that
these factors do not affect them, by forming a ridged wall, known as the cell wall, around their cells.
The cell wall maintains the shape of the cell, and prevents the cell from bursting in a hypotonic
medium by resisting water pressure. Plant cells have also adapted a larger vacuole, which occupies
80% or more of the cells cytoplasm (Davidson, 2004); allowing plants to store more water and
nutrients per cell. Vacuoles also play a structural role in plant cells; by swelling when liquids contact
them, plant vacuoles are able to control turgor pressure within the cell. This helps maintain the
structural integrity of the cell as well as providing the plant with suitable amounts of water and
nutrients; however the cell will never burst because the vacuole is contained within the cell wall. If
plant cells are deprived of water their vacuole will begin to shrink, yet due to the cell the wall, the
plant cell will be able to maintain its shape. [fig.4] Animal cells [fig 5] on the other hand do not have
this

Effect Of Sucrose Concentration On Potato Osmosis
Research question:
What is the Osmolarity (solute concentration) of potato tubers deduce by measuring the loss or gain
in mass of samples immersed in sucrose solutions of different concentrations for 24 hours? The
concentrations of sucrose solution are 0.0mol 〖dm〗^(–3), 0.2mol 〖dm〗^(–3), 0.4mol 〖dm〗
^(–3), 0.6mol 〖dm〗^(–3), 0.8mol 〖dm〗^(–3), and 1.0 mol 〖dm〗^(–3).
Hypothesis:
When plant tissues are immersed in sucrose solutions of different concentration, the cells will gain
or lose water by osmosis and therefore change in size and mass. If the potato samples are immersed
with hypertonic solution, the mass of samples will be reduced as the hypertonic solution has a
higher solute concentration which makes the water move towards it. If the potato ... Show more
Osmosis is the passive trend of a fluid, usually water, to pass through partially permeable membrane
into a higher concentration of sucrose to equalize the concentrations of solution on either side of the
membrane. Factors affecting the rate of osmosis include temperature, surface area, and size of
particles and concentration of the sucrose.
Potatoes are generally grown from other potatoes by planting another piece of potato. This planted
potato has several slightly recessed, dormant buds on the surface which will sprout at the right
condition and the sprouts can develop into independent plant. The planted potato provides the new
sprout or seedling with nutrition from its supply of stored starch. After a seed is planted, the main
stem and first leaves appear above ground. The root system progresses quickly and begins to absorb
nutrients. The top, where it has most leaves of the plant puts on a lot of growth. Then the growing of
main stem of the plant ends producing a flower bud. When this happens, the plant will have many
leaves causing them to eventually produce more nutrients than the plant needs, making excess
energy to channel downward to be stored in the tubers which are thick, short, underground stems.
They are the

Lab Report On Osmosis Experiment Essay
Lab Report 4 Osmosis in Potatoes
Introduction
In this lab we are going to discovery how osmosis works using a semi–impermeable membrane a
potato slice. Osmosis is known as the movement of water in and out of a cell. To understand how
this works we must understand two terms. Hypotonic means the environment has less solutes
compared to the inside of the cell. Hypertonic means that the environment has more solutes
compared to the inside of the cell. With osmosis water will always move from hypotonic too
hypertonic. So the question is will water move into the potato or out of the potato? Will these results
change when placed in different morality of salt water? To calculate these results, we will measure
the mass of potatoes cut into equal sizes then soak these potato slices in different morality of NaCl
for thirty minutes and measure the mass change in each potato slice.
Materials
Potato (four slices)
Knife
Beaker (4)
Salt Solution .2, .4, .6 mol
Distilled water
Food Scale
Paper Towels
Methods
First I gather all my materials needed for the experiment (see materials list). Second I peel and slice
potatoes weigh each potato in grams. Get these slices to weigh the same in mass because if they
vary to much in mass that could affect the results of the experiment. Third I place each potato in its
own beaker. Fourth once the potatoes are placed in beakers I make sure to place enough solution to
fully cover the potato. Each beaker should have a different amount of

The effect of osmosis in potato cells with different...
The effect of osmosis in potato cells with different concentrations of sucrose solution
Aim: To test the effect of different concentrations of sucrose solution to osmosis in a potato cells by
putting potato pieces in test tubes of water containing different concentrations of sucrose solution.
Scientific Theory:
Osmosis is defined as the movement of water molecules across a partially permeable membrane
from a region of high water concentration to a region of low water concentration. In a high
concentration of water the amount of solute (e.g. sugar) is low. This could be called a weak or dilute
solution. In a low concentration of water the amount of solute (e.g. sucrose) is high. This could be
called a strong or ... Show more content on Helpwriting.net ...
Prediction: I think that the higher the concentration of sucrose the larger the amount of water will be
transported into the potato cells as osmosis is the net flow of water through a selectively permeable
membrane from a high water concentration to low water concentration.
This means the water molecules from a low sucrose solution will move water molecules but not
sugar molecules through the potato skin into the potato cells making it turgid and absorb water
molecules from the solution surrounding it. In a higher concentration of sucrose in a solution the
same process will occur but less water can be transported as there will be more sugar and less water
meaning that excess water from inside the potato cells will transport from the cells to the high
sucrose concentration solution which will cause the potato to shrink and become flaccid.
Plan
Apparatus:
1 potato
Cork borer
Sucrose solution
Distilled water
10 Test tubes (boiling tubes)
Burettes
Scales
I will be measuring the mass of the potato piece after osmosis has occurred in the test tube, after the

process has happened I will take out the potato and dry it to ensure excess water is not added to the
results which could produce an anomalous result, I will then place the potato piece onto the scales
and note the results on a table.
The control variable in my experiment is the water that

Potato Osmosis Lab Report
Osmosis, the diffusion of water through a semi–permeable membrane, shows that water tends to
flow from a hypoosmotic environment to a hyperosmotic environment. There are many proposed
explanations for why and in what context this osmosis occurs. One explanation is a "concentration
of particles" explanation called van't Hoff's Law. This law states that the size of a particle will not
change the water potential or occurrence of osmosis in a solution–submerged cell, only the amount
of the solute in the solution will affect osmosis. To test this, we used three different sized solutes–
sucrose, glucose, and NaCl–to see if the size of the solute had an effect on the osmosis of water into
or out of white potato cells that were submerged in solutions containing the 3 solutes. We found that
the size of the particles of solute does not affect osmosis of water into or out of the potato cells, only
the amount of particles present in the outside solution, thus supporting van't Hoff's Law.
Introduction
In this lab, the concentrations of different solutions were used to display the effect different sizes
and different amounts of solute would have on the movement of water into or out of white potato
cells.
For this lab, white potatoes were used to find the effect of the size of particles on the osmosis and
water potentials of the potatoes. The simplicity of the potato and the ease of access made them good,
constant variables for the experiment. The average expected water potential for the

Diffusion And Osmosis Lab Report
Diffusion and Osmosis Lab Report Introduction:
Cells are always in motion, energy of motion known as kinetic energy. This kinetic energy causes
the membranes in motion to bump into each other, causing the membranes to move in another
direction – a direction from a higher concentration of the solution to a lower one. Membranes
moving around leads to diffusion and osmosis. Diffusion is the random movement of molecules
from an area of higher concentration to an area of lower concentration, until they are equally
distributed (Mader & Windelspecht, 2012, p. 50). Cells have a plasma membrane that separates the
internal cell from the exterior environment. The plasma membrane is selectively permeable which
allows certain solvents to pass through ... Show more content on Helpwriting.net ...
Showing an example of diffusion with the water molecules equally back and forth the semi–
permeable membrane of the potatoes and the saucer of water. The hypertonic solution of salt water
has given an example of osmosis. The water molecules passed through the semi–permeable
membrane out of the potatoes but weren't able to get back in as easily due to the salt blocking the
membranes passage. This left the potatoes in the salt water saucer feeling flexible and spongy
almost leaving the potato a little

Diffusion And Osmosis Lab Report
Adriana Alvarez
2/19/16
Diffusion and Osmosis Lab Report
Diffusion and Osmosis Lab Report
Introduction In this experiment, potatoes and glucose were used in order to simulate the process of
cells maintaining a normal state in aqueous solutions. The cell will move certain solutes across the
membrane of the cell by a process called diffusion. Diffusion is a process in which molecules from a
high concentration to a low concentration in order to reach a state of equilibrium (Lab Manuel 94).
If there is an unequal balance between the two sides of the membrane, then a specific kind of
diffusion will occur called osmosis. Osmosis is the diffusion of water through a membrane from a
highly concentrated area to a lower concentrated region (Lab ... Show more content on
Helpwriting.net ...
This shows the relationship between the concentration and the percent in weight change. The
concentration is on the x–axis and the percent change is located on the y–axis. The line has a trend
that moves downward until it reaches negative numbers to show that the cylinders LOST weight.
Discussion The hypothesis that was stated prior to the lab was that the potato was going to be
isotonic with the 0.1 solution. As seen from the data, the potato was isotonic with the 0.2 solution.
This is because there was the least amount of weight change showing that the concentrations were
isotonic and osmosis did not occur as much. As oppose to the concentration of 0.6 which caused
weight percent to drastically decrease. This means that the two solutions were not equal and osmosis
occurred and changed the initial weight of the potato. This shows what occurs in cells when they're
placed in a hypertonic or hypotonic solutions. When placed in a hypotonic, the potatoes gained
weight and when placed in a hypertonic solution, the potatoes lost weight due to osmosis. During
the experiment, an intended step of the procedure was to cut the cylinders in half but that was not
done. This could have effected out data because not as much osmosis occurred as if they were cut in
half. There would have been bigger changes in weight, therefore better data to base our conclusion
on. Taking this experiment one step further, one could ask

The Effect of Solute Concentration on Osmosis in Potatoes.
Martina Oganesyan
Title of investigation: The effect of solute concentration on osmosis in potatoes.
Research question: What is the solute concentration of a potato?
Hypothesis:
Osmosis is the movement of water across the membrane from an area of high concentration to an
area of low concentration. The osmosis continues until the solute concentrations are equal in both
areas. In this experiment, we put pieces of potatoes into test tubes with sugar solutions of different
concentrations and leave them there over night. It was done in order to compare the initial mass of
the pieces and the ones after being placed into the solute concentration. Pieces which were placed
into a hypotonic (lower) concentration of solute should increase in ... Show more content on
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From this we can conclude that measuring mass gives more logical and accurate results than
measuring length. It is so because a balance measures more precisely than a human eye using a
ruler, which also doesn't even take into account if there is a widening in the potato pieces.
However, there are also some errors in this experiment. Firstly, the potato pieces were not exactly
the same size despite the care taken to cut them. A solution to this would be to use a form cutter,
which would cut exactly equal shapes. Secondly, the temperature is not exactly a constant variable
as it fluctuated throughout the experiment as the test tubes were even put in a refrigerator with a
much lower temperature than in the room. A solution for improving could be to place the test tubes
into an electric cooler in the beginning to make the temperature stable and put potato pieces when
the test tubes are in the cooler. Also, errors could be decreased by using a more precise beaker.
Finally, repeating the experiment several times would allow as to take the average results and have a
more adequate result.
Conclusion:
Thanks to this experiment, we are able to answer our research question. The solute concentration of
a potato is 0.47 mol/l. Also, we can deduce that the method of measuring the mass gives more
accurate results than the method of measuring the length. I say that because the correlation
coefficient obtained was 0.95 which is very close to 1. However, there are

Lab Report: Osmosis Essay examples
Aim The aim of this experiment is to investigate the effects of different concentrations of sugar
solutions on the rate of osmosis in plant cells.
Equipment
5mm borer Knife White Tile
Potatoes Beakers Measuring cylinder Stopwatch Sugar solutions Paper towels
Balance Pipette
Scientific knowledge
Osmosis Osmosis is the movement of water particles from an area of high concentration to an area
... Show more content on Helpwriting.net ...
I will have the 11 experiments set up simultaneously as the experiments will all begin and end at the
same time. I will first collect 11 small beakers and two identical small measuring cylinders. I will
label the beakers to identify which concentrations are in each one. The concentrations I will use are
0%, 2%, 4%, 6%, 8%, 10%, 12%, 14%, 16%, 18% and 20%, therefore I will label each beaker with
one of these numbers. I will then collect the 0% concentration of sugar solution and use the pipette
to transfer it into the measuring cylinder until 30ml is reached. I will put the measuring cylinder on a
flat surface and read from the meniscus to ensure accuracy. This will be poured into the first beaker.
I will then wash the measuring cylinder out and leave it upside down to drain whilst I use the second
measuring cylinder to measure 30ml for 2% concentration. I will do this for all the concentration
until all the beakers are filled. I will then collect several potatoes, a white tile, a knife, a 5mm borer
and paper towels. I will cut 11 cylinders out of the potatoes. I will then measure 4cm on a ruler and
cut the cylinders to size. I will try to make the cuts as straight as possible so that all the cylinders
have the same surface area, and the same chance of osmosis. I will then dab–dry each cylinder,
weigh them on a balance and record them in a table as the previous mass. I will dab–dry them to
remove any excess water. When I start

Pros And Cons Of Reverse Osmosis
Thorough research on this task was used by investigating 14 different sites. These ranged between
obtaining definitions for hypotonic, hypertonic and istonic; researching osmosis in food processes,
finding out more about chemiosmosis, the pros and cons / advantages and disadvantages of reverse
osmosis, it's application and process. The idea behind the research was to prepare adequately before
doing the experiment and also to help understand the results and outcomes of the experiment and the
techniques used.
During this experiment I investigated the effect of various salt concentration on the rate of osmosis
in potatoes. I used five beakers with potatoes of the same size in each beaker, each beaker also
contained various salt concentrations. ... Show more content on Helpwriting.net ...
The solution with the most salt lost the most water in the shortest period of time. The potato in
distilled water absorbed water and therefore the mass of the potato increased. My hypothesis was
therefore incorrect.
Possible shortcomings of this investigation Having seen the results from this experiment if it were to
be done again I would increase the amount of salt in each cup but keep the same mass of potato
samples to obtain a faster, more dramatic and clearer result. Another option would be to rather place
the experiment in direct sunlight as opposed to indirect sunlight as the heat from direct sunlight
would speed up the reaction process. Replacing the water used with boiled water would also play a
part in speeding up the process of osmosis and subsequently the results obtained.
Implications of results of this investigation
In the event of there being a severe drought the only water resource available would be seawater.
Using seawater to irrigate crops would detrimentally affect the environment. The reason for this is
because the salt water removes the existing moisture from the soil and the nutrients from the crops,
the salt would then dry and in effect burn the crops in combination with the direct heat of the sun.
Therefore we could use reverse osmosis to remove the salt from the seawater to provide normal
`water to irrigate crops

Effect of Solute Concentration on Osmosis in Potato Cells...
INTRODUCTION
Osmosis is the movement of water molecules from high concentration to low concentration through
semipermeable membranes, caused by the difference in concentrations on the two sides of a
membrane (Rbowen, L.). It occurs in both animals and plants cells. In human bodies, the process of
osmosis is primarily found in the kidneys, in the glomerulus. In plants, osmosis is carried out
everywhere within the cells of the plant (World Book, 1997). This can be shown by an experiment
with potato and glucose/salt solution. The experiment requires putting a piece (or more) of potatoes
into glucose or salt solution to see the result of osmosis (a hypertonic type of solution is mostly used
as it would give the most prominent visual prove of ... Show more content on Helpwriting.net ...
6. Place each group of potato cylinders into each beakers.
7. Leave for 24 hours, with all of them staying together in the same place (not 3 beakers inside the
building and the other 3 outside, or similar situation) to keep the temperature roughly the same.
8. Use the plastic forceps to remove the potato cylinders from the beakers (keep them together in the
same group), and blot off the excess solution weight on them with the paper towels.
9. Weigh the mass of each group of potato cylinders and record data.
RESULT – (For graph, see Appendix 3)
Data: Effect of Solute Concentration on Osmosis in Potato Cells (for our group)
Solution Conc. Of Glucose (M) Initial Mass (g) Final Mass (g) Change of Mass (%) Class Average
0 4.5 5.3 17.8 17.5
0.2 4.3 4.5 4.7 5.6
0.4 4.2 3.9 –7.1 –6.7
0.6 4.5 3.3 –26.7 –25.8
0.8 4.1 2.7 –34.1 –30.1
1.0 4.4 2.8 –40.9 –35.5
Data: Effect of Solute Concentration on Osmosis in Potato Cells (for the 6 groups of our class) Mass
Changes In Potato–Groups For Each Solution (%)
Solution–Conc. Of Glucose (M) Group 1 Group 2 Group 3 Group 4 Group 5 Group 6 Class Average
0 17.8 11.9 8.4 22.2 14.1 17.5
0.2 4.7 4.8 4.8 5 13.6 5.6
0.4 –7.1 3.2 –2.5 –8 8.1 –6.7
0.6 –26.7 –10.9 –22.8 –28.8 –25.4 –25.8
0.8 –34.1 –16.4 –31.6 –41.7 –20.1 –30.1
1.0 –40.9 –19.4 –41.5 –45.1 –25.7 –35.5
EVALUATION

Discussion
The data shows that the higher the concentration of

Potato Osmosis Lab
Osmosis with Different Molar Solutions into Starchy Potatoes
Introduction: Osmosis is defined according to Kevin M. Bonney as the diffusion of water cells
through a semi–permeable membrane to the location where the there is a lower concentration of
water molecules (2014). Osmosis is a form of passive transport, which means that it does not take
any energy for these water molecules to diffuse across the membranes down the concentration
gradient (Krane, 2014). The phrase "down the concentration gradient" means going from an area of
high concentration to an area of low concentration (Krane, 2014). This lab takes us through the
process of osmosis, and shows us the end results of the process. Potatoes, highly starchy tubers, are
used to demonstrate ... Show more content on Helpwriting.net ...
The potatoes were much less concentrated with water than the molar solutions that they were put
into, so the water from the solution entered into the potato to even out the concentrations (Krane,
2014). My results were a bit different from what I expected, however. This could very well be as a
result of human error. I could've tried to cut the potato slices at more of the same mass in order to
control the experiment a little bit better and give equal amount of opportunity for the potato slices to
lose and gain water. This could have been a mistake that altered the results of the lab. This lab is
very important to life because it helps explain what happens in everyday life that we don't realize or
that we don't notice is happening. Cells in our body are a major component of osmosis, and all of
them go through a little bit of it every day (Bonney, 2014). It is much easier for water to pass
through semi–permeable membranes into the cells than other solutes such as NaCl, so this makes
osmosis a much more prevalent process than diffusion in some cases (Bonney,

What Is The Change In Mass Of Sucrose Osmosis
Change in mass of potatoes submerged in sucrose solution
Rebekah Schmitz
Introduction: Diffusion explains the passive movement of materials into and out of the cell due to
the presence of a concentration gradient from a high to low concentration across a membrane
(Choinski and Karafit 2015).
In this experiment, we studied the effects of differing concentrations of sucrose solutions on samples
of potato material over time. This experiment focused on the effects of tonic solutions such as
hypertonic and hypotonic solutions. When a cell is placed in a hypertonic solution, the cell will
shrink due to the water moving from a high concentration to low concentration, but when a cell is
placed in a hypotonic solution, the cell will swell due to the ... Show more content on
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When a hospital prepares an IV saline solution, they have to be careful to use to correct
concentration of sodium chloride. The blood needs to remain isotonic, so the red blood cells do not
shrink or swell. If the solution is simply water, then a concentration gradient is formed and
hemolysis occurs (Osmosis in Red Blood Cells, 2015). Hemolysis is defined as the destruction of
red blood cells which leads to the release of hemoglobin from within the red blood cells into the
blood plasma (Hemolysis). To further test our experiment, one could let the potato samples sit
longer in the sucrose solution to see if time effects the amount of sucrose solution absorbed.
Alternatively, changing other environmental parameters, such as temperature or pH, may have
different effects on the rate of

Osmosis Potato Lab Report Biology 4u Essay
Introduction
The movement of water molecules across a semi–permeable membrane is the process of osmosis. If
there is a solute and a solvent, each containing different concentration levels, then the water would
move along its concentration gradient until each side of the membrane are equal. The water moves
because the membrane is impermeable to the solute and the solute concentrations may differ on
either side of the membrane. Water molecules may move in and out of the cell, but there is no net
diffusion of water. Water will move in one direction or the other, and this is determined by the solute
or solvents concentration levels. If the two solutions are of equal concentrations, they will be
isotonic. If the concentrations are unequal, the ... Show more content on Helpwriting.net ...
Percentage Change in Mass
(Final Mass – Initial Mass ÷ Initial Mass × 100) ex. Test tube 1, 0 mol/L solute concentration: 1.6 –
1.3 ÷ 1.3 × 100 = 23.08%
Results and Observations Test Tube # | Solute Concentration (mol/L–1) | Initial MassI (g) | Final
MassF (g) | Change in Mass(F – I) (g) | Percent Change in Mass(F – I) × 100 I | 1 | 0 | 1.3g | 1.6g |
0.3g | 23.08% | 2 | 0.2 | 1.1g | 1.1g | 0.0g | 0.00% | 3 | 0.4 | 1.2g | 1.0g | – 0.2g | – 16.67% | 4 | 0.6 |
1.5g | 1.2g | – 0.3g | – 20.00% | 5 | 0.8 | 1.5g | 1.1g | – 0.4g | – 26.67% | 6 | 1.0 | 1.6g | 1.3g | – 0.3g | –
18.75% |
Figure 1.2: Data Table of Results After 24H in Solute Concentration
Figure 1.2: Data Table of Results After 24H in Solute Concentration
Figure 1.3: Graph of Results After 24H in Solute Concentration
Figure 1.3: Graph of Results After 24H in Solute Concentration
As we can see in Figure's 1.2 and 1.3, when there was no sucrose solution, the potato increased in
weight. This is due to the fact that the sucrose solution was hypertonic in comparison to the potato
slice. Through osmosis, the solution moved along the concentration gradient and into the potato
slice making it hypotonic. When there were higher concentrations of sucrose solution, the potato
decreased in weight. This is due to the fact that the potato was hypertonic in comparison to the
potato. Through osmosis, sucrose from the potato moved along the concentration gradient out and
into

AP Bio Osmosis and Diffusion lab
Diffusion and Osmosis Lab Introduction: 1) The relationship between the rate of diffusion, volume
and surface area is that the surface area of a subject somewhat correlates with the volume of the
object. When the surface area and volume are set up as a ratio, this gives a good idea as to how fast
the rate of diffusion will be. The higher surface area to volume ratio, the faster the rate of diffusion.
This is because then there is more surfaces to diffuse through and there materials to diffuse, the rate
of diffusion is a lot faster. Conversely, when there is a smaller surface area for more molecules to
diffuse through, the rate of diffusion will be lower. 2) A few different dialysis tubes, which are semi
permeable, will represent a ... Show more content on Helpwriting.net ...
The higher the water potential in one location compared to another location, will cause the water
and molecules to move from the high potential to the low water potential. Lab Design Control: The
cell and its extracellular environment Independent Variable: The cell and its volume, surface area,
and the water potential of the internal cell and its environment Dependant Variable: The effects rate
of diffusion/and or osmosis Repeated Trials: In procedure one, we tested diffusion on different sized
cell models (gelatin with various volume and surface area wise). In procedure two, we tested cell
models in different internal environments and similar external environments to find the effects on
rate of osmosis. In procedure three, we used potato cells in different concentrated sucrose
environments to test the effects on water potential on cells and osmosis. Conclusion: 1. The
relationship between rate of diffusion/ osmosis, volume, and surface area can be easily seen and
analyzed through the data that was collected from procedure one: Surface Area and Cell Size.
Phenolphthalein is a dye–material in this lab that was used to determine whether a substance was an
acid or base. This could be told as the phenolphthalein changed into a murky. Muddled and clouded
color when mixed with acids. When the chemical aid was mixed in with a base, the color

Effect of Sucrose Solution on Osmosis Essays
Effect of Sucrose Solution on Osmosis
Aim: The aim of the experiment is to show how varying the concentration of sucrose solution
affects osmosis by changing different molar solutions of sucrose and water and how it affects the
potato. Introduction: In this investigation I will be exploring the effect of varying concentration of
sucrose sugar solution on the amount of activity between the solution and the potatoes.
Osmosis is the movement of water molecules across a partially permeable membrane from a high
water concentration to a low water concentration. Osmosis can be effected different things such as:
– Temperature – The warmer the solution, the quicker the osmosis will go. This is because the water
... Show more content on Helpwriting.net ...
The potato cells, took in, or gave out the water depending on the concentration of the solution it is
surrounded in.
The results were fine and by looking at the mass measured before the experiment, you can see that
there is no reading which seems to be out of the line. As the weights before the experiment range
between 2.31g and 2.46g, this tells us that the potato pieces were cut well, and I believe accurate
enough.
The results show that:
– Osmosis actually took place in the experiment.
– As the sucrose solution increased, the mass decreased, and as the sucrose solution decreased, the
mass increased
Evaluation: I followed the plan correctly; I believe I gained accurate and sufficient enough results to
conclude the experiment, and to prove my prediction.
To make this experiment better, I believe that I could have done more than one experiments to see if
anything has gone wrong, but since

Osmosis In Potato Cells
The hypothesis tested was "as the concentration of the sodium chloride solution increases, the
change in mass of the potato cylinders will decrease, from gaining to losing mass, allowing the
isotonic point of the potato cells to be found" which was supported by both the group and class
results. These results showed that increasing the sodium chloride solution concentration allowed it
to approach the isotonic point and then surpass it when the solution became hypertonic and the net
movement of water was out of the potato cells.
The graph is indicative of when the potato was in a hypotonic solution (above the x–axis) there was
a net movement of water into the potato cell resulting in an increase in mass. The opposite is true of
hypertonic solutions (below the x–axis) resulting in a decrease in mass. Where the graph crossed the
x–axis is where the potato cells isotonic point is, this is where the external solution has the same
concentrations as the internal cell cytoplasm
Osmosis is a process by which water moves through a partially permeable membrane down a
concentration gradient. As this net movement of water occurs from high to low concentrations it is a
passive process and therefore does not require energy to occur. There are three types of solutions
that a cell can be in, in relation to which direction osmosis will occur. In hypertonic solutions, there
is a higher osmotic concentration than in the cell's cytoplasm, so plasmolysis occurs. This is where
water moves out

Essay Experiment to Investigate Osmosis in Potatoes
Experiment to Investigate Osmosis in Potatoes
The aim of this experiment is to investigate the movement of water in and out of plant cells. The
cells chosen for study will be taken from potato tubers. Firstly I will explain what osmosis is.
Osmosis is the passage of water from a region of high water concentration through a semi permeable
membrane to a region of low water concentration. This definition contains three important
statements:
a) It is the passage of water through a semi permeable membrane
b) It is the passage of water from a region of high water concentration
c) It is the passage of water to a region of low water concentration.
All the above statements are included in the definition, but define
certain ... Show more content on Helpwriting.net ...
Transpiration pulls water up the plant stem but osmosis is the process whereby water is drawn into
or out of cells and tissues. Osmosis is the flow of water by diffusion through a differentially
permeable membrane from areas of high water concentration to regions of low water concentration.
The diagram below illustrates this:
Water can freely penetrate all membrane. The cellulose cell wall does not act as a semi permeable
membrane and will allow most substances that are dissolved in water to freely pass through it.
Whether water enters the cell by osmosis or not will depend on the balance between external and
internal solute concentrations and the state of the cell. If the solutions on each side of the
differentially permeable membrane are equally concentrated then there will be no net movement of
water across the membrane. This is called an equilibrium state and the solutions are referred to as
being isotonic. A solution that contains more solute particles than another, and is hence more
concentrated, is referred to as being hypertonic. The less concentrated solution is hypotonic. This
concentration of solute particles is usually described as a molarity.
Even if the solute concentration external to the cell is hypotonic to the vacuole contents the cell will
not continue to take in water by osmosis for ever. The cellulose cell wall provides a rigid barrier to
uncontrolled expansion. A cell that is full of water

Osmosis in Potatoes
How is Osmosis Affected By the Concentration
PLANNING
Independent Variable
The independent variable in this experiment is the thing that I will be changing in the experiment.
This is the range of concentrations that have been obtained by diluting the original 1M solution of
Sucrose. This is therefore the only thing that is going to be altered as I am investigating how
different percentage of water molecules affects the weight of the the potato thus the rate and
direction of osmosis.
Dependant Variable
The dependant variable will be the mass of the potato as this is the variable I will be measuring.
From this I can see the change in mass(g) and so work out the amount of water that has moved and
the rate of the osmosis in a ... Show more content on Helpwriting.net ...
To makes sure that this does happen and that the controlled variables are controlled I will be doing a
second test to ensure that the results are reliable.
[pic]
| |(Sample of Potato) Change in Length/mm |
CONCENTRATION / M |1 |2 |3 |mean | |0.0 |50 |52 |54 |52 | |0.2 |50

Potato Cubes Mass Lab Report
How will Salient, Glucose, and a Mixture of the two Affect a Potato's Mass?
Samson Malcolm Fratello
Suncoast High School
Design
Title:
How will Salient, Glucose, and a Mixture of the two Affect a Potato's Mass? 2. Research Question:
How will a potato cube's mass change if put in a mixture of Glucose and Salient together vs a potato
cube just being put into a solution with Glucose or Salient. 3. Background Information:
Diffusion is where particles move from areas of higher concentration to areas of lower
concentration. Osmosis is the diffusion of water. Glucose (sugar) will not diffuse as much as Salient
because there is already sugar inside of the potato so not as much water be affected by diffusion.
Salient ... Show more content on Helpwriting.net ...
Potato Cube Size–The cubes should be 2.54 centimeters by 2.54 centimeters by 2.54 centimeters. 7.
Materials:
–1 Potato
–1 Knife
–1 Spoon
–1 Balance
–4 Red Cups
–32oz of water
–150 Milliliters of 1M of Salient Solution
–150 Milliliters of 1M of Glucose Solution
–Timer
8.Method
Cut 4 cubes out of a potato.
Find the mass of each cube.
Fill the 4 cups with 8oz of water each.
Mix 100 Milliliters of Salient Solution into one cup of water, 100 Milliliters of Glucose Solution in
another, and put 50 Milliliters of Salient Solution and 50 Milliliters of Glucose Solution in another
and mix it.
Put a cube in each cup and take out after five minutes.
Calculate the new mass of each cube.
Put back in.
Repeat step 5–7 three more times so that the cubes were submerged for 20 minutes in total.

Record all findings.
II.Data Collection and Processing
Raw Data: Qualitative Data–
All of the potatoes remained very much the same. The potato cubes darkened a bit along with
growing a bit but beside that the potato cubes remained very much the same. However this partially
is because of the fact that the solutions were diluted in the water. And as research shows when the
potato cubes are dipped into water they maintain a similar look.
Quantitative Data–
The numbers in the charts are mass in grams. The experiment is over a twenty minute trial.
Water
Glucose
Salient
Mix
Initial

Osmosis lab/ concentrations of solutions effect on...
"Do different concentrations of solutions determine the mass of a potato?"
Introduction:
The way to get the full results of this lab was through the process of osmosis. Osmosis is the
movement of water across a membrane into a more concentrated solution to reach an equilibrium.
When regarding cells osmosis has three different terms that are used to describe their concentration.
The first of these words is isotonic. Cells in an isotonic solution show that the water has no net
movement and the amount of water that goes in is the same that goes out. Isotonic comes from the
root iso, which means equal. This makes sense because the definition of isotonic is: same
concentration. The second out of three words is hypotonic. Cells in a hypotonic ... Show more
The dependent variable in the experiment was the percent change in mass and the independent
variable was the solution. This is a quantitative experiment because it was measuring the percent
change in the mass of the potatoes.
Results:
Data:
The chart below shows the % change in mass after being in their concentrated solutions:
Next Page (didn't fit)
Concentration (M)0m.2m.4m.6m.8m1m
Initial Mass(g)3.6g3.8g3.9g3.1g3.0g3.0g
Final Mass (g)4.1g3.9g3.4g2.2g2.0g1.9g
% Change in Mass14.9%1.8%–12.1%–28.6%–33.3%–36.9%
Analysis:
The Graphs below show the percent changes in mass for both the class averages and our group's

averages:
Conclusion:
In conclusion when the molarity level was at 0 and at .2 the potatoes had gained mass so therefore
they were placed in a hypotonic environments. When the molarity level was .4 and above the
potatoes loss mass so therefore they were placed in hypertonic environments. So the different in
concentrations does change the mass of the potatoes because they determine the osmosis
environments.
Discussion:
The hypothesis for this experiment was that at 0m and at .2m the potato core was going to swell
making the surroundings it was in hypotonic. For .4m it was stated that the potato core would stay
the same, making the surroundings it was in isotonic. For that last three solutions, .6m, .8m, and 1m,
it was thought that they would shrink, so that would mean that that the environment that they were
placed in was hypertonic. Although these

How Does Salt Concentration Affect The Rate Of Osmosis In...
In this experiment I am looking at what the effect of various salt concentrations will have on the rate
of osmosis in potatoes. Osmosis is the movement of water molecules from a high water potential to
a low water potential through a semi–permeable membrane. All cells have semi–permeable
membranes which means that it only allows certain substances in and out of the cell. Many factors
effect the rate of osmosis, this includes temperature and the amount of salt added.
I think that when the potatoe is placed in a salt concentration where the water potential is greater the
potatoe molecules will move from the potatoe to the salt and a decrease in the mass will happen. The
more salt there is in the water the fresher the potatoe will stay. The ... Show more content on
Helpwriting.net ...
There are 3 different types of osmosis, they are called hypertonic, hypotonic and isotonic.
Hypertonic is when water spreads out of the cell, making the cell shrink. Hypotonic is when water
moves into the cell causing the cell to swell or burst. Isotonic allows water to go in and out of the
cell but the cell does not shrink nor swell or burst. Pros and cons around osmosis: The pros around
osmosis are the water is outstanding and very clean, it is at a very low cost, the water tastes better
therefore you would want water instead of cola and food tastes much better. The cons around
osmosis are the clogging in the taps, filter replacement and it is a very slow process A filtration
system is an ideal environmental condition for optimal osmosis. The filtration will remove the solid
particles out of the water, so that you can drink clear, clean water. This process purifies water
making it taste better. Water purifiers can be put into homes making it better to drink

Diffusion And Osmosis Of Potato Cores
Diffusion and Osmosis in Potato Cores By Brittany Pangilinan Abstract Van't Hoff's Law suggests
that the osmotic potential of a cell is proportional to the concentration of solute particles in a
solution. The purpose of this experiment was to determine if there are any differences between the
osmolalities, the no–weight–changes of osmolalities, and the water potentials of potato cores in
different solutions of different solutes. The percent weight change of the potato cores was calculated
through a "change in weight" method. The potato core's weight was measured before and after they
were put into different concentrations of a solute for 1.5 hours. In our experiment, there were no
significant differences from the osmotic potentials of our results and the osmotic potentials of other
scientists work. Ending with chi square values of 2.17 and 2.71, and p values of 0.256 and 0.337,
concluding that there is no difference in water potentials of potato cores in different solutions of
different solutes at varying concentrations. Introduction Water potential is the measure of potential
energy in water, or the difference in potential energy between a water sample and pure water.
According to Kosinski (2015), white potatoes are an experimentally favorite subject for the
determination of water potential in plant tissue. In our lab we use a procedure called "change in
weight" method, which was published by Meyer and Anderson in 1935. Where we use potato cores
to explain and show

How To Write A Lab Report On Osmosis And Diffusion
One experiment was conducted for this lab report on osmosis and diffusion and how the
concentrations effect a cell. The lab consisted of weighing 4 potato cylinders and putting them into 4
cups with different levels of sucrose solution. After incubating for two hours the potatoes were
weighed again and the data was collected. The results showed two increasing, one staying the same,
and one decreasing in mass.
Osmosis is when water moves across cell membranes until both sides are balanced (Campbell 107).
Diffusion is when particles spread out resulting in equilibrium (Campbell 105). Osmosis and
diffusion is constantly happening throughout our cell membranes keeping us healthy by diluting
particles in high concentration. The cell membrane, made up of a phospholipid bilayer, helps
regulate what particles can get in and out. Since water is the only molecule moving throughout
theses experiments, osmosis is what's being tested. Because of this, when a potato cylinder is placed
into sucrose solutions of varying concentrations, the potato's mass will ... Show more content on
Helpwriting.net ...
Each potato should be cut to be as exact in length as possible (5 cm). Weigh each individual potato
before placing them into individual cups with different solutions (100mL), with each cup being
correctly labeled. As soon as the potatoes are in the cups, a timer should begin to ensure incubation
is complete. Cups should be picked up and swirled every 10 to 15 minutes as they incubate. Once
1.5 to 2 hours has passed, the potatoes need to be removed and weighed. Record the results and
repeat until each potato is weighed and measured. To calculate the data the formula weight = weight
change/ initial weight X 100 is

Osmosis in Potatoes
AT1– Osmosis In Potatoes
Aim: Investigate the movement of osmosis through a selectively permeable membrane, in this case
potato.
Introduction: Osmosis is the movement of water through a semi permeable membrane, separating
solutions of different concentrations. The water passes from a region of high concentration to a
region of low concentration, until the two concentrations are equal in concentrations of water.
Many cell membranes behave as semi permeable membranes, and osmosis is a vital mechanism in
the transport of fluids in living organisms, for example, in the transport of water from the soil to the
roots in plants.
If a cell is in contact with a solution of lower water concentration than its own contents, ... Show
more content on Helpwriting.net ...
Graph 2 shows the average change in length. Basically, the pattern is the same as average weight
loss in graph 1. It shows how osmosis is affected by different concentrations.
Method After having done our preliminary work, we knew exactly which measurements we needed
to use in order to obtain the correct sort of results. We set up 14 test tubes, because in order to save
time, we intended on doing repeats at the same time as the original experiments were going on.
For organisation's sake, we set up all of the test tubes at once, and labelled them individually to
avoid confusion later on. Into each test tube, we poured 15mls of Glucose solution, and added one of
the potato chips, each weighing around 1 gram, and measuring 33mm by 5mm. In order to make it
as much of a fair test as possible, we added the potato chips very quickly, to make sure one chip
didn't have a longer amount of time in the solution than another. We then left each one for 30
minutes.
After 30 minutes, we emptied each test tube, leaving only the potato chips inside. Before we
measured and weighed each chip, we dabbed them with paper towel. If we had of left excess water
on the chips, the weights would not be accurate. We then measured the chips in mms because they
are a more accurate

Essay Osmosis Experiment
Background Knowledge:
Osmosis definition:
Diffusion of water molecules through a semi permeable membrane from a higher concentration to a
lower concentration until the concentration on both sides is equal.
Osmosis in animal cells:
The cell membrane is the partially permeable membrane in animal cells. If the cells were placed in
distilled water they gain water, swell and burst. This is known as haemolysis.
Osmosis in plant cells:
The cellulose cell wall of plant cells is fully permeable. Therefore it's the cell membrane of a plant
cell which acts as the semi–permeable membrane, deciding what gets into and out of the cell.
When plant cells are placed in water the following happens:
Water enters the cell, the reason is that ... Show more content on Helpwriting.net ...
The amount of water lost from the cell depends on the concentration of the solution in which it was
placed. If only a small amount of water is lost the cell cannot remain turgid and wilting of the plant
occurs. Cells which aren't turgid are described as being flaccid.
If a plant cell looses too much water by osmosis, plasmolysis results. The permanent vacuole
shrinks in size as it loses water and the cell membrane pulls away from the cell wall.
Active uptake: Plants require a range of mineral ions for normal development. Ions such as nitrates
and magnesium are absorbed by the plant from the soil. This absorption takes place in the root hair
cells that form the outer layer of the plant roots. In most soils there are more of these ions in the root
hair cells than these are in the surrounding soil.
Method:
Using a cork borer cut out the middle of both carrots and potatoes, cut both the carrots and potatoes
the same length and size and measure them with a ruler to make sure, then weigh them. Using only
the core of both will make the experiment fair.
Starting with the carrots, add the first amount of concentrated sugar solution (which is distilled
water) and repeat this another 2 times.
Then do the same for all 6

Essay on Osmosis
Osmosis
Introduction
I obtained my scientific knowledge from the "AQA science: double award modular." This is an
experiment that will explore the osmosis theory
To make this experiment safe I will wear goggles to protect my eyes and also will make sure that
when using the borer to cut the potato I have a white tile underneath.
The experiment will be a fair test as I will keep the weight of the cut potato the same throughout the
water and sugar solutions. I will try to keep the potatoes surface area and volume the same. I will
make sure that both pieces of potato are placed in their solutions at the same time and pulled out
together. I will make the weight of the potatoes the same by ... Show more content on
Helpwriting.net ...
Example:
[IMAGE][IMAGE][IMAGE][IMAGE][IMAGE][IMAGE]In the root–hair cell of a plant the
surrounding soil will have a more concentrated water solution than inside the cell, thus leading to
the water solution in the soil osmosing into the root–hair cell. The cell which is next to the root hair
cell is separated by the partially permeable membrane. This leads to the more concentrated water
solution in the root hair cell osmosing into the cell next to it. This procedure of osmosis through the
cells carries on until the cells reach the xylem. The xylem finally carries the water solution upwards
to the areas that need it.
I have decided to vary the amount of sugar solution (%) in which the potato chip is placed in. I am
using this variable as I think it will give a good range of results because unlike changing the size of
the potato this should prove that the theory of higher concentration to a lower concentration is right.
To ensure accuracy I will use equipment such as the top pan balance to measure the weight of the
potatoes accurately. I will also use a pipette to measure the about of solution I put into the test tubes.
The drop sizes of the solution vary so I will try and keep them roughly the same size but there
possible could be some inaccuracy located. I will use a borer to cut parts of the potato and a white
tile

Potato Osmosis Lab
Osmosis Lab
By Anthony Grimes
3/2/17
Per 2.
Abstract
What is being tested in this lab is the properties of osmosis and its hypertonic ( water coming out of
the cell), isotonic (everything is normal), and hypotonic (water going into the cell). What is being
tested is eggs and potato slices so we can test plant and animal cells for the best results. For the
results what was predicted was The eggs (the animal cell) will lose the outer shell and in the distilled
water water will enter the egg and it will swell up and in the corn syrup water should heave the egg
and in the egg white is should stay the same. And in the potato slices with no salt in the water water
should go in and as we go from 5% to 10% to 15% more and more water should ... Show more
And the opposed brought water in.
Conclusion
The lab was a success we were able to show that osmosis is a thing and how it works in side of plant
and animal cells, The potatoes and the egg did what was supposed to happen as more and more salt
came into the solution the more water was pulled out of the cell and reversed and they were gaining
water and adding and lose 20 to 30 g of water weight because of osmosis. If there is more salt in the
solution then there will be more and more water pulled out of it. And this was 100% true because
that is what happened during the lab. What we could have changed is pre soaking the potatoes and
the eggs before the lab because that was an error the first time. And if i were to do anything
differently i would have tried different solutions to see what would happen. And I would have
different animal and plant

The Chemistry Of Diffusion Of Osmosis
Diffusion is the random movement of particles, caused by kinetic energy, from an area of higher
concentration to an area of lower concentration. Once the two substances are in equilibrium,
diffusion still occurs. However, the substances stay in equilibrium, as the random movement is equal
across both sides. Osmosis is the diffusion of water, through a selectively permeable membrane. A
selectively permeable membrane is a membrane that allows certain molecules to pass through itself,
and is resistant to other molecules. Osmosis is a very important process by cells, with uses such as
the absorption of water. Many cells are placed in solutions with a similar solute–solvent ratio, to
prevent rapid intake or expulsion of water. Osmosis causes a change in turgor pressure, and in
osmotic pressure. Tugor pressure is the pressure exerted on the cytoplasm on the cell caused by the
intake or expulsion of water. Osmotic pressure is the pressure of the water If the turgor pressure in a
cell is too great, than the cell may explode. If the turgor pressure inside the cell is too low, the cell
will shrivel. Potatoes are vegetables that are grown under the surface of the dirt. Potatoes are
commonly cooked for consumption. Some common foods that are made from potatoes are; mashed
potatoes, french fries, and some kinds of chips. Potatoes are grown in one–hundred twenty five
countries. If eaten raw, potatoes can cause sickness as they may be poisonous. Potatoes are made

Osmosis Lab Report
The Effects of Solute Concentration on Osmosis
Introduction:
Diffusion is the movement of certain molecules toward the direction of equilibrium, and is an
important process in eukaryotic and prokaryotic cells. Osmosis is a specific type of diffusion that
refers to the diffusion of water, which is an important factor in many types of cells without cell walls
because the water potential of a cell must be similar or equal to its environment in order for the cell
to function properly. In cells, a semi permeable membrane regulates the diffusion of certain
molecules, selectively allowing substances to travel inside and outside of the cell and its organelles.
Dialysis bags are used to imitate the structure of cell membranes. They are also semi–permeable,
allowing water molecules to flow through while blocking larger sucrose molecules. Potato cell
membranes act similarly, allowing water to enter and exit but not facilitating the movement of
sucrose molecules. Because of this, the concentration of sucrose in the environment of a cell
membrane or in a dialysis bag will affect the direction of net water movement by changing the
amount of free water available for osmosis. Water potential is determined by the concentration of
sucrose within the membrane and its aqueous environment. The dialysis tubing experiment will test
the effect that different concentrations of sucrose within the semi–permeable membrane will have on
the net direction of water diffusion. The solutions within the

Osmosis Lab Report
Measuring Osmosis: Potato Cores
Introduction: The purpose of this experiment was to understand what osmosis is and to be able to
measure it. Osmosis is the movement of water and the water moves from area with high
concentration to an area with low concentration. During that lab potatoes were cut up to a of total of
four pieces of potato per cup, with a total of six cups and twenty–four pieces of potato. Then the
cups with the potatoes are filled with different amounts of sucrose concentration; 0%, 4%, 8%, 12%,
16%, and 20%. The hypothesis of the lab was if the potatoes mass were to increase then the amount
of sucrose sugar would increase as well.
Materials:
6 plastic cups
Potatoes
Razor blade
Marker
Ruler
Balance
Cutting Board
Rubber bands

Potato Osmosis Lab
Introduction
Osmosis involves the movement of water molecules from an area with more pure water to an area
that has less pure water. The water molecules must pass through a membrane. The goal is for the
water to be equally dispersed throughout. There are different types of solutions that osmosis may
take place in. Things such as temperature, light and surface area will affect how optimally the
osmosis process will work. Reverse osmosis can be used to create systems that purify water. It can
also be used to produce and preserve different foods.
Literature research:
What is osmosis?
Osmosis is the movement of water molecules from an area with a high water potential to an area
with a low water potential, through a selectively permeable ... Show more content on
Helpwriting.net ...
The potato slowly sank to the bottom of the glass. For the first 2 hours the weight of the potato did
not change . in the third hour it lost 1 gram . This means a bit of water left the potato. There was no
obvious visual evidence of this change.
Glass C: In beaker C 20 grams of salt was added. The potato floated to the top.in the first hour the
potato did not change in the second hour it lost 1 gram and in the third hour it lost another 2 grams.
This means water left the potato. There was no obvious visual evidence of this change.
Glass D: In beaker D 30 grams of salt was added. The potato floated to the top. In the first hour the
potato lost one gram, in the second hour another 1 and in the third hour another 2 grams to become
in the end 44 grams. This means that water left the potato. You can see the slight decrease in size of
the potato and the skin became slightly wrinkled.
Glass E: in beaker E 40 grams of salt was added. The potato floated to the top . In the first hour the
potato lost 2 grams, in the second hour it stayed the same and in the third hour it lost 3 grams. This
means the potato lost a lot more water then the others. The skin of the potato became very wrinkled
and you could see a decrease in the potatoes

The Effect Of Water On Concentration On The Concentration
Abstract:
The main purpose of the experiment was to test the idea that water would move from the higher
concentration to the lower concentration. In order to test this theory, we placed potato slices in 7
different containers, each containing different concentrations of NaCl, to measure the weight change
from osmosis. The containers ranged from 0M NaCl all the way to .6M NaCl. We measured the
potato slices before and after placing the slices in the solutions and recorded the net change in
weight to determine the tonicity of the potato cells. Our results showed that the potato slices put in a
NaCl solution of .2M or higher lost weight and the potato slices put in a NaCl solution of .1M or
lower gained weight. This shows that the osmolarity of the potato falls within the range of .1M to
.2M, and it also proves the process of Osmosis by having the higher concentration move to the
lower concentration. In addition to this, it can be concluded that the osmolarity of cells can be
determined by observing the affects of osmosis.
Introduction:
Osmosis can be defined as the force that drives the movement of water due to differences in solute
concentration. The process involves the random movement of molecular water molecules through a
semi–permeable membrane from regions of higher concentration to regions of lower concentration
until both regions equal out (Ledbetter 2013, Ness 2013). Polar substances such as glucose and salts
cannot travel through the cell membrane, which

Osmosis Paper

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Osmosis Paper