Osmosis Experiment Essay

2262 words - 9 pages

Osmosis Experiment



The main subject that I will be planning to investigate is the effects
of a concentrated sucrose solution on potato cells on the basis of the
Osmosis theory.

Background knowledge:

The plant cell and its structure

To understand osmosis in detail I will need to explain the plant cell
(which is the cell included in the osmosis experiment) and its cell
membrane. Below I have a diagram of a plant cell:


Osmosis is about the movement of particles from a higher concentrated
solution to a lower concentrated solution to create an ethical balance
via a partially or semi permeable cell membrane. Osmosis in simple
terms is the exchange of particles between the cytoplasm inside the
cell and the solution outside the cell. What makes
this exhange is the partially permable cell membrane. This cell
membrane plays an important part in Diffusion.

Cell membrane and Diffusion

Diffusion is the movement of the molecules of gas or liquids from a
higher concentrated region to a lower concentration through the
partially permeable cell membrane along a concentraion gradient. This
explanation is in the diagram shown below:



When a plant cell is placed in a dilute solution or a less
concentrated solution then the water particles pass through the
partially permeable membrane and fill the cell up with water. The cell
then becomes Turgor or hard. An example of this is a strong
well-watered plant.


However when the plant cell is placed in a more concentrated solution
the water inside the cell passes out the cell. The cytoplasm then
pulls away from the cell wall and the cell becomes flaccid or limp.
The cell would be described as plasmolysed. An example of this would
be a wilting plant without any water.

Active transport

There are times when the substance moves from the low concentrated
region to the high concentrated region. This is called Active
transport and also takes up more energy than usual diffusion.

Method of experiment

It would be more accurate to explain the apparatus and then relating
to the method of the experiment, how the actual apparatus is used in
the experiment.


· 6 potatoes

· 6 beakers

· Pure distilled water

· Metal clamp, or stand

· Pieces of string

· Potato cutter or alternatively a Stanley knife

· Weighing scale

· Measuring cylinder

· Stop watch or any other instrument to record time

· Mixing tool, such as a spatula or metal piece etc

· Sugar

· Safety specs

The experiment is to investigate in osmosis, I will be using 6
potatoes solely for the purpose of keeping the experiment more
accurate, the potatoes will be placed over 6 beakers, each of these
beakers shall...

Find Another Essay On Osmosis Experiment

Biology experiment on osmosis for gcse very good got an A* as course work so do not miss out

3762 words - 15 pages experiment six petri dishes were used each with five 4 cm core-bored pieces of potato. As evidence of osmosis occurring I used the difference of weight before (after being blotted for six minutes) and after being in the salt solution. The control is five core-bored potatoes in a distilled water solution. Here nothing anomalous should occur. To make the results valuable the experiment is replicated five times in each petri dish. Any anomalous results in

Lab Report: Concentration of Sucrose Affect on Osmosis

1499 words - 6 pages would be more area exposed for osmosis to take place. The concentration of the solution will affect osmosis, the higher the concentration the less osmosis would take place. The duration of the experiment also affects how much water is gained/lost by osmosis as the longer the duration is, the more osmosis would take place (osmosis would stop as soon as it reaches an equilibrium of water content inside and outside the cell. I will only change

Osmosis Investigation

2093 words - 8 pages lower concentrations and loose less in the higher concentrations than a potato with a low sucrose concentration, creating different results) Volume of solution,(Because if a chip were put in a smaller volume of solution, then the number of water molecules would be smaller and less osmosis could take place) Light levels falling on experiment,(Increased light levels falling on the experiment could increase temperature


787 words - 3 pages pressure have different water potentials.Surface area- the larger the surface area, the more water can be absorbed into the cells, therefore altering the rate of osmosis.In this experiment we wanted to show how the concentration of salt affects the rate of osmosis.HypothesisAs the concentration of salt solution is increased, the rate of osmosis increases.AimMy aim was to find out if the rate of osmosis increases with concentration of salt

Investigating Osmosis Using Potato Cylinders

1105 words - 4 pages Investigating Osmosis Using Potato Cylinders The aim of this investigation is to see how the sugar concentration of a solution eventually affects the size of a submerged potato cylinder. I am conducting this experiment to further my understanding of osmosis. The increase or decrease of the size of the potato cylinder can be explained by osmosis. Introduction:- The core scientific principle, related to my

Lab Report: Osmosis

4385 words - 18 pages 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

egg experiment research project

1630 words - 7 pages ). Data are primarily actual photos and numerical quantities that are measured in this experiment. Also, graphs are made available for a pictorial representation of numerical data as well as descriptive observations on actual outcome of the experiment. Phenomena of each step are discussed and explained based on researches made on some keywords such as chemical reaction, acid/base, osmosis, diffusion, concentration gradient, hypertonic, hypotonic

The Effect of Different Strength of Salt Solutions on Potato Cells Through Osmosis

3013 words - 12 pages The Effect of Different Strength of Salt Solutions on Potato Cells Through Osmosis An Investigation to find out how different strengths of salt solution affect potato cells through osmosis. Aim I aim to investigate the effect of different concentrations of salt solution on potato cells when osmosis occurs. Introduction I intent to set up this experiment using equally sized cylinders of potato submerged

Investigation into osmosis in potato cells.

2140 words - 9 pages the glucose in the solution, keeping the others the same and ensuring only one variable is changed. However I can't control the temperature, as we will not be working in a thermostat-controlled environment. I don't think this will matter because although I don't know whether temperature affects osmosis, the experiment will only take place once, and all the specimen bottles will be kept together so any temperature changes will be the same for all

Which Sugar Concentration Osmosis Best Takes Place on a Potato Chip

2635 words - 11 pages experiment I am going to do all the experiments at room temperature. Another variable will be the type of membrane used in the investigation. This is because different membranes have different properties, such as different sized holes. A change in membrane can cause the process of osmosis to lengthen or to not function properly. An additional variable which could affect the experiment is the type or age of the

An investigation of the glucose concentration of the cell sap in potato cells

4213 words - 17 pages An investigation of the glucose concentration of the cell sap in potato cells In this experiment I intend to investigate the effects of osmosis on potato cells. Specifically, I intend to use my knowledge of osmosis to investigate the glucose concentration of the cell sap in potato cells. Osmosis is a method by which water levels on either side of a semi permeable membrane may balance themselves. It occurs between regions of high water

Similar Essays

Osmosis Experiment Essay

3904 words - 16 pages Osmosis Experiment Experiment to investigate how equal masses of potato are effected in different concentrations of 1molar sucrose soloution. Aim: To investigate if osmosis occurs in potatoes, and if so, how it affects potatos of equal mass (2.5g) in different molar solutions of sucrose and water. Apparatus: -Cutting tile which will be used to cut

Osmosis Experiment Essay

529 words - 2 pages 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

Osmosis Experiment Essay

2801 words - 11 pages Osmosis Experiment Planning Introduction Osmosis is the passage of water molecules from a weaker solution into a stronger solution, through a partially permeable membrane. In this case, the tiny holes in the membrane of the potatoes will allow the water molecules to pass through in and out of the solution and the potato, depending

"Experiment To Investigate The Effect Of Osmosis In Potatoes" A Gcse Experiment Looking At The Effects Of The Concentration Of Sucrose Solution On Osmosis In Potato Tubers.

2796 words - 11 pages Experiment to Investigate Osmosis in PotatoesThe 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