Osmosis in Potato Tubes


Length: 754 words (2.2 double-spaced pages)
Rating: Excellent
Open Document
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Text Preview

More ↓

Continue reading...

Open Document

Osmosis in Potato Tubes

Osmosis:

Osmosis is the movement of water molecules through a semi-permeable
membrane from a high concentration to a low concentration.

Diagram:

[IMAGE]

[IMAGE]

Aim:

To see the effects of different concentration of sugar solution on
Osmosis in potato tubes.

Key factor:

In the investigation we change the sugar solution from:
0%-10%-20%-30%-40%-50% this is the independent variable; the dependant
variable is the change in mass.

Prediction:

I predict that all the potato tubes in pure water or low concentration
sugar solution will swell because water enters their cells by osmosis.
The potato tubes in higher concentration sugar solution will shrink
because water leaves their cells due to osmosis.

Equipment list:

* Cork borer

* Potato

* Sugar solutions – 0%, 10%, 20%, 30%, 40%, 50%.

* 6 Test tubes

* Test tube rack

* Scalpel

* Stopwatch

* Measuring cylinder

Fair test:

To make our experiment a fair test me need the same:

* Lengths of potatoes.

* Amount of sugar solution in each test tube.

* The potatoes have to have the same mass.

* Size of potatoes

* Diameter of each potato tube

* Time in sugar solution

We need to make sure in both experiments the fair test lists are used
and the procedures are carried out. This needs to be done otherwise my
results will not be accurate and will look odd.

Method:

Firstly we got out all our equipment. We then cut our potato tubes
with the cork borer and cut them with the scalpel so they were the
same length and weighed them. We then put one potato tube in each test
tube and then added the same amount sugar solution in to each tube.

How to Cite this Page

MLA Citation:
"Osmosis in Potato Tubes." 123HelpMe.com. 21 Sep 2017
    <http://www.123HelpMe.com/view.asp?id=148666>.
Title Length Color Rating  
The effect of osmosis in potato cells with different concentrations of sucrose solution - 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....   [tags: GCSE Biology Osmosis Coursework] 1883 words
(5.4 pages)
Powerful Essays [preview]
Investigate the Osmosis in Potato Rods in Various Concentrations of Salt Solutions - Investigate the Osmosis in Potato Rods in Various Concentrations of Salt Solutions Introduction: Osmosis is the movement of water molecules across a partially permeable membrane from a region of high water potential to a region of low water potential. It can be affected by several different variables including concentration of salt solutions. When a plant cell is put in pure water it will become turgid and it will not burst due to the presence of a cell wall and a large permanent vacuole and when it is put in a concentrated solution it will be plasmolysed, on the other hand when an animal cell is put in pure water it will burst due to the absence of the cell wall which is only present in t...   [tags: GCSE Biology Osmosis Coursework] 2303 words
(6.6 pages)
Powerful Essays [preview]
How Osmosis Affects A Potato Chip Essay - How Osmosis Affects A Potato Aim: - To See How Osmosis Affects A Potato Preliminary work Prediction: -I predict that the weight of the potato in the sugar solution will decrease and the weight of water will increase. I predict that the weight of the potato in the sugar solution will decrease when it reaches 3:1 (salt: water). In put Variables: -Molarity -Size of potato -Mass of Water -Molarity of Sugar -Length of time in the solution -Temperature of water Out put variables: -Weight of potato Key variables: -Molarity of sugar....   [tags: GCSE Biology Osmosis Coursework] 1364 words
(3.9 pages)
Strong Essays [preview]
Investigating Osmosis in Potato Cells Essay - Investigating Osmosis in Potato Cells Planning: Aim:- To investigate the effect of different concentrations of sucrose solution, on potato cells Osmosis:- Osmosis is the passage of high water concentration through a semi-permeable membrane to a region of low water concentration, i.e. the passage of water. Explanation of osmosis For osmosis to occur there must be; semi-permeable membranes are very thin layers of material (cell membranes are semi-permeable) which allow some things to pass through them but prevent other things from passing through....   [tags: Papers] 1548 words
(4.4 pages)
Strong Essays [preview]
Investigating Osmosis in Potato Chips Essay - Investigating Osmosis in Potato Chips Planning Introduction: the definition of osmosis is the movement of water particles from a weaker solution to a stronger solution through a partially permeable membrane. Aim of investigation: I am trying to find out how external concentration of liquid surrounding a potato chip affects it - does it increase or decrease in mass etc. Method, diagram and equipment: Diagram of experiment Equipment · 5 Boiling tubes · weighing scales · sucrose solution · cork borer · a knife · white slate · potato Method: for my experiment I will: 1....   [tags: Papers] 1543 words
(4.4 pages)
Strong Essays [preview]
Essay on Investigate the Osmosis of Potato Cells in Various Salt Solutions - Investigate the Osmosis of Potato Cells in Various Salt Solutions Introduction I have been asked to investigate the effect of changing the concentration of a solution on the movement of water into and out of potato cells. I will be able to change the input of my experiment. The input variable will be the concentration of the solution. The 100% solution is sodium chloride dissolved in water (salt water). This will be referred to as the 100% solution from now on. But the type of solution is not important as Osmosis is all about differences in concentrations....   [tags: GCSE Biology Osmosis Coursework] 2516 words
(7.2 pages)
Powerful Essays [preview]
An Investigation to Observe the Effect of Different Sugared Solutions on the Mass of Potato Tubes - An Investigation to Observe the Effect of Different Sugared Solutions on the Mass of Potato Tubes Introduction: Diffusion is the natural random movement of gas and liquid particles, from a high concentration of that substance to a low concentration. An example of diffusion in body is in the lungs. Oxygen in the alveolar air spaces diffuses in to the blood capillaries. Osmosis it the diffusion of water particles through a partially permeable membrane, from an area of high concentration to an area of low concentration....   [tags: Papers] 582 words
(1.7 pages)
Strong Essays [preview]
Showing the Progress of Osmosis in Potato Tissues Essay - Showing the Progress of Osmosis in Potato Tissues Aim The aim of this coursework is to investigate the rate of osmosis in different concentrations of sugar solution using potato tissues. Prediction I think that in sugar solutions of high concentration, the mass of the potato will go down. This is due to the rules of Osmosis. Osmosis is the movement of water molecules across a partially permeable membrane, from a region of high water concentration to a region of low water concentration....   [tags: Papers] 2743 words
(7.8 pages)
Strong Essays [preview]
Investigate the Effect of Varying Solution Concentration on Osmosis in a Potato Chip - Investigate the Effect of Varying Solution Concentration on Osmosis in a Potato Chip Prediction A definition of osmosis is: 'the movement of water molecules from an area of high water concentration to a low water concentration across a semi-permeable membrane' (Oxforddictionary 2000). In a high concentration of water the amount of solute (e.g. sugar) is low. These solutions are usually known as a dilute or weak solution. But in a low concentration of water the amount of solute (e.g. sugar) is high....   [tags: GCSE Biology Osmosis Coursework] 3441 words
(9.8 pages)
Powerful Essays [preview]
osmosis Essay - Aim: The aim of this experiment is to investigate the movement of water into and out of plant cells by osmosis. The cells chosen for study will be taken from potato tubes as they provide a ready supply of homogeneous material. I did the investigation in two parts, the first part of my investigation was my preliminary investigation and then I did my official investigation. In both of my investigations there are several similarities, such as fair testing, variables, key variables, reliability of evidence and safety precautions....   [tags: essays research papers] 2741 words
(7.8 pages)
Strong Essays [preview]

Related Searches





The concentration of sugar solutions varied in each test tube.

We then put the stopwatch on and left them for half an hour. After we
weighed each potato tube and recorded our results. We did the
experiment twice. We did this to make sure our results were correct.

Preliminary method:

We did everything the same as in our other experiment except we left
the potato tubes in the sugar solution for twenty minutes. We changed
the time we left the potato tubes in the test tubes to half an hour
because we didn’t see much change in twenty minutes.

Health and Safety:



The scalpel, which we used to cut the potato tubes, was very sharp.
The test tubes are made of glass so we had to be careful. Also we were
using a dirty potato and we had to cover up all our cuts so we didn’t
catch an infection.
======================================================================

Results Table:

Experiment 1:

Sugar Solution

Concentration

Mass of potato before (g)

Mass of potato after (g)

Change in mass (g)

Change in mass %

0%

1.253

1.223

+0.03

+2.3

10%

1.250

1.240

+0.01

+0.8

20%

1.283

1.253

-0.03

-2.3

30%

1.178

1.108

-0.07

-5.9

40%

1.173

1.083

-0.09

-7.6

50%

1.214

1.074

-0.014

-11.5

I did the experiment again to make sure my results were accurate.

Experiment 2:

Sugar Solution

Concentration

Mass of potato before (g)

Mass of potato after (g)

Change in mass (g)

Change in mass %

0%

1.533

1.483

+0.05

+3.3

10%

1.610

1.600

-0.01

-0.62

20%

1.558

1.528

-0.03

-1.93

30%

1.660

1.600

-0.06

-3.61

40%

1.605

1.545

-0.06

-3.73

50%

1.573

1.463

-0.11

-6.99

Graph: -

Conclusion:

I repeated the experiment to give me a more accurate set of results.
Also to see if my prediction was correct and it was because I said
that pure water or low concentration sugar solution the potato tubes
will swell and more water will enter their cells by osmosis. Also that
the potato tubes in higher concentration sugar solution will shrink
because water leaves their cells due to osmosis.

In my first results table I hade one anomalous set of results I have
highlighted it in red and have also circled in red on my graph. 32%
was a bit high and I would have expected it to be around 28% or 27%.
I’m not quite sure why this result was so high it may have been
because I weighed it incorrectly. In my second set of results I also
have an anomalous once again this is highlights and circled in my
graph. –2% is rather low and would of expected it to be around –5%.
This once again could be due to incorrect weighing.

In my second results table my results did what I wrote in my
prediction except from one of my results.

Evaluation:

In my experiment I think I had enough results. I also thought my first
experiment wasn’t accurate but my second experiment was. My results
are quite reliable but they could have been more reliable if I did the
experiment again. Repeating the experiment increases the reliability.

The reason I had anomalous results is because I obviously didn’t weigh
them correctly and if I did the experiment again I would weigh them
twice.

From my experiment I can conclude by saying potato tubes in low sugar
solution had a higher mass because there is more water entered by
osmosis. The potato tubes in high sugar solution will have a lower
mass because the water leaves by osmosis.

If I did the experiment again I would do it twice but at the same
time. So I can defiantly make sure that they are exactly the same.
Also I would make sure the potatoes are the same size and the same
make of potato.


Return to 123HelpMe.com