We use cookies to give you the best experience possible. By continuing we’ll assume you’re on board with our cookie policy

Osmosis Experiment – Solanum Tuberosum (Potato) Essay Sample

essay
The whole doc is available only for registered users OPEN DOC
  • Pages:
  • Word count: 459
  • Category: osmosis

Get Full Essay

Get access to this section to get all the help you need with your essay and educational goals.

Get Access

Osmosis Experiment – Solanum Tuberosum (Potato) Essay Sample

Hypothesis:

The potato will lose weight and become shrank when they are put in salt solutions. The higher concentrated the solution, the more the potato shrinks.

Osmosis is the passage of water at a cellular level from an area of low solute concentration to an area of high solute concentration through a membrane along a concentration gradient in order to equalize the level of water in each region. When potato strips are placed in concentrated salt solutions, they lose water by osmosis and they become “flaccid”. They become swollen and hard. When the salt solution becomes more concentrated, more water would move out from the potato by osmosis.

Variables and Fair Testing:

Independent Variable

Dependent Variables

Control Variables

Mass of potato

Salt concentration

1. Time duration

1. Temperature

1. Amount of salt solution

1. Size of potato samples

1. The control variables are kept constant to ensure a fair test. I will also use a pure water solution as a control in this experiment.

Apparatus:

1. 5 beakers of 500ml

2. Potatoes

3. Electronic scale to 2 d.p.

4. Distilled water

5. Cutting board

6. Ruler

7. Stopwatch

8. Paper towel

Method:

1. Cut potato into strips by borer to 3.0cm long. Prepare 25 of them.

2. Prepare 5 different concentration of salt solutions with NaCl and 50ml of distilled water each in the beakers and label them as below:

Qualitative Data – Before Experiment

The potato strips are generally rigid in structure.

All the potato strips appear similar

Qualitative Data – After Experiment

All the potato strips have shrunken in size and have reduced lengths.

Strips immersed in 4.00M NaCl solution have become very soft and soggy.

Quantitative Data

The data I collected from the experiment is shown below where it shows the percentage change in mass of the potato strips after they are immersed in different concentration of salt solutions.

Graph 1- The above average and standard deviation are plotted in the graph below to show the relationship to the percentage change in the mass of potato strips.

Conclusion

In conclusion, the results indicate that the concentration of salt solution have a correlation with the percentage change in mass. Graph 1 supports this theory.

The higher the concentration of salt solution, the larger the percentage change in mass of potato strips. (The y-xis is in negative figures).

The results for my control experiment did not turn out as I predicted. Instead of swollen, the strips also shrank after 24 hours in distilled water.

We can write a custom essay

According to Your Specific Requirements

Order an essay

You May Also Find These Documents Helpful

Osmosis in Plant Cells

Qualitative data: * Tube-pipe with 0.4 M solution wasn't fully plugged with stopper. * Potato cylinders in 1.0 M, 0.8 M, 0.6 M, 0.4 M solutions were floating while in 0.2M and 0.0 M solutions it was fully on the bottom. On the other hand in 1.0M solution it was on the top, while in 0.8 M solution a bit lower, 0.6 M more lower...

Osmosis Experiment

1. Design 1.1 Defining the problem Research Question Have you ever accidentally cooked a solanum tuberosum (potato) in high sodium chloride (salt) concentrated water? What was the result? This experiment is to consider how salinity influences osmosis in potato cells. By changing the concentration of salt (0%, 0.2%, 0.4%, 0.6%, 0.8%) within the water, the weight of the potato cube will be lighter or heavier...

The Effect on Osmosis on The Egg...

Osmosis is the transport of water molecules from an area of their high concentration (hypertonic solution) to an area of their low concentration (hypotonic solution) through a semi-permeable membrane1 such as cell membrane. This tendency, when water molecules move from one region to another is called the water potential. Osmosis is also called the passive movement so it does not require energy as direction of...

Osmosis in Potato

Defining problem and selection variables Purpose: The purpose of the experiment is to show how varying the concentration of salt solution affects osmosis in a potato piece. Background: * Osmosis: Diffusion of water molecules across a membrane from high concentration to low concentration. (Biology, Sixth edition - Campbell, Reece) * Hypotonic: higher concentration of solute than in the cytoplasm - water flows out of the...

Osmosis Lab Case

Introduction Osmosis is the movement of water molecules from an area of high concentration (low solute concentration) to an area of low concentration (high solute concentration). This passive form of transport is one that involves a semi permeable membrane. We humans and other animals contain many cells, and these cells all have a permeable membrane in which diffusion/osmosis occurs. This movement of water is vital...

Get Access To The Full Essay
icon
300+
Materials Daily
icon
100,000+ Subjects
2000+ Topics
icon
Free Plagiarism
Checker
icon
All Materials
are Cataloged Well

Sorry, but copying text is forbidden on this website. If you need this or any other sample, we can send it to you via email.

By clicking "SEND", you agree to our terms of service and privacy policy. We'll occasionally send you account related and promo emails.
Sorry, but only registered users have full access

How about getting this access
immediately?

Become a member

Your Answer Is Very Helpful For Us
Thank You A Lot!

logo

Emma Taylor

online

Hi there!
Would you like to get such a paper?
How about getting a customized one?

Can't find What you were Looking for?

Get access to our huge, continuously updated knowledge base

The next update will be in:
14 : 59 : 59
Become a Member