• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month
Page
1. 1
1
2. 2
2
3. 3
3
4. 4
4
5. 5
5
6. 6
6
7. 7
7
8. 8
8
9. 9
9

# Explore how the concentration of a sucrose solution affects the rate of osmosis.

Extracts from this document...

Introduction

Investigate the factors affecting osmosis in plant tissue Aim: To explore how the concentration of a sucrose solution affects the rate of osmosis Introduction: Diffusion is the movement of particles from a high concentration to a low concentration until they are spread out evenly. An example of diffusion is when an aerosol is sprayed. The particles spread out from the high concentration at the nozzle into the rest of the room and that is how the smell moves. Osmosis is the passage of water molecules from a weaker solution to a stronger solution through a partially permeable membrane. Osmosis is a type of diffusion involving water - the water molecules move from a weak solution (with a high concentration of water) into a strong solution (with a low concentration of water). This can be shown in a diagram The cell membrane in a plant cell is partially permeable - it has small holes that can let in small molecules but not large ones. This allows water through and therefore allows osmosis. When the cell has all the water it can take inside of it the osmosis process stops. The water pushes up against the cell wall which is strong enough to stop it bursting. The cell is turgid and the plant needs turgid cells to give it rigidity and allow it to stand upright. ...read more.

Middle

Weigh each potato chip and record it's new mass. Subtract the original mass from the new mass to determine the change in mass. A positive number denotes an increase in mass while a negative number denotes a loss of mass. For each potato chip be sure to keep a record of the concentration of solution it was in. Clean out all of the boiling tubes and the measuring cylinder and repeat this experiment twice more in order to have three sets of results and a more accurate set of averages. Results: These are my raw results. Concentration (molars) 0.0 0.1 0.2 0.3 0.4 Original Mass (g) 4.39 5.05 4.78 6.16 4.71 New Mass (g) 5.37 5.43 4.88 5.77 4.26 Change in Mass (g) 0.98 0.38 -0.1 -0.39 -0.45 Concentration (molars) 0.0 0.1 0.2 0.3 0.4 Original Mass (g) 5.46 4.69 4.96 5.12 5.75 New Mass (g) 6.14 4.95 4.98 4.70 5.10 Change in Mass (g) 0.68 0.26 0.02 -0.42 -0.65 Concentration (molars) 0.0 0.1 0.2 0.3 0.4 Original Mass (g) 4.92 5.67 4.81 4.71 4.65 New Mass (g) 5.53 5.88 4.76 4.26 3.88 Change in Mass (g) 0.61 0.21 -0.05 -0.45 -0.77 In order to account for the differences in mass of the original potato chips I have decided to display my results for the final mass as a percentage change from the original mass. ...read more.

Conclusion

I would also like to do an experiment using the same concentrations as I did in this one, but repeating it about 5 times, each time leaving the potato chip in the solution for different time periods. I could then compare the gradients of the lines of best fit for the 5 different times, and also draw graphs for each molarity across the 5 time periods. I could also do an experiment using the same concentrations as I did in this experiment, but measuring the mass of the potato chips after every 3 or 4 hours until the mass stays the same, and see how long potato chips in different solutions took to reach a final mass and to see how large it's mass would get. Finally I would like to do the same experiment as I did here, but try it out on different types of plants and compare the rates of osmosis of the different plants. This would give an idea of which plants were more efficient at taking up water and I could see what types of plants had the fastest rate of osmosis, and whether there was a link between the rate of osmosis in a plant and the habitat it exists in. For example I might find that plants that live in hot, dry conditions have a faster rate of osmosis than plants which live in cold, wet environments. These experiments would help give a better idea of how the rate of osmosis is affected by the concentration of a solution. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Life Processes & Cells section.

## Found what you're looking for?

• Start learning 29% faster today
• 150,000+ documents available
• Just £6.99 a month

Not the one? Search for your essay title...
• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month

# Related GCSE Life Processes & Cells essays

1. ## Investigating the effect of Sucrose Concentration on the Rate of Osmosis in Potato Chips.

5 star(s)

* Record the averages in a table like so: Concentration (mol/litre) Average mass before (g) Average mass after (g) Average percentage change in mass (%) 0.0 0.2 0.4 0.6 0.8 1.0 * Dispose of all solutions and potato chips and clear away work surface when finished.

2. ## How does the concentration of a sucrose solution affect the rate of Osmosis in ...

5 star(s)

particles and causes an increase or decrease in the mass of the potato. After the potato has been in the water for 60 minutes I will weigh it again (on the same scales) and record the results. I will expect there to have been a slight change in its mass,

1. ## The aim of this investigation is to find out how the concentration of the ...

4 star(s)

The 1M and 2M solution do not have such extreme differences in concentration to the potato tubes, and therefore not so much osmosis will occur because the tubes will not be particularly turgid or flaccid. It is harder to predict as I am not sure of the exact concentration of

2. ## To investigate how varying the concentration of sucrose solutions affects the rate of osmosis ...

3 star(s)

Ruler 11. Graph paper 12. Weighing scales Method: I used the cork borer to obtain 30 potato cylinders. Then using the scalpel, I cut off both ends of each potato cylinder. I measured the lengths of each potato cylinder and cut it accordingly so that all of them were 5.00cm in length.

1. ## How Does The Concentration of a Sucrose Solution Affect The Mass of a Potato ...

Results Potato Chips After Twenty Minutes Concentration of sucrose solution (molar) Initial mass (g) Mass after twenty minutes (g) Change in mass (g) Percentage change in mass Average percentage change in mass A B A B A B A B 0.1 1.40 1.42 1.65 1.45 0.25 0.03 18.1 2 10.1

2. ## Osmosis is defined as 'the movement of water molecules from an area of high ...

This will allow us to see whether osmosis has taken place, and to what extent. The volume of the solution that the potato chips are kept in must be fair. The must be totally covered in the solution, and the amount of solution will be kept the same because all the potato chips are the same size.

1. ## Looking at how concentration affects the movement of water particles through a partially permeable ...

These cells are now plasmolysed. Osmosis in animal cells The cell membrane is partially permeable in animal cells. The red blood cells in this, pictures have been placed in distilled water. Their cytoplasm is a strong solution. Water passes into the cells by osmosis.

2. ## Investigation to see how Concentration affects the rate of Osmosis on Potatoes.

This is because of the Concentration Gradient. The concentration gradient is the difference in the concentration on either side of the membrane. If the gradient is very large, then osmosis will occur at a faster rate, while if it is low, then osmosis will occur at a slow rate.

• Over 160,000 pieces
of student written work
• Annotated by
experienced teachers
• Ideas and feedback to