• 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

# Find the concentration of sucrose in a potato cell - Plan

Extracts from this document...

Introduction

Plan For Osmosis/Plasmolysis Experiment AIM In this experiment, I am trying to find the concentration of sucrose in a potato cell. Also I can observe when a cell is totally plasmolyised. PLAN I plan to complete this experiment within an hour. Firstly, I will cut 15 potato chips, 3 each for 5 different solutions, each weighing 1.2grams, cut with a 4mm corer to approx (full word) 4cm. I will measure weight, as length is less accurate. The weight of the chip may vary as much as 0.02 g each way, which will make it a lot easier to do, but may provide me with less accurate results. I will use 5 different molar solutions of 20 cm3 each, shown to the right. 0M (water), 0.5M, 1M, 1.5M and 2M. I will create 0.5 molar solutions by mixing 10cm3 of water and 10cm3 of 1 molar solution. ...read more.

Middle

I will use 5 different solutions, starting at 0 molar and going up in 0.5 molar concentrations. I have chosen this because they are equidistant, allowing for easy graph drawing, and also because from the preliminary experiment, I know that this will give me results that can show me the concentration of sucrose in the cells sap, and also go on to show me the concentration that the cell will plasmolyise at. I will also control the variety of potato- I will only use 1 brand, as different brands and types may have different concentrations of sucrose in their cells. . Also all solutions will be measured in beakers to 20 cm3, as if there was a higher volume in one solution, it would take longer to fully even out. My results will be quite reliable if I control the points above, and any anomalies will be identified. ...read more.

Conclusion

These results cannot tell me much, as they do not follow what you would expect. 15 MINS. 1.6g CHIP O MOLAR 1 MOLAR 2 MOLAR CHIP A 1.6g 1.36g 1.31g CHIP B 1.59g 1.41g 1.33g CHIP C 1.59g 1.40g 1.32g AVERAGE 1.593 1.39 1.32 AVERAGE CHANGE -0.44% -13.13% -17.50% Prediction My prediction above is in a slight 's' curve, which is based on the test A of my preliminary. Test A seemed to be the most logical to choose as it followed the patterns that I would expect it to. As we can see from it, the water solution increases its weight, and it shows that the cells concentration is , as this is where it crosses the x-axis. And also it shows us that the cell is fully plasmoliesed at around . this is because the graph starts to level off and that means that the chip is not losing any more weight, because the cell is fully plasmolyised. BY MICHAEL PEARCE ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Exchange, Transport & Reproduction 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 AS and A Level Exchange, Transport & Reproduction essays

1. ## Osmosis. Aim: To find the molarity of potato tubers cell sap. BIOLOGICAL ...

4 star(s)

its contents, osmosis wouldn't be taking place and there would be no net movement of water as the number of free molecules are same on either side of the semi-permeable membrane. Factors affecting Rate of Osmosis The rate of osmosis is often varied due to different factors.

2. ## Investigation on Osmosis using a potato.

This meaning that we should start the clock as soon as the potato is put inside the test tube, and stop the clock as soon as 2 hours have passed. Stopping the clock then taking them out and measuring them all in less than a minute is very much impossible because we lack the number of balances.

1. ## effects of concentrations of sugar solutions on potato chip cells

This is again due to osmosis. The osmosis theory states that when a plant cell is placed in a high water concentration, the water passes through the cell wall and membrane, through the cytoplasm and into the vacuole. The plant cell now has higher water potential than before, therefore it swells and becomes turgid.

2. ## Aim: To find out the water potential of potato cells using different concentrations of ...

Pure Water is given a water potential of zero. Adding solute molecules to the water lowers the water potential, making it negative. This is because the presence of the solute molecules lowers the concentration of the water molecules thus reducing the number of the water molecules that can diffuse out

1. ## Finding out the affect of different concentrations of sucrose solution on the mass of ...

The vacuole of cell sap and the cytoplasm would no longer push against the cell wall and it loses its turgidness and become flaccid. This also decreases the mass of the potato chip as there are less water molecules in the potato cells.

2. ## In this Sc-1 experiment, we are going to put potato chips into different concentrations ...

Also, different types of potatoes may also differ from the amount of water that they can absorb, so I will make sure that the chips I am going to use belong to the same potato specie. The same can also be affected by the potatoes' age.

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