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Investigating the change in length and mass of cylinders of Potatoes.

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Introduction

Investigating the change in length and mass of cylinders of Potatoes Results Table My results Conc. of Sucrose Tube 1 Tube 2 Tube 3 Average Length % of gain/loss H20 5.4 5.4 5.3 5.3 6 0.2 5.1 5.2 5 5.1 2 0.4 5.1 5 5.1 5.06 1.2 0.6 5 5.2 4.9 5.03 0.6 0.8 5 4.9 4.9 4.93 -1.4 1 4.9 4.9 4.8 4.9 -2 Another groups results Conc. of sucrose Tube 1 Tube 2 Tube 3 Average Length % of gain/loss H20 5.6 5.5 5.5 5.5 2 0.2 5.4 5.4 5.45 545 1 0.4 5.4 5.4 5.35 5.4 0 0.6 5.35 5.3 5.3 5.3 -2 0.8 5.25 5.2 5.25 5.25 -3 1 5.15 5.15 5.15 5.15 -5 The Change in Mass Before experiment Molar Concentration of sucrose solutions Total Mass(g) ...read more.

Middle

The graph gives me an excellent set of results. In my experiment the potato in the water had a 6% gain in length. The potato in the 0.2 molar sucrose solution had an increase in length of 2%, the potato in the o.4 molar solution had a increase in length of 1.2 %. The potato in the 0.6 molar solution had an increase of 0.6%, the potato in the 0.8 molar solution decreased by 1.4% and the solution in the 1 molar solution decreased by 2%. These prove that the higher the concentration of water in a cell the more it grows.The results also show that in the distilled water the potato gains in mass by approximently 7.4% then it gains 4.4% in the 0.25M solution. ...read more.

Conclusion

Also the potato itself was not definitely from the same potato and was not exactly the same size, although I did try to cut them to 5cm each. Another way of improving the results would have been to leave the experiment running longer, this would have enabled me to find the saturation point (when the potato can no longer take in any more water) and dehydration point (when the potato cannot lose any more water)and therefore get a more accurate result. Finally, I could extend the experiment to a more exact level by looking at the potato cylinders under a microscope, then I would be able to see the cells in greater detail and draw some more observational results. ...read more.

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