Cell Sap Essay

571 words - 3 pages

Measuring the water concentration of cell sap using plant tissue.AimThe aim of this experiment was to determine the concentration of sucrose solution which has equivalent water concentration to the plant cell sap.MethodA white tile, large potato, range of sucrose solution, cork borer, measuring cylinder,paper towels, five test tubes, test tube rack, ruler, knife, tongs and a balance were collected. A cork borer was used to cut five pieces ...view middle of the document...

The potato pieces were dabbed dry using a paper towel, then weighed on a balance and the starting mass in grams was recorded in a table. The three pieces of each potato were then added to the test tubes of sucrose solution and was left and timed for an hour.After the hour was finished the three pieces of the potato were collected out of the boiling tubes usings tongs lightly to reduce amount of handling. Potato pieces were then dabbed dry to remove excess liquid from the outside and weighed again, the end mass was then recorded in the same table as before. Then the percentage change in mass was calculated so that a class average could be collected. The final results were displayed in a line graph.RESULTS.
Sucrose concentration. (m)

Weight at start. (g)

Weight after an hour (g)

Difference in weight (g)

% change in weight.

Class Average.

0.1

0.74

0.81

+ 0.07

+ 9.5%

+ 5.4

0.2

0.52

0.54

+ 0.02

+ 3.9%

+ 6.8

0.3

0.58

0.55

- 0.03

- 5.2%

- 3.0

0.4

0.56

0.47

- 0.09

- 16.1%

- 11.2

0.5

0.59

0.48

- 0.11

- 18.6%

- 21.9

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