The Effect of Different Concentrations of Sucrose On Visking Tubing

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Preliminary Work:

I am going to investigate the effect of different concentrations of sucrose on visking tubing

Apparatus:

* Measuring balance (used to measure the weight of the visking tubing)

* 18 beakers (containing varying concentrations of sucrose)

* 18 Visking tubing (containing sucrose solution of unknown concentration)

Diagram:

Method:

* I will gather the equipment in my apparatus list

* I will measure the weights of the visking tubing before they are put in the beaker. I will record the results

* I will put the visking tubing's in the beakers and leave them to react overnight

* I will take out the visking tubing and dry them, so no liquid will be left on it to effect the weight. I will then measure its weight on the measuring balance and record these results.

* I will then work out the mass and percentage change

Results:

Solution

(ml)

Number

Original mass (g)

Final mass (g)

Mass change (g)

Percentage change (%)

0.0

2

3

Average

0.2

2

3

Average

0.4

2

3

Average

0.6

2

3

Average

0.8

2

3

Average

.0

2

3

average

Aim:

To investigate the effect of osmosis in plant cells

Apparatus:

Electric Balance,

Borer,

Scalpel,

Potato,

Test tubes and racks,

Ruler,

Paper Towel

Safety Goggles,

Rubber gloves,

Sucrose

Diagram:

Method:

I will measure out 18 identical potato lengths, after I used the borer to get them from the potato. I will then weigh all of the potatoes and record the masses. I will then put the each potato in the sucrose solution in a test tube. Each solution will have 3 potatoes, so there will be 18 test tubes full of the sucrose solution and potatoes. When I return, I will remove all the pieces of potato, and dry them with paper towels. I will then measure them again and record. I will then work out the mass change and percentage change. I will record my results in a table like this.
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Solution (M)

Number

Original mass (g)

Final mass (g)

Mass change

Percentage change

Prediction:

In my experiment, I am going to determine whether increasing levels of sucrose effect the mass of potato cells. I will do this by completing the experiment with different concentrations of sucrose. As the water from the cell is released from the cell, it will osmose through the membrane into the solution. Another outcome is that the water in the solution osmoses into the cell. The final outcome is that there is no osmosis taken place in. ...

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