1. The following experiment was used to study the movement of water in and out of cells.

• A glass thistle funnel was half filled with sucrose solution.

• The bottom of the thistle funnel was closed by a selectively permeable membrane.

• The thistle funnel was placed in a beaker containing distilled water. As shown in Image 5.1.

• The level of sucrose solution in the glass tube was marked.

• The apparatus was left for 30 minutes and then the level of the sucrose solution in the glass tube was measured.

• The distance the sucrose solution had moved was calculated.

• If the level of the sucrose solution went up, the number was recorded as a positive number, but if the level of the sucrose solution went down, the number was recorded as a negative number.

• The experiment was repeated by placing the thistle funnel in salt solutions of 0.2, 0.3, 0.6 and 0.8mol/dm³ .

Image 5.1

The results of the experiment are shown in Table 5.2.

Table 5.2

Use the results from Table 5.2 to produce a line graph on Graph 5.3 below. The scale and label for the y axis have been completed for you, along with the origin for the x axis

Graph 5.3