Page 157 - SUBSEC October 2017_Neat

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Place two (2) strips in each of the five (5) petri dishes and treat as follows:

Petri Dish Treatment
A cover with sucrose solution 0.1 M
B cover with sucrose solution 0.2 M
C cover with sucrose solution 0.3 M
D cover with sucrose solution 0.4 M
E cover with sucrose solution 0.5 M

The cucumber strips should be completely submerged in the solutions.

Cover the petri dishes and leave for 30 minutes.
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CONTINUE WITH THE REST OF THE EXAMINATION IN THE MEANTIME

After the 30 minutes have elapsed, measure the straight lengths of the strips in Solution 1 and
find the average length. Repeat for the other solutions.

(a) Construct a table to show your results which will include the following: sucrose
concentrations, initial length of strips, final length of strips and average length of strips in
each concentration.

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[8 marks]

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