*Jawapan yang disediakan ini adalah yang dapat memberikan SKOR 3 sahaja.
(a) Time(min) The rise sucrose level(ml)
0 0.0
10 4.5
20 9.5
30 9.9
(bi) Observations - Sample Answers :
1-The first 10 minutes, the sucrose solution level is 4.5ml.
2-At the 20th minutes, the sucrose solution level is 9.5ml.
3-At the 30th minutes, the sucrose solution level is 9.9ml.
(bii) Inference - Sample Answers :
1-At the 10th minute, water molecules diffuse through the
Visking tubing due to osmosis process.
2-At the 20th minute, water molecules diffuse through the
Visking tubing due to osmosis process.
3-At the 30th minute, water molecules diffuse through the
Visking tubing due to osmosis process.
(c) *same answer as (a); in table form
(d) Variables :
Variables Particulars to be implemented
Manipulated : The reading are taken at the different intervals//
Time The reading are taken at 10 minutes intervals
Responding : Measuare and record the rise in the sucrose
The rise in solution level by using the scale on the glass
the sucrose tube.
solution level
Constant : Using the same concentration of sucrose
Sucrose solution //
concentration//
Volume of Using the same volume of distilled water
distilled water
(e) Hypothesis - Sample Answers :
1-The longer the time taken, the higher the level of sucrose
solution(in the scaled glass tube)
2-The shorter the time, the higher the level of sucrose solution
(in the scaled glass tube)
3-If the time taken is shorter, the level of sucrose solution in the
scaled glass tube is less.
(f) Interpreting Data - Sample Answers :
[The level of sucrose solution increases with time.]
This is [because water molecules from outside the Visking tubing
diffuse through the semi permeable Visking tubing] [by osmosis
process.]
(g) Predicting - Sample Answers : (either answer 1 or answer 2)
1-[The level of sucrose solution in scaled glass tube increases
more than 9.9ml] because [water molecules diffuse through
the semi-permeable Visking tubing] [by osmosis process.]
2-[There is no increase in the level of sucrose solution in the
scaled glass tube] because [the dynamic equilibrium has
achieved.] The level of sucrose solution in the scaled glass
tube is 9.9ml [because the net movement of water molecules
in and out of the membrane is the same.]
(h) Defining by Operation - Sample Answers :
1-Osmosis is a process where water molecules enter the Visking
tubing at the 10th minute and the level of sucrose solution in
the scaled glass tube is raised at 4.5ml.
2-Osmosis is a process where water molecules enter the Visking
tubing at the 20th minute and the level of sucrose solution in
the scaled glass tube is raised at 9.5ml.
3-Osmosis is a process where water molecules enter the Visking
tubing at the 30th minute and the level of sucrose solution in
the scaled glass tube is raised at 9.9ml.
(i) Classifying :
Material Picture
Distilled water C
15% sucrose solution A
20% sucrose solution B and D