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Factor affect rate of osmosis
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Osmosis Investigation
Planning:
Introduction:
We have been asked by the teacher to do an experiment on osmosis and
the aim of this experiment is that we want to know the affect of
osmosis on a potato at different concentration.
Prediction:
I predict that if the potato has got more sugar particles than the
sugar concentration then potato will absorb sugar particles from the
sugar concentration and this will decrease the mass of the potato.
If the concentration has got more sugar particles than potato then
potato will loose its particles inside it and its mass will decrease.
Preliminary results:
Amount of concentration
Time
Initial mass (G)
Final mass(g)
thickness
%change
% difference
0.0
10 hrs
3.484
3.937
3 cm
88.49 %
-11.51
0.25
10 hrs
4.784
4.685
3 cm
102.11 %
2.11
0.50
10 hrs
4.651
4.379
3 cm
106.21 %
6.21
0.75
10 hrs
4.750
4.139
3 cm
114.76 %
14.76
1.0
10 hrs
4.718
4.071
3 cm
115.89 %
15.89
[IMAGE]
When we done the preliminary results in our class using a science
investigation programme in computer I got the above results which is
completely different from the results that I got when I did the
actual experiment. So this means that we did something wrong while
doing the experiment.
Scientific knowledge:
Osmosis is the movement of water particles from a high concentration
to a lower concentration along concentration gradients through a
partially permeable membrane.
If the potato has got more sugar particles than the concentration then
the potato will absorb the particles from the concentration this is
because the quantity of the particles inside the potato is more than