IBP Bio review

Topics: Cell wall, Cell, Concentration Pages: 4 (1746 words) Published: October 29, 2014

Data Collection:
The aim of this experiment was to test the weight of six potatoes before and after being put into different sucrose solutions. The following data was observed and collected throughout the experiment. Observations:

-Qualitative:
The potatoes were:
Tubed shaped
Yellow in color
Initially hard in texture
-Quantitative:
Table 1: Weight of the potato in grams before and after placed in a different concentrations of sucrose solutions. Sucrose solution (M) Weight Before (g) ± 0.01
(A) Weight After (g) ± 0.01
(B)
0 4.56 4.31
0.2 4.22 4.28
0.4 4.13 4.08
0.6 4.57 4.45
0.8 4.60 4.39
1.0 4.70 4.52
Distilled water is represented by 0M.
Table 2: Amount of sucrose solution (ml) before and after the experiment. Sucrose concentration (M) Before experiment (ml) ± 0.01
(A) After experiment (ml)
± 0.01
(B)
0 150 142
0.2 150 142
0.4 150 143
0.6 150 150
0.8 150 149
1.0 150 145
Data Processing:
In the following table, I found the difference between the weights of the potatoes before and after being put in the sucrose solutions by subtracting the final weight from the initial weight. For example: Table 1: 4.31- 4.56= -0.15 (B-A=C). Table 3: Weight of the potato before and after placed in a type of sucrose solution. Sucrose concentration (M) Weight Before (g) ± 0.01

(A) Weight After (g) ± 0.01
(B) Difference in Weight (g)
± 0.01
(B-A) Percentage Change (%)
0 4.56 4.31 -0.15 0.2 4.22 4.28 0.6 0.4 4.13 4.08 -0.5 0.6 4.57 4.45 -0.12 0.8 4.60 4.39 -0.21 1.0 4.70 4.52 -0.18 In table 4 below, the water potential is calculated for each sucrose concentration. Water potential is calculated using the following formula:

Water Potential (Ψ) = Solute Potential (ΨS) + Pressure Potential (ΨP) In this case, pressure potential would be equivalent to zero since there is no pressure being exerted on the sucrose solutions. Solute potential (ΨS) = -ICRT

Where:
I= the number of particles the molecule will make in the...
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