All the method is referred to the sheet given. In order to dilute1.0 mol dm-3 of sucrose solution given to bring forth 0.2 mol dm-3 of sucrose solution, 0.3 mol dm-3 of sucrose solution, 0.4 mol dm-3 of sucrose solution and 0.5 mol dm-3 of sucrose solution, the expression below is used ;
M1V1 = M2V2
Don't use plagiarized sources. Get Your Custom Essay on
Concentration Of The Sucrose Solution Biology
Just from $13,9/Page
For illustration:
To bring forth 0.2 mol dm-3 of sucrose solution with volume of 20cm3
M1 ( initial concentration of sucrose solution ) = 1.0 mol dm-3
V1 ( initial volume of sucrose solution ) = ?
M2 ( concluding concentration of sucrose solution ) = 0.
2 mol dm-3
V2 ( initial volume of sucrose solution ) = 20 cm3
M1V1 = M2V2
mol dm-3 ) V1 = ( 0.2 mol dm-3 ) ( 20 cm3 )
V1 = ( 0.2 mol dm-3 ) ( 20 cm3 )
( 1.0 mol dm-3 )
V1 = 4 cm3
RESEARCH QUESTIONS
Does verifying the concentration of sucrose solution would impact the length of murphy strips and apple strips after 125 proceedingss?
Does the volume of the sucrose solution affected?
Hypothesis
If the concentration of the sucrose solution is high, which is a hypertonic concentration, the length of murphy strips and apple strips will diminish because the H2O molecules moved out from the murphy and apple tissue to the sucrose solution.
This causes a lessening in the length of murphy and apple strips. Therefore, the murphy and the apple strips become flaccid. The volume of the sucrose solution will increase coincident due to the decreased of murphy and apple lengths.
If the concentration of the sucrose solution is low, which is a hypotonic concentration, the length of murphy and apple strips size will increase and go bombastic because the H2O moved out of the murphy and the apple cells. The volume of the sucrose solution will diminish at the same time with the decreased of murphy and apple lengths.
If the concentration of the sucrose solution is same as the concentration of murphy and apple tissues, there will be no alteration on the length of murphy and apple strips because the motion of H2O molecules into and out of the murphy and apple cells is the same. The volume of the sucrose solution besides will non alter. This called isotonic.
Variables:
Independent variable:
Independent variable
Concentration of saccharose
Dependent variable
Final length of murphy and apple strips after 125 proceedingss
Changeless variable
Initial length of apple and murphy strips
Initial volume of sucrose solution
Five strips of apple and murphy are put in each trial tubing
Raw Data
Concentration of sucrose solution ( mol dm-3 )
Volume of 1.0 mol dm-3 of sucrose solution ( cm3 )
Volume of distilled H2O ( cm3 )
0.2
4
16
0.3
6
14
0.4
8
12
0.5
10
10
1.0
20
0QUALITATIVE Datas
Table 1: The volume of sucrose solution and volume of distilled H2O needed
to thin the 1.0 mol dm-3 of sucrose solution.
Observation on the alterations occurs to the apple strips and murphy strips.
molar concentrations of sucrose solution ( mol dm-3 )
0.2
0.3
0.4
0.5
1.0
Change in length
thirster
thirster
Lapp
shorter
shorter
Change in degree of
sucrose solution
lessening
lessening
same
addition
addition
Texture and visual aspect
turgid
less bombastic
house
soft
soft
Table 2: Changes occur to apple strips after the experiment
molar concentrations of sucrose solution ( mol dm-3 )
0.2
0.3
0.4
0.5
1.0
Change in length
thirster
thirster
same
same
shorter
Change in degree of
sucrose solution
lessening
lessening
lessening
lessening
addition
Texture and visual aspect
crunchy
crunchy
crunchy
crunchy
soft
Table 3: Changes occur to potato strips after the experiment
QUANTITATIVE DATA
length of apple strips, centimeter ( ±0.05cm )
molar concentration of sucrose solution
strip 1
strip 2
strip 3
strip 4
strip 5
( mol dm-3 )
initial
concluding
initial
concluding
initial
concluding
initial
concluding
initial
concluding
0.2
4.0
4.1
4.0
4.2
4.0
4.1
4.0
4.0
4.0
4.2
0.3
4.0
4.3
4.0
4.1
4.0
4.1
4.0
4.2
4.0
4.1
0.4
4.0
3.9
4.0
4.0
4.0
4.1
4.0
4.0
4.0
3.9
0.5
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
1.0
4.0
3.7
4.0
3.7
4.0
3.8
4.0
3.8
4.0
3.8
Table 4a: The length of 5 apple strips before and after 120 proceedingss.
molar concentration of sucrose solution
( mol dm-3 )
Initial volume of sucrose solution,
( ± 0.05cm3 )
Concluding volume of sucrose solution,
( ± 0.05cm3 )
0.2
20.00
18.00
0.3
20.00
17.00
0.4
20.00
16.50
0.5
20.00
18.00
1.0
20.00
20.50
Table 4b: The initial and concluding volume of sucrose solution for apple strips
length of murphy strips, ( ±0.05cm )
molar concentration of sucrose solution
strip 1
strip 2
strip 3
strip 4
strip 5
( mol dm-3 )
initial
concluding
initial
concluding
initial
concluding
initial
concluding
initial
concluding
0.2
4.0
4.4
4.0
4.5
4.0
4.2
4.0
4.1
4.0
4.1
0.3
4.0
4.0
4.0
4.1
4.0
4.1
4.0
4.1
4.0
4.1
0.4
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
0.5
4.0
3.8
4.0
3.8
4.0
3.9
4.0
3.7
4.0
3.7
1.0
4.0
3.5
4.0
3.5
4.0
3.6
4.0
3.7
4.0
3.4Table 5a: The length of 5 murphies strips before and after 120 proceedingss
molar concentration of sucrose solution
( mol dm-3 )
Initial volume of sucrose solution,
( ± 0.05cm3 )
Concluding volume of sucrose solution,
( ± 0.05cm3 )
0.2
20.00
19.00
0.3
20.00
20.00
0.4
20.00
20.00
0.5
20.00
21.00
1.0
20.00
21.00
Table 5b: The initial and concluding volume of sucrose solution for murphy strips
DATA Processing
Average = length of ( strip 1 + strip 2 + strip 3 + strip 4 + strip 5 )
5
length of apple strips, ( ±0.05cm )
molar concentration of sucrose solution
strip 1
strip 2
strip 3
strip 4
strip 5
Average
( mol dm-3 )
initial
concluding
initial
concluding
initial
concluding
initial
concluding
initial
concluding
initial
concluding
0.2
4.0
4.1
4.0
4.2
4.0
4.1
4.0
4.0
4.0
4.2
4.0
4.1
0.3
4.0
4.3
4.0
4.1
4.0
4.1
4.0
4.2
4.0
4.1
4.0
4.2
0.4
4.0
3.9
4.0
4.0
4.0
4.1
4.0
4.0
4.0
3.9
4.0
4.0
0.5
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
1
4.0
3.7
4.0
3.7
4.0
3.8
4.0
3.8
4.0
3.8
4.0
3.8
Table 6a: Average length of apple strips
Difference of apple strips length = Final reading – initial reading
molar concentration of sucrose solution
( mol dm-3 )
Initial reading, ( ±0.05cm )
Final reading, ( ±0.05cm )
Difference in reading ( ±0.1cm )
0.2
4.0
4.1
0.1
0.3
4.0
4.2
0.2
0.4
4.0
4.0
0.0
0.5
4.0
4.0
0.0
1.0
4.0
3.8
-0.2
Table 6b: Difference in reading of the apple strips
Average = length of ( strip 1 + strip 2 + strip 3 + strip 4 + strip 5 )
5
length of murphy strips, ( ±0.05cm )
molar concentration of sucrose solution
strip 1
strip 2
strip 3
strip 4
strip 5
Average
( mol dm-3 )
initial
concluding
initial
concluding
initial
concluding
initial
concluding
initial
concluding
initial
concluding
0.2
4.0
4.4
4.0
4.5
4.0
4.2
4.0
4.1
4.0
4.1
4.0
4.3
0.3
4.0
4.0
4.0
4.1
4.0
4.1
4.0
4.1
4.0
4.1
4.0
4.2
0.4
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
0.5
4.0
3.8
4.0
3.8
4.0
3.9
4.0
3.7
4.0
3.7
4.0
3.8
1
4.0
3.5
4.0
3.5
4.0
3.6
4.0
3.7
4.0
3.4
4.0
3.5
Table 7: Average length of murphy strips
Difference of murphy strips length = Final reading – initial reading
molar concentration of sucrose solution
( mol dm-3 )
Initial reading, ( ±0.05cm )
Final reading, ( ±0.05cm )
Difference in reading ( ±0.1cm )
0.2
4.0
4.3
0.3
0.3
4.0
4.2
0.2
0.4
4.0
4.0
0.0
0.5
4.0
3.8
-0.2
1.0
4.0
3.5
-0.5
Table 7b: Difference in reading of the murphy strips
Decision
If the concentration of the sucrose solution is high, which is a hypertonic concentration, the length of murphy strips and apple strips will diminish because the H2O molecules moved out from the murphy and apple tissue to the sucrose solution. This causes a lessening in the length of murphy and apple strips. Therefore, the murphy and the apple strips become flaccid. The volume of the sucrose solution will increase at the same time with the decreased of murphy and apple lengths. The hypertonic solution for apple strips is at 0.2M and 0.3M, whereas for the murphy strips is at 0.2M and O.3M besides.
If the concentration of the sucrose solution is low, which is a hypotonic concentration, the length of murphy and apple strips size will increase and go bombastic because the H2O moved out of the murphy and the apple cells. The volume of the sucrose solution will diminish at the same time with the decreased of murphy and apple lengths. The hypotonic solution for apple strips is at 0.5M and 1.0M, whereas for the murphy strips is at 1.0M.
If the concentration of the sucrose solution is same as the concentration of murphy and apple tissues, there will be no alteration on the length of murphy and apple strips because the motion of H2O molecules into and out of the murphy and apple cells is the same. The volume of the sucrose solution besides will non alter. This called isotonic. The isosmotic solution for the apple strips is at 0.4M, whereas for the murphy strips is 0.4M and 1.0M.
The hypothesis is accepted.
Restriction
Suggestion
Mistake may happen during the measuring to find the length of murphy strips.
the measuring should be repeated for at least 3 times to minimise the mistake in the experiment.
Mistake may happen while taging the degree of sucrose solution due to the hapless method of mensurating that is by ocular observation.
A more precise tool should be used to acquire the most precise informations.
. The surface of potato strips may non flat. So even though we controlled the initial length, really the initial length are non same for each murphy strips
the mass of murphy strips in order to detect the alterations of elongation of the murphy strips in each solution to acquire more accurate reading as the electronic mass balance has a little uncertainness compared than utilizing a swayer to mensurate the elongation.LIMITATIONS AND SUGGESTIONS
Downloads:
10
Views:
299
