Cecilia Wong
Nature of the task and the research question:
Two centimetre piece of potato is bathes into different salt solutions (0%, 5%, 10%, 15%, 25%, 35%) over a period of time, to determine the effect of different salt solutions on osmosis. To investigate the effect of increasing the concentration of sodium chloride (0%, 5%, 10%, 15%, 25%, 35%) on the process of osmosis, by calculating the mass change of the potato core (g, ±0.01g) at room temperate of lab (25.0˚C)
Table 1: Raw data
Table of Random uncertainties
Equipment Limit of reading Random uncertainties
Electronic balance 0.01g ± 0.01g
Ruler 0.5cm ±0.5cm
Table 2: Quantitative raw data
The mass of the potato core (g, ±0.01g) at different sodium chloride concentrations (0%, 5%, …show more content…
It could be stretched and bent
Table 4: Processed Quantitative Data
The mass change of the potato core (g, ±0.01g) at different sodium chloride concentrations (0%, 5%, 10%, 15%, 25%, 35%) at 0.0, 1200.0, 2400.0 & 3600.0 seconds.
Concentration of sodium chloride (%) Trials Mass Change of potato core (g, ±0.02g) Time (sec,±0.3sec) 0.0-1200.0 1200.0-2400.0 2400.0-3600.0
0 1 0.10 0.07 0.01 2 0.10 -0.15 0.05 3 0.17 0.10 - 4 0.11 0.03 - 5 0.13 0.03 0.01
5 1 -0.43 -0.030 -0.06 2 -0.29 -0.20 -0.60 3 -0.22 -0.01 - 4 -0.26 -0.03 - 5 -0.23 -0.70 0.02
10 1 -0.24 0.02 -0.20 2 -0.07 0.02 -0.04 3 -0.20 -0.07 - 4 -0.26 -0.05 - 5 -0.28 -0.04 -0.01
15 1 -0.80 0.06 -0.03 2 -0.18 0.02 0.01 3 -0.16 -0.02 …show more content…
Equating to 0.60 seconds this is divide by the number of trials which is 5. Which equated to 0.12 seconds
Conclusion
Aim:
Findings: e.g graphable trend
Wether it supports the theory
General paragraph, accuracy, reliable and valid
Evaluation
Systematic errors
Description Analysis Improvement
The increments do not go up in it’s orderly fashion Description, effect, impact To change the increment into 5% difference so that the mass changes of the potato would be more systematic, 0%, 15%, 20%, 25%, 30%. How you would do this, mini method.
The concentration of the sodium chloride may not be accurate as it was made Measure it out yourself
Mini method
Rod mix
Random errors
Description Analysis Improvement
Several of the potato was not exposed to the sodium chloride solution for the specified time
Cores from different potato was used in the experiment -how significant the error was
-what it will effect(accuracy, reliability)
-Direction (data? ,less or more)
In a trial different potatoes sample was use therefore making experiment less reliable To collect potato cores from only one potato in each trial
e.g sample shop, type, size(mention size how long and how wide using
Nature of the task and the research question:
Two centimetre piece of potato is bathes into different salt solutions (0%, 5%, 10%, 15%, 25%, 35%) over a period of time, to determine the effect of different salt solutions on osmosis. To investigate the effect of increasing the concentration of sodium chloride (0%, 5%, 10%, 15%, 25%, 35%) on the process of osmosis, by calculating the mass change of the potato core (g, ±0.01g) at room temperate of lab (25.0˚C)
Table 1: Raw data
Table of Random uncertainties
Equipment Limit of reading Random uncertainties
Electronic balance 0.01g ± 0.01g
Ruler 0.5cm ±0.5cm
Table 2: Quantitative raw data
The mass of the potato core (g, ±0.01g) at different sodium chloride concentrations (0%, 5%, …show more content…
It could be stretched and bent
Table 4: Processed Quantitative Data
The mass change of the potato core (g, ±0.01g) at different sodium chloride concentrations (0%, 5%, 10%, 15%, 25%, 35%) at 0.0, 1200.0, 2400.0 & 3600.0 seconds.
Concentration of sodium chloride (%) Trials Mass Change of potato core (g, ±0.02g) Time (sec,±0.3sec) 0.0-1200.0 1200.0-2400.0 2400.0-3600.0
0 1 0.10 0.07 0.01 2 0.10 -0.15 0.05 3 0.17 0.10 - 4 0.11 0.03 - 5 0.13 0.03 0.01
5 1 -0.43 -0.030 -0.06 2 -0.29 -0.20 -0.60 3 -0.22 -0.01 - 4 -0.26 -0.03 - 5 -0.23 -0.70 0.02
10 1 -0.24 0.02 -0.20 2 -0.07 0.02 -0.04 3 -0.20 -0.07 - 4 -0.26 -0.05 - 5 -0.28 -0.04 -0.01
15 1 -0.80 0.06 -0.03 2 -0.18 0.02 0.01 3 -0.16 -0.02 …show more content…
Equating to 0.60 seconds this is divide by the number of trials which is 5. Which equated to 0.12 seconds
Conclusion
Aim:
Findings: e.g graphable trend
Wether it supports the theory
General paragraph, accuracy, reliable and valid
Evaluation
Systematic errors
Description Analysis Improvement
The increments do not go up in it’s orderly fashion Description, effect, impact To change the increment into 5% difference so that the mass changes of the potato would be more systematic, 0%, 15%, 20%, 25%, 30%. How you would do this, mini method.
The concentration of the sodium chloride may not be accurate as it was made Measure it out yourself
Mini method
Rod mix
Random errors
Description Analysis Improvement
Several of the potato was not exposed to the sodium chloride solution for the specified time
Cores from different potato was used in the experiment -how significant the error was
-what it will effect(accuracy, reliability)
-Direction (data? ,less or more)
In a trial different potatoes sample was use therefore making experiment less reliable To collect potato cores from only one potato in each trial
e.g sample shop, type, size(mention size how long and how wide using