How does temperature affect reaction rate for the reaction between sodium bicarbonate and ethanoic acid measured from the rate of change of pressure inside a flask, and what is the activation energy for the reaction?HL
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6
Official IB Result
IB Grade: 6
Criteria A: Research Design
5/6
0
3
6
Criteria StrandsPro
A.1Research question context
Excellent
A.2Methodological considerations
Good
A.3Methodology description
Good
Criteria Feedback
- The student's research question is focused, chemically specific, and clearly linked to the variables they intended to investigate.
- The student shows strong planning by setting out multiple temperature conditions, repeats, controls, and a clear measurement approach.
- The student included enough practical detail and supporting visuals for a reader to understand the overall setup.
- Some scientific framing is imprecise, especially where the reaction type and pressure explanation are oversimplified.
- A few important methodological issues are not fully anticipated, such as sealing delay, leakage, and gas loss.
- The procedure is not completely reproducible because some key operational details are still missing.
Criteria B: Data Analysis
4/6
0
3
6
Criteria StrandsPro
B.1Communication of data recording and processing
Good
B.2Consideration of uncertainties
Moderate
B.3Data processing quality
Poor
Criteria Feedback
- The student presents their raw and processed data in an organised way with units, averages, and uncertainty values.
- The student makes sensible use of repeats, error bars, and a graph that helps show the relationship they are testing.
- The student's tables and figures generally allow the reader to follow the main flow of the processing.
- The central rate processing is incomplete because the gas-headspace volume and reaction-solution volume are not included in the conversion from pressure change to reaction rate.
- The uncertainty treatment does not fully address the biggest sources of error, especially the extraction of the initial tangent and the effect of sealing or leakage.
- Some later calculations depend on assumptions that are not established by the experiment itself, which weakens the validity of the derived values.
Criteria C: Conclusion
4/6
0
3
6
Criteria StrandsPro
C.1Conclusion relevance and support
Moderate
C.2Scientific context comparison
Poor
Criteria Feedback
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- Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
- Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
Criteria D: Evaluation
6/6
0
3
6
Criteria StrandsPro
D.1Methodological weaknesses
Good
D.2Suggested improvements
Good
Criteria Feedback
- Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
- Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
- Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
- Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.