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Chemistry IA Exemplar: Voltage and Copper Deposition Rate | RevisionDojo
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IB Chemistry SL Internal Assessment Example
How does varying the voltage applied during electroplating with 1 mol dm^-3 of aqueous copper(II) sulfate and a current of 2A for 180 seconds impact the rate of reaction as measured by the mass of copper deposited onto a 20g brass electrode?SL
Overall Score: 18/24
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Criteria A: Research Design
5/6
0
3
6
Criteria Strands
A.1Research question context
Excellent
A.2Methodological considerations
Good
A.3Methodology description
Good
Criteria Feedback
Your research question is tightly focused on a specific electrochemical system and clearly identifies the variables and measured outcome.
You provide strong chemical context, including relevant half-equations and competing reactions, which makes the investigation feel purposeful and scientifically grounded.
Your control choices and replication show thoughtful planning and awareness of what could influence the results.
The investigation does not fully explain how the current was actually maintained or verified at the stated value across different voltages.
Some methodological choices are justified, but the logic is not always developed deeply enough to show why each control fully protects the validity of the design.
A few procedural details are still missing for complete reproduction, especially around consistency of setup and electrode handling.
Criteria B: Data Analysis
5/6
0
3
6
Criteria Strands
B.1Communication of data recording and processing
Excellent
B.2Consideration of uncertainties
Good
B.3Data processing quality
Good
Criteria Feedback
Your raw and processed data are presented clearly, with good use of tables, units, and stated uncertainties.
You show your processing transparently, including sample calculations, normalization, means, standard deviations, and fitted trendlines.
Your graphs are well labeled and easy to interpret, with error bars and regression information that support the analysis.
Your treatment of uncertainty is thoughtful but not fully complete, especially when it comes to propagating uncertainty into the fitted relationship.
Some statistical choices, such as how mean uncertainty is handled, are not fully robust and would benefit from a more rigorous approach.
A few processing decisions, including how one anomalous result is handled, would be stronger with a more quantitative justification.
Criteria C: Conclusion
4/6
0
3
6
Criteria Strands
C.1Conclusion relevance and support
Excellent
C.2Scientific context comparison
Good
Criteria Feedback
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Criteria D: Evaluation
4/6
0
3
6
Criteria Strands
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.
Unlock all criteria
Upgrade to PRO to see detailed feedback for all criteria in this exemplar.
