To what extent do temperature, the availability of light, and the availability of oxygen relatively affect the rate of vitamin C degradation in 20 ml sample solutions prepared from vitamin C tablets during 2 weeks of storage?SL
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A
Official IB Result
IB Grade: A
Criteria A: Focus and Method
6/6
0
3
6
Criteria Strands
A.1Topic communication and explanation
Excellent
A.2Research question formulation and focus
Excellent
A.3Research methodology
Excellent
Criteria Feedback
- You kept the investigation tightly linked to the real-world problem of vitamin C storage and degradation.
- Your research question is specific, testable, and clearly framed around the key variables.
- The methodology is detailed, deliberate, and generally replicable, with thoughtful condition design and justification for the chosen analytical approach.
- A few background sections add context but slightly dilute the immediacy of the investigation’s purpose.
- Some variables, especially oxygen and temperature, are operationalized through proxies rather than directly measured.
- A little more precision in monitoring and controlling the storage conditions would make the design even stronger.
Criteria B: Knowledge and Understanding
5/6
0
3
6
Criteria Strands
B.1Application of source material
Excellent
B.2Subject knowledge
Excellent
B.3Use of terminology and concepts
Excellent
Criteria Feedback
- You show solid chemistry understanding across redox reactions, degradation pathways, kinetics, and temperature dependence.
- You use subject-specific terminology accurately and consistently in a way that supports your reasoning.
- You apply source material effectively to explain mechanisms and to support your interpretation of the results.
- A few chemical explanations could be more precise, especially where structural terminology or endpoint chemistry is described.
- Some background sources are broader or less authoritative than ideal, which slightly weakens the overall academic strength of the evidence base.
- Your interpretation would be even stronger if all mechanistic claims were matched with the most direct and rigorous sources available.
Criteria C: Critical Thinking
10/12
0
6
12
Criteria Strands
C.1Research quality
Good
C.2Analysis depth
Good
C.3Discussion and evaluation
Good
Criteria Feedback
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- 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.
Criteria D: Presentation
3/4
0
2
4
Criteria Strands
D.1Structure appropriateness
Excellent
D.2Layout considerations
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.