Chemistry IA Exemplar: How‬‭ does‬‭ the‬‭ duration‬‭ of‬‭ boiling‬‭… | RevisionDojo

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IB Chemistry SL Internal Assessment Example

How‬‭ does‬‭ the‬‭ duration‬‭ of‬‭ boiling‬‭ (0,‬‭ 2,‬‭ 4,‬‭ 6,‬‭ 8,‬‭ 10‬‭ ‬minutes)‬‭±‭ 0‬ .‭ 01‬‭ ‬‭ 𝑠 affect‬ the‬‭ vitamin‬‭ C‬‭ content‬‭ (mg/100‬‭ g)‬‭ in‬‭ spinach,‬‭ as‬‭ determined‬‭ by‬‭ redox‬‭ titration‬‭ using‬‭ 0.005‬±‭ 0‬ .‭ 779%‬ M iodine solution and starch indicator?‬SL

Overall Score

22/24

Criteria A: Research Design

6/6

Criteria Strands

A.1Research question context

Excellent

A.2Methodological considerations

Good

A.3Methodology description

Good

Criteria Feedback

Your research question is focused, measurable, and clearly identifies the variable, sample, and method.
You give a strong chemical rationale for the investigation, especially in the explanation of ascorbic acid and the iodine titration.
You include relevant practical and personal context that helps justify why the investigation matters.

Some methodological choices are explained well but not fully justified in terms of why they are the best options.
A few procedural details are still ambiguous enough to reduce complete reproducibility.
The design would be stronger if it addressed validity issues such as leaching and the use of repeated titrations from the same extract.

Criteria B: Data Analysis

6/6

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 enough that the calculation trail can be followed.
You use appropriate numerical processing, including means, stoichiometric conversion, and final vitamin C content values.
You make a meaningful effort to show uncertainty through ranges, propagated values, and error bars.

Some processing choices create more confidence in the trend than the data can really support.
A few calculations and explanations could be presented more cleanly so the logic is easier to verify.
Your uncertainty treatment does not fully include all important systematic effects and measurement steps.

Criteria C: Conclusion

6/6

Criteria Strands

C.1Conclusion relevance and support

Good

C.2Scientific context comparison

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: Evaluation

4/6

Criteria Strands

D.1Methodological weaknesses

Good

D.2Suggested improvements

Excellent

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.

Loading scores...

Overall Score

22/24

Criteria A: Research Design

6/6

Criteria Strands

A.1Research question context

Excellent

A.2Methodological considerations

Good

A.3Methodology description

Good

Criteria Feedback

Your research question is focused, measurable, and clearly identifies the variable, sample, and method.
You give a strong chemical rationale for the investigation, especially in the explanation of ascorbic acid and the iodine titration.
You include relevant practical and personal context that helps justify why the investigation matters.

Some methodological choices are explained well but not fully justified in terms of why they are the best options.
A few procedural details are still ambiguous enough to reduce complete reproducibility.
The design would be stronger if it addressed validity issues such as leaching and the use of repeated titrations from the same extract.

Criteria B: Data Analysis

6/6

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 enough that the calculation trail can be followed.
You use appropriate numerical processing, including means, stoichiometric conversion, and final vitamin C content values.
You make a meaningful effort to show uncertainty through ranges, propagated values, and error bars.

Some processing choices create more confidence in the trend than the data can really support.
A few calculations and explanations could be presented more cleanly so the logic is easier to verify.
Your uncertainty treatment does not fully include all important systematic effects and measurement steps.

Criteria C: Conclusion

6/6

Criteria Strands

C.1Conclusion relevance and support

Good

C.2Scientific context comparison

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.

Criteria D: Evaluation

4/6

Criteria Strands

D.1Methodological weaknesses

Good

D.2Suggested improvements

Excellent

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.