Chemistry Extended Essay Exemplar: Synthetic Food Colorants in… | RevisionDojo

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IB Chemistry SL Extended Essay Example

To what extent are the synthetic food colorants Allura Red (CI 16035), Ponceau 4R (CI 16255), and Sunset Yellow FCF (CI 15985) present in tomato sauce samples from street food vendors in Lakarsantri, Surabaya analyzed through Paper Chromatography?SL

Official IB Result

IB Grade: B

Criteria A: Focus and Method

5/6

Criteria Strands

A.1Topic communication and explanation

Excellent

A.2Research question formulation and focus

Good

A.3Research methodology

Good

Criteria Feedback

You communicate the investigation clearly and keep the reader oriented throughout the report.
Your research question is specific to a real local context and is closely linked to the method you used.
You include a sensible experimental workflow with standards, repeats, and data processing.

The wording of the research question suggests a level of quantification that the data do not fully support.
Some methodological choices, especially the extraction and solvent choice, are not fully justified chemically.
The method would be stronger if the comparison rule for identifying a match were stated more explicitly.

Criteria B: Knowledge and Understanding

5/6

Criteria Strands

B.1Application of source material

Good

B.2Subject knowledge

Good

B.3Use of terminology and concepts

Excellent

Criteria Feedback

You show clear understanding of chromatography and dye chemistry.
You use subject-specific terminology accurately and consistently in most places.
You apply source material effectively to explain the background and support the scientific rationale.

Some chemical explanations do not fully support the experimental method you chose.
The justification for the solvent system is limited.
The source material is not always used to validate the most important method decisions.

Criteria C: Critical Thinking

9/12

Criteria Strands

C.1Research quality

Good

C.2Analysis depth

Moderate

C.3Discussion and evaluation

Moderate

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: Presentation

2/4

Criteria Strands

D.1Structure appropriateness

Excellent

D.2Layout considerations

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...

Official IB Result

IB Grade: B

Criteria A: Focus and Method

5/6

Criteria Strands

A.1Topic communication and explanation

Excellent

A.2Research question formulation and focus

Good

A.3Research methodology

Good

Criteria Feedback

You communicate the investigation clearly and keep the reader oriented throughout the report.
Your research question is specific to a real local context and is closely linked to the method you used.
You include a sensible experimental workflow with standards, repeats, and data processing.

The wording of the research question suggests a level of quantification that the data do not fully support.
Some methodological choices, especially the extraction and solvent choice, are not fully justified chemically.
The method would be stronger if the comparison rule for identifying a match were stated more explicitly.

Criteria B: Knowledge and Understanding

5/6

Criteria Strands

B.1Application of source material

Good

B.2Subject knowledge

Good

B.3Use of terminology and concepts

Excellent

Criteria Feedback

You show clear understanding of chromatography and dye chemistry.
You use subject-specific terminology accurately and consistently in most places.
You apply source material effectively to explain the background and support the scientific rationale.

Some chemical explanations do not fully support the experimental method you chose.
The justification for the solvent system is limited.
The source material is not always used to validate the most important method decisions.

Criteria C: Critical Thinking

9/12

Criteria Strands

C.1Research quality

Good

C.2Analysis depth

Moderate

C.3Discussion and evaluation

Moderate

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: Presentation

2/4

Criteria Strands

D.1Structure appropriateness

Excellent

D.2Layout considerations

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.