Chemistry Extended Essay Exemplar: Eggshell Powder Adsorbent… | RevisionDojo

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IB Chemistry SL Extended Essay Example

“How do varying concentrations of eggshell powder adsorbent (1.00, 2.00, 3.00, 4.00, 5.00 grams) alongside the adsorption duration (5, 10, 15, 20, 25, 30 minutes) affect its efficacy on the concentration of manganese(VII) ions in wastewater?”SL

Official IB Result

IB Grade: A

Criteria A: Focus and Method

6/6

Criteria Strands

A.1Topic communication and explanation

Excellent

A.2Research question formulation and focus

Excellent

A.3Research methodology

Excellent

Criteria Feedback

Accurate and effective communication of the environmental issue and research purpose throughout.
Research question is clearly stated, narrowly focused and revisited in discussion and conclusion.
Comprehensive methodology with justified selection of analytical techniques and clear presentation of variables and uncertainty treatment.

Minor typographical ambiguities in the bracketed RQ values.
Procedural details for pH control and particle‐size characterisation are omitted.

Criteria B: Knowledge and Understanding

6/6

Criteria Strands

B.1Application of source material

Good

B.2Subject knowledge

Good

B.3Use of terminology and concepts

Excellent

Criteria Feedback

Source material is applied clearly to underpin definitions, methods and data interpretation.
Subject knowledge is coherent, with correct deployment of adsorption theory, Beer–Lambert law and redox chemistry.
Terminology and concepts (e.g. adsorption capacity, BET surface area, relative uncertainty) are used accurately and consistently.

Integration of cited literature remains occasionally descriptive rather than critically engaged.
Some chemical equations (redox half‐equations) omit full charge‐balance details.

Criteria C: Critical Thinking

7/12

Criteria Strands

C.1Research quality

Moderate

C.2Analysis depth

Moderate

C.3Discussion and evaluation

Poor

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

4/4

Criteria Strands

D.1Structure appropriateness

Excellent

D.2Layout considerations

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.

Loading scores...

Official IB Result

IB Grade: A

Criteria A: Focus and Method

6/6

Criteria Strands

A.1Topic communication and explanation

Excellent

A.2Research question formulation and focus

Excellent

A.3Research methodology

Excellent

Criteria Feedback

Accurate and effective communication of the environmental issue and research purpose throughout.
Research question is clearly stated, narrowly focused and revisited in discussion and conclusion.
Comprehensive methodology with justified selection of analytical techniques and clear presentation of variables and uncertainty treatment.

Minor typographical ambiguities in the bracketed RQ values.
Procedural details for pH control and particle‐size characterisation are omitted.

Criteria B: Knowledge and Understanding

6/6

Criteria Strands

B.1Application of source material

Good

B.2Subject knowledge

Good

B.3Use of terminology and concepts

Excellent

Criteria Feedback

Source material is applied clearly to underpin definitions, methods and data interpretation.
Subject knowledge is coherent, with correct deployment of adsorption theory, Beer–Lambert law and redox chemistry.
Terminology and concepts (e.g. adsorption capacity, BET surface area, relative uncertainty) are used accurately and consistently.

Integration of cited literature remains occasionally descriptive rather than critically engaged.
Some chemical equations (redox half‐equations) omit full charge‐balance details.

Criteria C: Critical Thinking

7/12

Criteria Strands

C.1Research quality

Moderate

C.2Analysis depth

Moderate

C.3Discussion and evaluation

Poor

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

4/4

Criteria Strands

D.1Structure appropriateness

Excellent

D.2Layout considerations

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.