To what extent does the ethanol content (0%, 10%, 30%, 50%, 70%, and 90%) in simulated perfumes influence their vapor pressure difference compared with atmospheric pressure, at a set temperature of 30 °C?SL
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B
Official IB Result
IB Grade: B
Criteria A: Focus and Method
5/6
0
3
6
Criteria Strands
A.1Topic communication and explanation
Excellent
A.2Research question formulation and focus
Excellent
A.3Research methodology
Moderate
Criteria Feedback
- You communicate a clear chemistry investigation with a specific real-world context.
- Your research question is explicit, quantitative, and tightly connected to the procedure and data.
- You show purposeful planning with a substantial method, controlled variables, and multiple trials.
- The discussion briefly drifts into a secondary commercial comparison that weakens the overall focus.
- The method does not fully justify the chosen system because the essential oil and layering complicate the chemistry being measured.
- Some procedural choices are described confidently even though the setup does not fully support the claims being made about control and equilibrium.
Criteria B: Knowledge and Understanding
4/6
0
3
6
Criteria Strands
B.1Application of source material
Moderate
B.2Subject knowledge
Moderate
B.3Use of terminology and concepts
Moderate
Criteria Feedback
- You use relevant chemistry terminology consistently, including intermolecular forces, vapor pressure, mole fraction, and Raoult’s law.
- You apply source material in a way that gives the investigation a coherent scientific foundation.
- Your explanation of the background chemistry shows clear understanding of the relationship between composition and volatility.
- Some terms are used imprecisely, especially where pressure change is treated as if it automatically equals equilibrium vapor pressure.
- The discussion sometimes overstates what the model can explain, particularly when ideal assumptions are applied to a non-ideal system.
- A few source-based claims and calculations do not fully match the actual mixture used in the experiment.
Criteria C: Critical Thinking
9/12
0
6
12
Criteria Strands
C.1Research quality
Poor
C.2Analysis depth
Poor
C.3Discussion and evaluation
Poor
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
Good
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.