Chemistry IA Exemplar: What is the effect of changing temperature… | RevisionDojo

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IB Chemistry SL Internal Assessment Example

What is the effect of changing temperature (20.0, 30.0, 40.0, 50.0, and 60.0 °C) on the rate of reaction between magnesium and hydrochloric acid, measured by recording the pressure change at varying temperatures, and used to calculate the activation energy?SL

Overall Score

20/24

Criteria A: Research Design

6/6

Criteria Strands

A.1Research question context

Excellent

A.2Methodological considerations

Excellent

A.3Methodology description

Good

Criteria Feedback

You defined a focused investigation with a clear temperature range, named reactants, and an appropriate activation-energy purpose.
Your background links collision theory, the Arrhenius equation, and pressure monitoring in a scientifically relevant way.
Your method is logically organised and includes several sensible controls, repeats, and safety considerations.

The rationale for using the pressure-change rate as a kinetic proxy needs to be explained more carefully.
The preparation of magnesium is not fully reproducible because the fixed length and fixed mass are not securely reconciled.
Some operational details, such as the timing of data collection and the exact endpoint rule, need to be stated more precisely.

Criteria B: Data Analysis

6/6

Criteria Strands

B.1Communication of data recording and processing

Good

B.2Consideration of uncertainties

Good

B.3Data processing quality

Poor

Criteria Feedback

You present the raw and processed results in an organised way with tables, averages, units, and sample calculations.
You make a clear attempt to show how the pressure data were processed into a usable rate measure.
You consider uncertainty through repeated trials, half-range estimates, instrumental precision, and error bars on the Arrhenius plot.

The pressure logger data are not shown in full, so the reader cannot verify the time-resolved processing path.
The conversion from pressure-rate data into a rate constant is not properly justified, which weakens the kinetic interpretation.
Some uncertainty handling is incomplete or inconsistent, especially for temperature, timing, endpoint choice, and the final gradient conversion.

Criteria C: Conclusion

3/6

Criteria Strands

C.1Conclusion relevance and support

Moderate

C.2Scientific context comparison

Moderate

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

5/6

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

20/24

Criteria A: Research Design

6/6

Criteria Strands

A.1Research question context

Excellent

A.2Methodological considerations

Excellent

A.3Methodology description

Good

Criteria Feedback

You defined a focused investigation with a clear temperature range, named reactants, and an appropriate activation-energy purpose.
Your background links collision theory, the Arrhenius equation, and pressure monitoring in a scientifically relevant way.
Your method is logically organised and includes several sensible controls, repeats, and safety considerations.

The rationale for using the pressure-change rate as a kinetic proxy needs to be explained more carefully.
The preparation of magnesium is not fully reproducible because the fixed length and fixed mass are not securely reconciled.
Some operational details, such as the timing of data collection and the exact endpoint rule, need to be stated more precisely.

Criteria B: Data Analysis

6/6

Criteria Strands

B.1Communication of data recording and processing

Good

B.2Consideration of uncertainties

Good

B.3Data processing quality

Poor

Criteria Feedback

You present the raw and processed results in an organised way with tables, averages, units, and sample calculations.
You make a clear attempt to show how the pressure data were processed into a usable rate measure.
You consider uncertainty through repeated trials, half-range estimates, instrumental precision, and error bars on the Arrhenius plot.

The pressure logger data are not shown in full, so the reader cannot verify the time-resolved processing path.
The conversion from pressure-rate data into a rate constant is not properly justified, which weakens the kinetic interpretation.
Some uncertainty handling is incomplete or inconsistent, especially for temperature, timing, endpoint choice, and the final gradient conversion.

Criteria C: Conclusion

3/6

Criteria Strands

C.1Conclusion relevance and support

Moderate

C.2Scientific context comparison

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: Evaluation

5/6

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.