Chemistry IA Exemplar: How can the concentration (moldm-3) of an…

How can the concentration (moldm-3) of an unknown dilute hydrochloric acid solution be determined by constructing a calibration curve of reaction rate against concentration, using the reaction between 0.100 O.O1M sodium thiosulfate and standard hydrochloric acid solutions of concentrations 0.050, 0.100, 0.150, 0.200, and 0.250 O.O1 (moldm-3)SL

Overall Score

20/24

Criteria A: Research Design

5/6

Criteria Strands

A.1Research question context

Excellent

A.2Methodological considerations

Good

A.3Methodology description

Good

Criteria Feedback

You framed the investigation in a specific and focused chemical context, making the aim and intended method easy to understand.
You included several relevant methodological controls and a procedure detailed enough for another student to follow with only small gaps.

Some control claims are not fully consistent with the method actually described, especially around temperature control and dilution handling.
A few procedural details needed for exact replication are still missing, such as standardized mixing, transfer timing, and observer position.

Criteria B: Data Analysis

6/6

Criteria Strands

B.1Communication of data recording and processing

Moderate

B.2Consideration of uncertainties

Moderate

B.3Data processing quality

Moderate

Criteria Feedback

Your raw and processed data are organized clearly, with repeated trials, means, and calculated rates presented in a way that is easy to follow.
You made a genuine effort to consider uncertainty, including instrument uncertainty and the effect of the visual endpoint.

The uncertainty treatment is incomplete because the dominant visual endpoint uncertainty is not carried through consistently into the processing.
The presentation of graphs and processed results lacks some precision, especially in axis labeling, uncertainty display, and caption accuracy.

Criteria C: Conclusion

5/6

Criteria Strands

C.1Conclusion relevance and support

Good

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

4/6

Criteria Strands

D.1Methodological weaknesses

Excellent

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...

IB Chemistry SL Internal Assessment Example

Criteria Strands

Criteria Feedback

Criteria Strands

Criteria Feedback

Criteria Strands

Criteria Feedback

Criteria Strands

Criteria Feedback

Criteria Strands

Criteria Feedback

Criteria Strands

Criteria Feedback

Criteria Strands

Criteria Feedback

Criteria Strands

Criteria Feedback