IB Chemistry SL Internal Assessment Example

The student's research question is focused and measurable, and it clearly identifies the variables, temperature range, and intended Arrhenius outcome.

The student includes relevant scientific background that helps situate the investigation within collision theory and temperature dependence.

The student's procedure has a clear overall sequence and uses repeated trials, which supports a structured investigation.

Some of the scientific background is not fully accurate, which weakens the precision of the investigation framing.

The temperature control method is not fully secure because the actual reaction mixture temperature after mixing is not clearly established.

Several steps would be difficult to reproduce exactly because the procedure leaves important details ambiguous.

The student presents complete raw data across all temperatures and repeats, which gives the analysis a solid evidential base.

The student's calculations are generally organised clearly, including means, reciprocal temperature, and logarithmic transformation.

The student does show some awareness of uncertainty through stated measurement uncertainties and repeated trials.

The endpoint-derived rate proxy is treated too much like a true rate constant without enough justification.

Uncertainty is considered, but it is not propagated thoroughly through the key processed values or final result.

Some of the reporting is imprecise, especially around units and the interpretation of the calculated activation energy.