IB Chemistry HL Internal Assessment Example

You state a focused, testable research question and place it in a relevant kinetic context.

You include practical planning details such as concentration range, repeated trials, fixed quantities, and use of a gas syringe.

Some key assumptions are introduced too early, such as treating the reaction as first order before the data establish that.

There are internal inconsistencies in the planned concentrations and reaction volumes, which reduce reproducibility.

The method does not fully explain how the measured gas-volume data become a chemically meaningful rate.

You present data in a structured way with labelled tables, averages, and graphs that are generally easy to follow.

You make a genuine attempt to consider uncertainty through repeat trials, instrument uncertainties, and error bars.

You show an organized processing sequence from raw readings to derived gradients and comparison across concentrations.

The processing does not complete the planned conversion from gas volume to moles and concentration change, so the reported rate is not yet in the correct chemical form.

Several raw datasets appear duplicated or inconsistent across different concentrations, which seriously weakens confidence in the analysis.

The uncertainty treatment is incomplete because the slope uncertainty is not propagated appropriately from the raw measurements.