IB Chemistry SL Internal Assessment Example

The student presents a focused, testable question and gives enough electrochemical background to show why the investigation matters.

The student identifies several relevant controls and provides a procedure with quantities and a logical sequence of steps.

The student's method is detailed enough to follow in broad terms, including the cell setup and repeated measurements.

The investigation scope is not fully consistent because the title and question do not match cleanly.

The independent variable is not isolated well, since changing the salt changes more than ionic radius.

Several important procedural details are missing, so another student could not reproduce the work without making assumptions.

The student organizes the processed data clearly with tables, graphs, labels, and a visible attempt to show the relationship between variables.

The student carries out relevant calculations such as averages, a regression line, and the standard cell potential.

The student shows some awareness of uncertainty by including error bars and discussing possible sources of variation.

Some processed values are inconsistent or mislabeled, which weakens trust in the presentation of the results.

The uncertainty treatment is incomplete and in places not well justified.

The processing does not fully handle the repeated trials in a way that makes the analysis easy to verify.