IB Chemistry IA Grader — Free AI Feedback on Your Lab Report
IBLens grades your IB Chemistry Internal Assessment against the official IB Chemistry IA rubric — all five criteria — in 60 seconds. Get feedback on Personal Engagement, Exploration, Analysis, Evaluation, and Communication. First analysis is free.
IB Chemistry IA rubric (24 marks)
The Chemistry IA uses the same five criteria as other science IAs, but Chemistry-specific expectations apply:
- Personal Engagement (2 marks): Specific personal connection to the chemistry topic, not generic interest statements.
- Exploration (6 marks): Focused research question with clearly identified independent, dependent, and controlled variables. Safety and ethical considerations for chemical procedures.
- Analysis (6 marks): Correct propagation of uncertainties through calculations, appropriate significant figures, and correct chemical equations where relevant.
- Evaluation (6 marks): Discussion of systematic and random errors, their effect on your result, and realistic improvements specific to your method.
- Communication (4 marks): Correct chemical notation, SI units, and clear labelling of all apparatus diagrams.
Common IB Chemistry IA mistakes
- Incorrect uncertainty propagation: Not using the correct rules (addition/subtraction vs multiplication/division) when propagating uncertainties through multi-step calculations.
- Too few repeats: Chemistry IAs require at minimum 5 data points to demonstrate a trend. Fewer data points significantly limits your Analysis score.
- Confusing systematic and random errors: Listing "human reaction time" as a systematic error rather than a random one, or vice versa. IBLens checks whether your error analysis uses correct terminology.
- Missing or incorrect chemical equations: If your investigation involves a chemical reaction, the balanced equation must be present and correct.
Frequently asked questions
- Is the Chemistry IA grader free?
- Your first analysis is completely free — no account needed. Additional analyses cost $4.99 each.
- Can I use this for IB Chemistry EE?
- For Chemistry Extended Essays, use the Extended Essay grader and select Chemistry as your subject. See also our IB Chemistry EE guide.