IB Chemistry Internal Assessment Exemplar: How will changing the concentration of Sodium Thiosulfate - Na₂S₂O₃ (0.05M, 0.075M, 0.1M, 0.125M, 0.15M) affect the rate of reaction (measured qualitatively through timed sulfur production) when reacting with 1M Hydrochloric Acid – HCl? | RevisionDojo