Investigating the Influence of Dilution on the Degradation of Sodium Hypochlorite in Household Bleach via Iodometric Redox Titration

This investigation explores how varying degrees of dilution influence the degradation of sodium hypochlorite in commercial household bleach. The central hypothesis posits that increased dilution accelerates the decomposition of NaOCl.

Using iodometric redox titration with sodium thiosulfate, the concentration of NaOCl was determined across five dilution levels. The results demonstrated a strong positive correlation (R² ≈ 0.985), confirming that more dilute solutions exhibit higher rates of degradation.

The exemplar is distinguished by its rigorous mathematical treatment, including detailed uncertainty propagation and a comprehensive evaluation of systematic and random errors, such as parallax error and inconsistent mixing, providing a high-quality model for quantitative chemical analysis.