1. Rinse ORP probe with deionised water and blot dry.
2. Place 1000 mL baker on the magnetic stirrer place. Gradually pour the bleach solution into
burrette and hang the burette onto the stand. Turn on magnetic stirrer.
3. Immerse the ORP and the pH probes into the deaerated water, record the initial ORP and pH of
solution.
4. Gradually drop the bleach solution into water. Record the values of ORP, pH and volume of
bleach solution used. Repeat until achieving the equilibrium.