Iodine Clock Kinetics Lab

Volume of KIO₃ ($V_A$)

10 mL

*Increasing concentration increases rate.

Solution A Potassium Iodate

Solution B Sodium Sulphite + Starch

The reaction occurs in two steps. The slow step generates Iodine ($I_2$), which is immediately consumed by Sulphite ions.

Rate = k[IO₃⁻]ⁿ

Once Sulphite is exhausted, the free Iodine reacts with Starch to form a blue-black complex instantly.

Magnetic Stirrer

Reaction Time

0.00 s

Observations Log

Vol (mL)	Time (s)	Rate ($s^{-1}$)