Chlorine's Reaction with Bromide Ions
* Reaction: Chlorine (Cl₂) is a stronger oxidizing agent than bromine (Br₂). When chlorine reacts with bromide ions (Br⁻), it oxidizes the bromide ions to bromine.
* Color Change: The solution will turn from colorless (bromide ions) to orange-brown (bromine).
* Equation: Cl₂(aq) + 2Br⁻(aq) → 2Cl⁻(aq) + Br₂(aq)
Chlorine's Reaction with Iodide Ions
* Reaction: Chlorine (Cl₂) is a stronger oxidizing agent than iodine (I₂). When chlorine reacts with iodide ions (I⁻), it oxidizes the iodide ions to iodine.
* Color Change: The solution will turn from colorless (iodide ions) to brown-red (iodine).
* Equation: Cl₂(aq) + 2I⁻(aq) → 2Cl⁻(aq) + I₂(aq)
Key Point: These reactions demonstrate the relative strengths of the halogens as oxidizing agents. Chlorine is the strongest, followed by bromine, and then iodine.
