* Reactivity Series: Iodine is less reactive than bromine. This means that iodine is more likely to lose electrons and become an ion (I-) compared to bromine.
* Displacement Reaction: In a displacement reaction, a more reactive element displaces a less reactive element from its compound.
* The Reaction: When iodine is added to a solution of potassium bromide, the following reaction occurs:
```
I2(s) + 2KBr(aq) → 2KI(aq) + Br2(l)
```
* Observations: You would observe the formation of a brown/reddish liquid, which is elemental bromine (Br2), and a colorless solution of potassium iodide (KI).
In summary: Iodine is more reactive than bromine, so it can displace bromine from a solution of potassium bromide. This is a classic example of a displacement reaction.
