* Reactants: You have potassium bromide (KBr) and chlorine gas (Cl₂).

* Products: You have potassium chloride (KCl) and bromine gas (Br₂).

The Key: Chlorine (Cl₂) is more reactive than bromine (Br₂). This means chlorine can displace bromine from its compound (KBr).

Here's the breakdown:

1. Chlorine (Cl₂) reacts with potassium bromide (KBr).

2. Chlorine (Cl₂) being more reactive, replaces bromine (Br₂) in the compound.

3. This results in the formation of potassium chloride (KCl) and bromine gas (Br₂).

General Formula for Single Displacement Reactions:

A + BC → AC + B

In this case:

* A = Cl₂ (chlorine)

* B = Br₂ (bromine)

* C = K (potassium)

Let me know if you'd like more examples or explanations of chemical reactions!