Question

Balance and classify the following reaction
Cl2(aq) + KBr(aq) → Br2(aq) + KCl(aq)

Answer 1

The given reaction is rather obvious to balance. You have to put 2 at KBr and KCl:

$Cl_{2}(aq)+2KBr(aq) \rightarrow Br_{2}(aq)+2KCl(aq)$

It is substitution or single-displacement reaction (A + BC = AC + B).