Here's the unbalanced chemical equation for the reaction of potassium bromide (KBr) and barium iodide (BaI₂) to produce potassium iodide (KI) and barium bromide (BaBr₂):

KBr + BaI₂ → KI + BaBr₂

This equation is unbalanced because the number of atoms of each element on the reactant side (left) does not equal the number of atoms of each element on the product side (right).