The reaction between zinc and iron chloride can be represented by the following equation:

Zn + FeCl2 → ZnCl2 + Fe

In this reaction, zinc atoms lose two electrons to become zinc ions (Zn2+), while iron ions (Fe2+) in iron chloride gain those electrons to become iron atoms (Fe). As a result, zinc chloride (ZnCl2) is formed as a soluble salt, while iron is produced as a precipitate.

Therefore, the precipitate formed in this reaction is iron (Fe).