Sort the chemical equation to the chemical reaction they represent.

Synthesis Decomposition

(water → hydrogen + oxygen) (iron + oxygen → iron oxide) (sodium + chlorine →

sodium chloride) (sulfur + oxygen →

sulfur dioxide) (potassium + chlorine →

potassium chloride) (calcium carbonate →

calcium oxide + carbon dioxide)

The left side of the equation is the reactant side and the right side is the product side. When two elements are reacting on the left side to produce a compound, that is a synthesis reaction. When a compound on the reactant side is broken down into different elements on the product side, that is a decomposition reaction.

water = hydrogen + oxygen (decomposition)

Iron + oxygen = iron oxide (synthesis)

sodium + chlorine = sodium chloride (synthesis)

sulfur + oxygen = sulfur dioxide (synthesis)

potassium + chlorine = potassium chloride (synthesis)

calcium carbonate = calcium oxide + carbon dioxide (decomposition)