Neutralization: The products are always salt and water.
Synthesis: The reaction has at least two reactants and one product.
Combustion: Oxygen is one of the reactants, and a large amount of energy is released.
Replacement: One or more atoms replace a part of a compound.
Decomposition: The reaction has one reactant and at least two products.
Neutralization reactions typically occur between an acid and a base. The hydrogen ions from the acid react with the hydroxide ions from the base to form water, and the remaining ions combine to form salt.
The reaction has at least two reactants and one product. Synthesis reactions involve the combination of two or more substances to form a new, more complex substance. They have multiple reactants and produce a single product.