Understanding Chemical Reaction Types LG5

A single compound breaks down into two or more simpler substances.

Two or more substances combine to form a single new substance.

An element replaces another element in a compound.

A reaction that produces only gases.

Two elements combine to form a compound.

A compound breaks down into two or more simpler substances.

An element replaces another element in a compound.

Two compounds exchange ions.

$$2H_2O \rightarrow 2H_2 + O_2$$

$$2H_2 + O_2 \rightarrow 2H_2O$$

$$Zn + CuSO_4 \rightarrow ZnSO_4 + Cu$$

$$AgNO_3 + NaCl \rightarrow AgCl + NaNO_3$$

Synthesis

Decomposition

Displacement

Combustion

Two elements combine to form a compound.

A compound breaks down into elements.

An element replaces another element in a compound.

Two compounds exchange ions.

$$2Na + Cl_2 \rightarrow 2NaCl$$

$$CaCO_3 \rightarrow CaO + CO_2$$

$$Zn + 2HCl \rightarrow ZnCl_2 + H_2$$

$$Fe + S \rightarrow FeS$$

Synthesis

Decomposition

Displacement

Neutralisation

Atoms are split apart into smaller pieces.

Atoms from two or more reactants combine to form a single product.

Atoms are exchanged between two compounds.

Atoms are lost from the system.

One reactant

Two or more products

Two reactants

Breaking down of a compound

$$2Mg + O_2 \rightarrow 2MgO$$

$$2H_2O_2 \rightarrow 2H_2O + O_2$$

$$Fe + CuSO_4 \rightarrow FeSO_4 + Cu$$

$$NaCl + AgNO_3 \rightarrow AgCl + NaNO_3$$