5 TYPES OF REACTIONS:

Synthesis:

• A reaction in which two or more elements or compounds combine to form a single product.
• Ex.) 2Na+Cl2----> 2NaCl
• Here they are taking sodium and chloride and combining them together to make sodium chloride. This is a covalent bond.

Decomposition:

• A single reactant, a compound, breaks into two or more parts.
• Ex.) CaCO3--->CaO+CO2
• In this reaction the calcium carbonate breaks down into calcium oxide and carbon dioxide. This is a covalent bond also.

Combustion:

• Often a hydrocarbon is burned in the presence of oxygen gas to form carbon dioxide or carbon monoxide.
• Ex.)CH4+2O2-->CO2+2H2O
• In this reaction carbon dioxide is released.
• This is a covalent bond.

Double Displacement:

• Two compounds react to form two new compounds.
• Ex.)HCL+NaOH->H2O+NaCl
• In this reaction hydrogen chloride reacts with sodium hydroxide to form water and sodium chloride.
• It is a covalent bond.

Single Displacement:

• A more active element replaces a less active element in a compound.
• Ex.) Fe+CuSO4->Cu+FeSO4
• In this reaction the iron and the copper replace each other and take over the new spot on the right side of the equation.
• This is an ionic compound.