Types of chemical reactions.
1) Decomposition reaction. Complex substance = simple substance + other simple substance or complex substance = other complex substance 1 + complex substance 2.
2) The reaction of the connection. Simple substance 1 + simple substance 2 = complex substance. Or complex substance 1 + complex substance 2 = complex substance 3.
3) Reaction of exchange. Compound 1 + Compound 2 = Compound 3 + Compound 4.
4) Substitution reaction. Simple substance 1 + complex substance = simple substance 2 + complex substance 2.
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