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Chemical reaction classification


Chemical reactions can be classified in several ways. The most common is the one that uses as a parameter the types of reactant and resulting substances.

Synthesis or Addition

In this reaction, two or more reagents (A and B) combine to form only one product (AB).

Some examples:

Analysis or decomposition

It is the reaction in which only one reagent (AB) produces two or more products (A and B).

Some examples:

Simple change or shift

It is the reaction in which a simple substance combines with a compound substance, forming another simple substance and a compound one.

or

Some examples:

Double exchange or permutation

In this type of reaction there is an exchange between two compound substances that combine, forming two other compound substances.

Some examples:

Condition for a chemical reaction to occur

For two or more substances to react chemically, the following conditions are required:

  • your molecules should be arranged so as to make the most contact possible. Generally gaseous substances react faster and easier than solid-state substances;
  • reagents must have chemical affinity, that is, a certain "tendency to react" to each other.