Classifying Chemical Reactions

Note that ‘React with chemically’ may be captured adequately by (combine)chemicals) [though I am less sure how to address nuclear reactions].

Particular reactions can be captured through reference to the resulting compound(s) (and sometimes also originating compound(s)), and perhaps the chemical bonds involved. The speed of reaction can be denoted by reference to QT. More particular chemical processes may best be captured through links to a classification of chemical entities: ‘nucleate’ is (create)(a nucleus); ‘flocculate’ is (transforming)(creates)(small clumps). Note that neutralize has a specific chemical meaning distinct from the more general ‘cause to be ineffective.’

Still, we need to allow the classification somewhere of types of reaction (as linked notation will likely prove too cumbersome in most cases):

· Direct Combination or Synthesis Reaction

In a synthesis reaction two or more chemical species combine to form a more complex product.

A + B → AB

· Chemical Decomposition or Analysis Reaction

In a decomposition reaction a compound is broken into smaller chemical species.

AB → A + B

· Single Displacement or Substitution Reaction

A substitution or single displacement reaction is characterized by one element being displaced from a compound by another element.

A + BC → AC + B

· Metathesis or Double Displacement Reaction

In a double displacement or metathesis reaction two compounds exchange bonds or ions in order to form different compounds.

AB + CD → AD + CB

· Acid-Base Reaction

An acid-base reaction is type of double displacement reaction that occurs between an acid and a base. The H⁺ ion in the acid reacts with the OH^- ion in the base to form water and an ionic salt:

HA + BOH → H₂O + BA

· Oxidation-Reduction or Redox Reaction

In a redox reaction the oxidation numbers of atoms are changed. Redox reactions may involve the transfer of electrons between chemical species.

· Combustion

A combustion reaction is a type of redox reaction in which a combustible material combines with an oxidizer to form oxidized products and generate heat.

· Isomerization

In an isomerization reaction, the stuctural arrangement of a compound is changed but its net atomic composition remains the same.

· Hydrolysis Reaction

A hydrolysis reaction involves water.