• Many chemical reactions can be categorized because of the reactants they use or the products they form. There are many types including neutralization, combustion, displacement, decomposition and metathesis.
reactions are identified by the use of an acid and an alkali.
• Along with water, a neutralization reaction will produce a salt, comprised of the metal ion(s) of the alkali and the negative ion(s) of the acid involved. These are the remaining compound fragments that did not form water.
reactions are defined by the use of oxygen gas
to react with one other chemical. Combustion of hydrocarbons
is a very common reaction, and is how most cars generate power.
reactions involve an atom or groups of atoms being exchanged
’ from a chemical compound.
• Displacement reactions involve a metal (or non-metal) in elemental form e.g. Mg (or Cl
) and a metal (or non-metal) in a salt (e.g. ZnBr
) where the two metals (or non-metals) exchange.
reactions involve atoms or groups of atoms being exchanged
between two different chemical compounds
containing both metal and non-metal ions. It is similar do a displacement reaction except two compounds are involved, not one.
reactions involve one chemical compound reactant
breaking down into two or more products
which were originally part of the starting compound.
• Decomposition reactions are easy to spot – they normally only have one reactant which is the compound that is decomposing!
In this lesson, we will learn:
• To analyze
chemical reactions in terms of the reactants and products involved.
• To understand
the value of categorizing reactions in chemistry.
• To predict
the products of chemical reactions based on the reactants involved.