In this lesson we will learn how the products of chemical reactions can often be predicted, by classifying reactions into different types, based on the way atoms are rearranged.
By the end of this lesson you will be able to:
- Identify the following types of chemical reactions:
- Single displacement
- Double displacement (precipitation and neutralisation)
- Combustion (complete and incomplete)
- Predict the products of the following types of chemical reactions:
- Single displacement
- Complete combustion.
- Identify the reducing agent and the oxidising agent in a redox reaction.
(Image: FotoshopTofs, Pixabay)
- Chemical reactions can be classified in different ways, based on the way atoms and molecules are rearranged during the reaction.
- Classifying chemical reactions can make it possible to predict their products.
- Combination reactions involve two or more reactants combining to form one product.
- A + B → AB
- Decomposition reactions involve one reactant breaking down to form two or more products.
- AB → A + B
- Single displacement reactions involve an element and a compound reacting to form a different element and compound.
- A + BC → AC + B
- Double displacement reactions involve two compounds reacting to form two different compounds.
- AB + CD → AD + CB
- Complete combustion reactions involve the burning of hydrocarbons, where the supply of oxygen is not limited.
- CxHy + O2 → CO2 + H2O
- Incomplete combustion reactions involve the burning of hydrocarbons, where the supply of oxygen is limited.
- CxHy + O2 → CO + H2O
- CxHy + O2 → C + H2O
- Redox reactions involve simultaneous oxidation and reduction reactions.
- An oxidation reaction involves the loss of oxygen or the gain of electrons.
- A reduction reaction involves the gain of oxygen or the loss of electrons.
- The species that is oxidised during a redox reaction is know as the reducing agent.
- The species that is reduced during a redox reaction is know as the oxidising agent.
- Combustion reactions, single displacement reactions, and most combination and decomposition reactions are examples of redox reactions.
(Image: Inna, Adobe Stock)
(Header image: vadimborkin, Adobe Stock)