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Tutorial Index

Introduction to Elements, Atoms, Molecules,
Compounds and Chemical Bonding

Introduction to Chemical Bonding
Metals, Non-metals and Compounds
Non-metal Radical Groups
Names of Acids and other compounds
Introduction to Chemical Reactions, the
Rules and the products of a reaction

Types of Chemical Reactions I
Introduction to the Periodic Table
Using Chemical Formulae
Balancing Chemical Equations

The Chapters Index

 

Types of Reactions : Precipitate Reactions

Can you identify the reactants and the products shown in the equations?

 

Test Yourself
(Opens a new window)

Exercise VII
(Opens a new window)

 

 

THE LANGUAGE OF CHEMISTRY

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Types of Reactions : Combustion

A fuel is a chemical or a mixture of chemicals that burns in the oxygen gas in the air liberating thermal energy. Most fuels are fossil fuels, such as natural gas and petroleum. These are made of carbon compounds which originated from organisms that lived millions of years ago.

The products of combustion are carbon dioxide and water. The example below shows the gas methane burning in oxygen. Methane is found in natural gas.

 

Combustion

 

Methane is a molecule made from the chemical bonding between one carbon atom and four hydrogen atoms. This reaction needs to be ignited before it will take place. Once ignited, however, the reaction produces a great deal of thermal energy.

 

Types of Reactions : Precipitate Reactions

In this type of reaction two solutions mixed together make one product which is insoluble. This product comes out of the solution and can be seen as a solid mass in the test tube.

 

Reaction02

 

In the reaction above sodium hydroxide solution is added to a solution of copper II nitrate. There are two products. Sodium nitrate is soluble and remains in solution. The copper II hydroxide, however, is insoluble and comes out of the solution. In this particular case the precipitate has a light blue colour.

 

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