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5 Types of Chemical Reactions

Here are 5 types of chemical reactions, and what to expect the products to be.

There are many different types of chemical reactions, here I will tell you about 5 of them.

1. Synthesis Reaction: In a synthesis reaction, two substances (polyatomic atom, atom) are combined to form one compound. This can be an element and an element to creat a binary compound, a metal oxide and water to create metal hydroxide (or a base), and a nonmetal oxide and water to creat an acid.

Here is an example of a Synthesis Reaction:

As you can see, the Hydrogen and Oxygen are two elements on the left side of the arrow, or the reactants, and the water molecule is on the right side, which is the product of a synthesis reaction.

2. Decomposition Reaction: this is a reaction where one compound froms two or more substances. Examples of a decomposition reaction include: A binary compound breaking into an element and another element; a metal hydroxide breaking into metal oxide and water; an acid breaking into a nonmetal oxide and water; a substance and carbonate which breaks into that substance oxide and carbon dioxide; and lastly, a substance and chlorate that breaks into that substnace chloride and oxygen.

Here is an example of a Decomposition Reaction:In this example, the water molecule breaks into the hydrogen molecules and the oxygen molecules-what it is composed of.

3. Single Replacement Reaction: this is when you have one element and one compound in the reaction, and the product of the reaction would be the one element replacesone of the elements in the compound. If the single element in the reaction is a metal, than it would replace the metal in the compound. If the single element is a nonmetal, than it will replace the nonmetal in the compound.

Here is an example of a Single Replacement Reaction: Here you can see that Magnesium replaces Hydrogen in water to make magnesium hydroxide and Hydrogen gas. The one element, replaces the other that is in the compound.

4. Double Displacement (or Double Replacement) Reaction: In this reaction, you start out with two compounds on the reaction side, and you end with two compounds on the product side. The replacing occurs with cations, or the positive ions. The cation from one compound replace the cation from the other and than you have your product. If an acid reacts with a base (neutralization), one of the products is always water.

Here is an example of a Double Displacement reaction: As you can see, there are two compounds on the reactant side of the equation. The cations switch, making the product two different compounds as the product.

5. Combustion Reaction: This is when the reactant side has a compound plus oxygen. It's commonly referred to as burning, and the end product is carbon dioxide and water. It is an exothermic reaction; this means that another product is heat.

Here is an example of a Combustion Reaction: Here, methanol is burned, or reacts with Oxygen gas, and the product of this reaction is Carbon Dioxide and Water (or Dihydrogen Monoxide).

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