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If 2 or more reactants produce a single product, then a synthesis reaction has occured.
In this reaction, calcium oxide and water combine to form a single product, calcium hydroxide. Such a reaction in which a single product is formed from two or more reactants is known as a combination reaction.
Decomposition
A synthesis reaction or dehydration synthesis, also called a condensation reaction.
Na2O + H2O ---> 2NaOH this is a metal oxide (base) reacting with water to form an alkali
.Ab + c cb + a
.Ab + c cb + a
.Ab + c cb + a
A+B ➝AB
A+B ➝AB
Ab->a+b
In decomposition reaction, single reactant will breakdown to form two or more products.
If 2 or more reactants produce a single product, then a synthesis reaction has occured.
The type of reaction that always has an element and a compound as reactants is a single displacement reaction, or a substitution reaction. These are of the form A + BC ---> AC + B.
This is called a replacement reaction. When one element replaces another in a compound, it is called single replacement or single displacement. An example isZn + 2HCl ---> ZnCl2 + H2 where the zinc replaces the hydrogen in the acid to form zinc chloride.
A double replacement reaction.
In this reaction, calcium oxide and water combine to form a single product, calcium hydroxide. Such a reaction in which a single product is formed from two or more reactants is known as a combination reaction.