Types of Chemical Reaction – Chemistry is all about bonds and reactions. A chemical reaction is a process in which chemical changes take place between the reactants and form products. The motion of electrons , breaking of bonds, the formation of blonds leads to the product as well as by-product formation. If you are a chemist, you have to encounter various chemical reactions. In chemical industries, chemical reactions are being performed in reactors at a large scale to produce products. You can learn about reactor type in an article i.e. types of chemical reactors.
There are several types of chemical reaction but there are 6 primary types of reaction and they are combination, decomposition, single displacement, second displacement, precipitation. Let us understand these different types of chemical reactions along with examples.
You can see the “N” number of reactions, you use is prepare is a product and a result of chemical reaction, plastic, glass, bricks, paper, and many more. Hence chemical reactions are important to product substance that is useful for us. Prior to getting into the chemical reaction types, let us understand what is a chemical reaction and chemical reaction definition in brief.
What is chemical Reaction?
The chemical reaction is a process in which two or more elements allow to interact with each other to form a product. In a chemical reaction. The element use in the chemical reaction is known as reactants. During the chemical reaction, breaking and formation of chemical bond takes place and result in formation of the product.
A chemical reaction occurs at a definite rate known as the rate of reaction which depends on the factors like the concentration of reactants, pressure and temperature. During chemical reaction, original properties of reactant changes and hence the properties of product is different from the reactant.
This was the introduction to what is chemical reaction, now let us learn types of chemical reactions with examples and explaination.
Types of Chemical Reaction
There are numbers of a chemical reaction or we can say countless but for simplicity, we can categorize in primarily 6 types of chemical reaction. A reaction type can fall into multiple types as well. Let us move forward and see chemical reaction types
1. Combination Reaction
Combination type of chemical reaction is also know as synthesis reaction in which two component reacts with each other and result in new product.
A+B → C
This is the simplest form of reaction in which A and B are the reactant which are allowed to react with each other and they from C as a product.
Example 1 – Combination reaction
S + O2 → SO2
This is an example of combination reation in which S i.e sulfur is allow to react with oxygen and results in Sulphur dioxide
Example 2 – Combination chemical reaction
In above reaction, sodium is being react with chlorin and we get sodium chloride as a product.
2. Decomposition Reaction
A decomposition reaction is a type of reaction in which a compound gets break down into two or multiple simple substances/elements. It can also be defined as the reaction which split the component into more simpler form of substance but under certain condition. This can be considered as a reverse reaction of a combination reaction. There are various types of decomposition reactions such as Thermal decomposition reaction, Electrolytic decomposition reaction, photolytic decomposition etc.
In the above reaction, AB is a product which get break down into two component i.e. A and B under certain conditions.
Decomposition reaction example
CaCO3 → CaO + CO2
In this reaction, calcium carbonate is decomposed and form calcium carbonate and carbondioxide in gaseous form.
3. Displacement Reaction / Single Displacement Reaction
In the Displacement reaction, One more reactive element will replace another less reactive element in a compound. In this reaction, elements that form anion can only displace anions, and elements that forms cation can only displace cation.
AB + C → AC+B
In the above reaction, AB is the substance that is being reacted with the C substance. During this reaction, C is more reactive than B and hence B is replace with C and form AC product.
4. Double Displacement Reaction
In double displacement reaction, reactant from each compound form anion and cation and swap position of the anion with anion and cation with cation between two different compounds and form completely different product.
A+B–+C+D– → A+C–+B+D–
In the above reaction, AB and CD are the reactant which form anion and cation and switch position
BaCl2 + Na2SO4 → BaSO4 + 2NaCl
In the above chemical reaction, BaCl2 will from Ba+2 cations and Cl– as anion and in Na2SO4 in which, Na will lose electron and form cations i.e. Na+while SO2-4 will gain elector and form anion. These anion get swap with anion and from
5. Combustion Reaction
A combustion reaction is a type of reaction in which a substance usually a hydrocarbon, undergoes an oxidation reaction. It basically reacts with oxygen gas and releases energy in the form of heat or light and along with other substances. There are different types of combustion reactions. We had covered Stages of fire in detail.
CxHy+ O2 → + OCO + H2O Heat (energy)
A combustion reaction is widely used in our day-to-day life i.e for the preparation of food. LPG gas that we get in cylinders of pipe gas, when get sparks, it releases heat and this combustion is used to prepare food.
C(s) + O2(g) → CO2(g) + energy
6. Precipitation Reaction
In precipitation reaction, two aqueous solution containing salts are combines, insoluble salt is form. This insoluble salt is known as precipitate. These reactions are mostly double displacement reactions in which solid insoluble salt, also known as precipitate is formed.
AB + CD → AD(Insoluble) + BC
Example of precipitation reaction
AgNO3(aq) + K2Cr2O7(aq) → Ag2Cr2O7(s) + KNO3(aq)
In the above reaction, AgNO3(aq) and K2Cr2O7(aq) are in aqueous form when mixed with each other, Ag2Cr2O7 , as an insoluble salt is formed as a precipitate and KNO3 is in an aqueous state.
Chemcial Reaction Examples
|Combination Reaction||A+B → C|
|Decomposition Reaction||AB→ A+B|
|Single Displacement||AB + C → AC+B|
|Double Displacement||A+B–+C+D– → A+C–+B+D–|
|Combustion Reaction||CxHy+ O2 → + OCO + H2O Heat (energy)|
|Precipitation Reaction||AB + CD → AD(Insoluble) + BC|
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