Types of chemical Reactions

Types of chemical reactions

Types of Chemical reactions,You will get a comprehensive look of the types of "Types of Chemical reactions".You will see and know how the chemical reacts and how they form different Types of substances.you will get a analysed look of all this Types of Chemical reactions.

1.Combination Reactions:

The name suggests us that there is some thing which is combining and hence its chemistry so some types of chemical reactions is happening which combine and make a product.

A type of chemical reaction in which two or more Reactants combine to form a product.This sentence will become quite easy if you see below:

A + B = AB OR A + B + C = ABC

Example is more important, see them:

2Mg + O2 →2MgO {Both the magnesium and oxygen combine to form one type of product.}

C + O2 →Co2

CaO + H2O → Ca(OH)2

(Calcium Oxide) (Water) (Calcium Hydroxide)
When Calcium Hydroxide is left in air it reacts with the Carbon Dioxide to form Calcium carbonate whose color is white.
Hence, It is also used for White washing the wall.

It’s Chemical Reaction is as follows:-
Ca(OH)2 + CO2 → CaCO3 + H2O.{Remember,this is not the combination reaction.}

2.Decomposition Reactions:

This name is looking quite opposite of the combination reactions.The name telling us something is being broken into two or more parts.

The types of chemical reactions in which one reactant break down to form two or more products.This sentence will become quite easy if you see below: AB=A+B ; ABC =A+B+C

#This is an endothermic reactions.

Endothermic Reactions : A type of chemical reactions in which the energy in the form of heat,light and electricity is required.

*On the basis of which type energy is required to decompose one reactant into two or more products.These chemical reactions have three types of Decomposition Reactions:-

Thermal Decomposition Reactions.
Electrolytic Decomposition Reactions.
Photo Decomposition Reactions.

Thermal Decomposition Reactions:

Those decomposition reactions which requires the heat to break down one reactant into two or more products.

Example is more important, see them:

∆

ferroussulphate (FeSO_4.7H20) ⟶ anhydrous ferrous sulphate (FeSO₄) + Water(H2O)↑.

∆=Heat Energy.

On further heating, this anhydrous ferrous sulphate (FeSO₄) will break into Ferric oxide and sulphur dioxide as well sulphur trioxide.

ferrous sulphate (FeSO₄)→Ferric Oxide(Fe2O3)+ sulphur dioxide(SO2)+ sulphur trioxide(SO3).

Electrolytic Decomposition Reactions:

Those type of Decomposition Reactions in which electricity is required in order to break One reactant into two or more products.

Example is more important, see them:

Lets take the thing that make your life living and you called as living beings.

Our Water.

Q.What is the Chemical name of water?

Answer-Oxidane is the chemical name of the water.

Now come to the point.

When water molecules is decomposed through electricity.

2H2O(Water) → 2H2(Hydrogen) + O2(Oxygen).

Now let we do it.

Activity:To show the decomposition of water.

Materials:

Distilled water

Tap water

2 silver-colored thumb tacks

9V battery

Small, clear plastic container (a plastic to-go sauce container from a restaurant would work great)

2 test tubes

Stopwatch

Baking soda

Table salt

Lemon

Dishwashing detergent

Procedure:

Insert the thumb tacks into the bottom of the plastic container so that the points push up into the container. Space them so that they’re the same distance apart as the two terminals of the 9V battery. Be careful not to prick yourself!

Place the plastic container with the thumb tacks over the terminals of the battery. If the cup is too large to balance on the battery, find something to stack it on: between two books, a stack of post-its, etc.

Slowly fill the container with distilled water. If the tacks move, go ahead and use this opportunity to fix them before you proceed. Will distilled water conduct electricity on its own? Try it!

Add a pinch of baking soda.

Hold two test tubes above each push pin to collect the gas being formed. Record your observations. What happens? Does one tube have more gas than the other? What gases do you think are forming?

Discard the solution, and repeat the procedure with a different combination:

Distilled water and lemon juice

Distilled water and table salt

Distilled water and dish detergent

Distilled water (no additive)

Tap water (Does tap water work? If so, why?)

Results:

Distilled water will not conduct current, while tap water will conduct a small current. The solution with baking soda will facilitate a good amount of electrolysis. The solution with table salt will facilitate electrolysis the best.

Photo Decomposition Reactions:

The name suggests as that the chemical reactions take place under light as photo means light.

Those types of chemical reactions where the reactants decomposes through the light.

When Silver chloride is left in sunlight it decomposes into Silver and chlorine.

See it:-

2AgCl → 2Ag + Cl2

When Silver bromide is left in sunlight it decomposes into Silver and bromine.
See it:-
2AgBr → 2Ag + Br2

3.Displacement Reactions:

Those types of chemical reactions where one group of atoms displaces the other group of atoms is known as Displacement Reactions.

Now a questions Arises which one group of atoms of a element displaces the other.Don't worry See below:-

It is the reactivity series of different elements firstly you have to learn this:-

Reactivity series-Types of chemical reactions

The element on the top of this series is highly reactive (say;Potassium) and which one is at the are less reactive (say;Plantium).Those elements which are more reactive displaces the less reactive elements.

AB + C → CB + A.(Here C is more reactive than A.)

So let's go with some of the examples:-

The reaction between silver nitrate, AgNO₃ (which contains an Ag⁺ ion), and zinc, Zn, forms silver, Ag, and zinc nitrate, Zn(NO₃)₂ (which contains a Zn²⁺ ion):

2AgNO
3
(aq) + Zn
(s) → 2Ag
(s) + Zn(NO
3)
2
(aq)(Here Zinc is more reactive than Silver.)

The reaction between magnesium, Mg, and hydrochloric acid, HCl, forms magnesium chloride, MgCl₂, and hydrogen, H_2:

Mg(s) + 2 HCl(aq) → H2(g) + MgCl2(aq)(Here Magnesium is more reactive than Hydrogen.)

Some more examples:-

Some more Examples-Types of chemical Reactions

4.Double Displacement Reactions:

What is meant by double displacement reaction?

Those types of chemical reactions in which the anions and cations displaces their positions.

AB + CD → CB + AD.(Here C and D are Anions and Cations.)

What are the types of double displacement reactions?

There are two types of double displacement reaction:

Precipitation Reactions
Neutralization Reactions

Precipitation reactions:A precipitation reaction is a type of chemical reaction in which two soluble salts in aqueous solution combine and one of the products is an insoluble salt called a precipitate.

Now here let's go with the examples:

The chemical reaction between potassium chloride (KCl) and silver nitrate (AgNO3), and solid silver chloride (AgCl) is the precipitate or the insoluble salt formed as a product of the reaction is one of the examples of a precipitation reaction. The equation of the reaction:

AgNO3(aqueous) + KCl(aqueous) —–AgCl(precipitate) + KNO3(aqueous)

Some other Examples:

2KOH(aqueous) + CaCl2(aqueous)—-Ca(OH)2(aqueous) + 2KCl(aqueous)

AgNO3(aqueous) + NaCl(aqueous) —- AgCl↓ + NaNO3 (aqueous)

Mg(OH)2(s) + 2HCl (aqueous) ——— MgCl2(aqueous) + 2H2O(l)

Neutralization Reactions:A neutralization reaction is when an acid and a base react to form water and a salt.

Q.Why this type of chemical reactions is known as neutralization Reactions?

It is called so because here acid is being neutralized by base.

Now here let's go with the examples:

When Sodium hydroxide is added to hydrochloric acid. Sodium chloride and water are formed:

$N a O H + H C l ⟶ N a C l + H_{2} O$

Milk of magnesia, which is a base, is given as antacid in the case of indigestion, to neutralize the more acid produced in the stomach:

Mg(OH)2+2HCl⟶MgCl2+2H2O

4.Red-ox(Reduction-oxidation) Reactions:

Those types of chemical reactions where Oxidation as well reduction process is going on simultaneously then the reaction is said to be Redox reaction.

Q.What is the meaning of oxidation in the terms of oxygen?

Gaining of oxygen is known as "Oxidation".

Q.What is the meaning of oxidation in the terms of hydrogen?

losing of hydrogen is known as "Oxidation".

Q.What is the meaning of reduction in the terms of oxygen?

losing of oxygen is known as "Reduction".

Q.What is the meaning of reduction in the terms of hydrogen?

Gaining of hydrogen is known as "Reduction".

Now here let's go with the examples:

Examples of redox-types of Chemical Reactions

Examples of Redox Reactions-types of Chemical Reactions

These are the five types of Chemical reactions ,I hope you understand the types of chemical reactions if further you have any concern or problems then comment us below. We are active for 24 X 7.Please share and subscribe us.

Types of chemical Reactions|Ncert Class 10.