What is homogeneous and heterogeneous mixture?

 

Mixtures are of 2 types:

  1. Homogeneous Mixtures
  2. Heterogeneous Mixtures

 


What are Homogeneous Mixtures?

  • Homogeneous Mixtures are those in which different substances are completely mixed together.
  • This means they have uniform composition throughout.
  • It is difficult to distinguish different substances from each other
  • We are able to see different particles in a homogeneous mixture clearly



 

 

Example

If we mix salt in water and stir it with a spoon

it forms a homogeneous mixture

We are not able to see salt particles separately from mixture

 

What are Heterogeneous Mixtures?

  • It is a mixture which has physically distinct parts  

(different particles of mixture are easily visible)

  • Such mixtures have non uniform composition throughout the mixture
  • We are able to recognize individual particles by looking at a mixture

 

Example 1

Mixture of Oil and Water is a heterogeneous Mixture

We are able to see oil and water clearly separately in the mixture

 

Example 2

Mixture of Salt (Sodium Chloride) and Iron filings is a heterogeneous mixture

The particles of salt and Iron filings can be seen and distinguished easily

 

Difference between Homogeneous and heterogeneous mixtures

 

 

Homogeneous Mixture

Heterogeneous Mixture

Individual components of mixture cannot be seen and distinguished easily

Individual components of mixture can be seen and distinguished easily.

They may or may not have a variable composition

(Different Particles may be in same or different ratio throughout the mixture)

They have a variable composition

(Different Particles are in different ratio throughout the mixture)

Example

Mixture of Salt and Water

Example

Mixture of Salt and Iron Filings

 

Note - Heterogeneous and homogeneous mixture may be a Matter of Scale

It means that a mixture may look homogeneous from a distance

But if we look closely with help of  a microscope, it may appear to be heterogeneous mixture

(We may be able to identify individual component clearly)

 

Example - Sand in a desert may look homogeneous but if we examine it with help of  a microscope,we may be able to identify individual components

 

Type of Homogeneous Mixture 

  • Solution

 

Different Types of Heterogeneous Mixtures

They are of 2 types

  • Suspension
  • Colloid



Hetero_Homo_mixture.png

homoVShetero.png

  1. Class 9
  2. Chapter 2 Class 9 - Is Matter Around Us Pure

About the Author

Davneet Singh's photo - Teacher, Computer Engineer, Marketer
Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.