Online CBSE & NCERT Class 9 Science Is Matter Around us Pure Notes

Online CBSE & NCERT Class 9 Science Is Matter Around us Pure Notes

Chapter 2 Is Matter Around Us Pure

This article brings you the CBSE Class 9 Science notes on ‘Mixture and Types of Mixture’. These notes are prepared by experts and cover every important topic from the chapter. It has been framed keeping students’ perspective in mind. This will help the students with an easy and simple understanding of the concept.

Two types of the Matter viz, Pure and Impure. A Pure Substance consists of a single type of particle, atoms, or molecules. An Impure Substance consists more than one type of particles, atoms or molecules. It is also known as a Mixture.

As per Class 9 Science syllabus, in this article, we will discuss mixture and types of mixtures.

Mixture

We will now discuss Mixture and its types. This article helps you in class 9 science notes on Mixture.

Mixtures are made up of more than one kind of pure form of matter known as a substance. The substance cannot be usually separated into other kinds of matter. Depending upon the nature of the components that form a mixture, we can have different types of mixtures.

Solution

A solution is a homogeneous mixture of two or more substances. As a solution, there is homogeneity at the particle level, it means that the particles are evenly distributed. A solution is made up of two components solvent and solute.

A Solvent is a component that dissolves the other component. The solvent is a usually larger portion in a solution.

The Solute is usually dissolved in the solvent. The Solute is usually present in smaller quantity.

Example- Lemonade, Air around us, Soda water.

Properties of a solution

• A solution is a homogeneous mixture.
• Particles are very small in size as they cannot be seen through the naked
• A beam of light cannot scatter through these particles.
• Solute particles cannot be separated through a filtration process.
• Solute Particles do not settle down as the solution is left undisturbed.

Solutions can be further classified into two categories depending upon the amount of a solute present in it

• Saturated Solution: -In a solution, if the solute cannot be further dissolved, then it is called saturated solution.
• Dilute Solution: -In a solution, if the amount of solute is less than the saturated level it is called diluted solution.

Concentration of a solution=Amount of Solute/Amount of Solution

1. Mass by mass percentage of a solution = (Mass of Solute/Mass of the solution) * 100
2. Mass by Mass percentage of solution = (Mass of Solute/volume of the solution) * 100

Suspension

A Suspension is a heterogeneous mixture in which solute particles are not dissolved but they are suspended throughout the mixture.

Properties of a Suspension

• It is a heterogeneous mixture.
• The particles are easily visible by naked eyes.
• A beam of light can easily pass thru the mixture.
• Solute particles settle down at the bottom if left undisturbed.

Students can try online school classes for understanding this chapter

Colloidal Solution

A Colloidal Solution is a heterogeneous solution; the particles of colloidal are uniformly spread throughout the solution.

Example- Fog, Rubber, jelly, etc.

Properties of a Colloid

• It is a heterogeneous solution.
• Particles are very small in size.
• They can easily scatter the light through them.
• They do not settle down when left undisturbed.

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