Some Introduction on types of mixtures for class 9
Answers
cMixture
Solutions
Suspension
Classification of Matter
First of all, you already know, you can classify matter into two types:
Pure substances: These are again classified into elements and compounds.
Impure substances: All mixtures are considered to be impure substances.
What is a Mixture?
The majority of substances that we see in our surrounding neighborhood are actually not pure substances. They are all mixtures! Mixtures are the substances composed of two or more forms of matter. You can separate them by physical methods. Examples include a solution of salt and water, mixture of sugar and water, different gases, air, etc. In any mixture, the various components do not combine through any kind of chemical changes. Therefore, the components do not lose their individual properties.
Types of Mixtures
Based on their composition, they can be divided into two types:
Homogeneous
Heterogeneous
Homogeneous Mixture
Mixtures having a uniform composition throughout their body are called Homogeneous Mixtures. For example – a mixture of salt and water, a mixture of sugar and water, air, lemonade, soda water, etc. Here, a mixture of salt in water is a classic example. This is because here, the boundary, between salt and water can never be differentiated. When a ray of light is passed through the mixture of salt and water, the path of light is not seen.
Properties
All solutions are the examples of a homogeneous mixture.
The particles in such a case are less the one nanometer.
They do not show Tyndall effect.
You cannot differentiate the boundaries of particles.
You cannot separate the constituent particles here using centrifugation or decantation.
Alloys are the examples of a solution.
Heterogeneous Mixture
Mixtures lacking a uniform composition throughout are called Heterogeneous Mixture. Therefore, a mixture of soil and sand, sulfur and iron filings, oil and water etc. are heterogeneous as they do not have a uniform composition. You can identify the various boundaries of the constituent particles of a homogeneous mixture. This is because in such a case it has two or more distinct phases.
Properties
Most of the mixtures are heterogeneous except solutions and alloys.
The constituent particles are present uniformly here.
You can identify the components easily.
Generally, two or more phases are present in a heterogeneous mixture.
The size of the particles here is between one nanometer and one micrometer.
They show Tyndall effect.