Monday, July 2, 2012

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Impure substances

Impure substance
The substance that is made up of combination of different kind of substance at any proportion.


Mixture
A mixture is defined as a mass formed by mixing up two or more substance in any proportion by weight so that each of which retains its own properties.


Types of  mixture


Homogenous mixture
A mixture in which the particles of the components of the mixture are uniformly distributed is called homogenous mixture. Eg:- sugar,salt 
If sugar and salt are completely dissolved sugar or salt in not seen through naked eyes .


Experiment
Take a transparent glass and dissolve sugar .You cant see the sugar      



Heterogenous mixture
A homogenous mixture is defined as mixture in which the particles of the components of the mixture are not equally distributed. Eg:- sand,mud 
If sand and mud are completely dissolved sand or mud can't be seen through naked eyes.

Experiment
Take a transparent glass and dissolve sand. You see the sand in the lower portion.

  

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