Mixtures & Pure Substances

• A pure substance is made of only one kind of material.


• Since distilled water has always the same characteristics throughout and doesn't separate into other substances by simple means, then it is made of one kind of material and hence it is a pure substance.

the source: fotosearch http://www.fotosearch.com/DNV194/010824_0947_0068/Distilled water is almost the only example of pure substances.

• A mixture is made of two or more than one kind of material.
the source: eating in http://www.eating-in.com/10-must-follow-tips-for-us-salad-eatersSalad is one of the examples on the mixture.

• The boiling point of pure substance is constant.



• The boiling point of a mixture is variable.

Question: Can any substance of the material be separated into two or more substances by simple means?