Chemical substance
A chemical substance is any material with a known chemical composition.[1] For example, water has the same properties and the same ratio of hydrogen to oxygen whether it came from a river or was made in a laboratory. Typical chemical substances found in the home include water, salt (sodium chloride) and bleach. Generally, substances exist as a solid, a liquid, or a gas, and may change between these phases of matter when there are changes in temperature or pressure.
Gallery change
-
Gray silicon powder, an element. All the other ones are chemical compounds.
-
White sodium chloride
-
Pink hydrated (with water) manganese (II) chloride
-
Brown manganese (II) carbonate
-
Black copper (II) oxide
-
Red hydrated (with water) cobalt (II) chloride
-
Orange potassium dichromate
-
Yellow sodium chromate
-
Green hydrated (with water) copper (II) chloride
-
Blue hydrated (with water) copper(II) sulfate
-
Purple anhydrous (without water) chromium (III) chloride
_chloride_tetrahydrate.jpg)
-carbonate-sample.jpg)
-chloride-hexahydrate-sample.jpg)
_chloride_dihydrate.jpg)
-chloride-purple-anhydrous.jpg)
References change
- ↑ Hill, J. W.; Petrucci, R. H.; McCreary, T. W.; Perry, S. S. General Chemistry, 4th ed., p5, Pearson Prentice Hall, Upper Saddle River, New Jersey, 2005.
