How can chemical and physical properties help identify substances?

Answer 1

Certain combinations of physical properties are unique, so if you have a substance that needs identifying, you can measure its properties and use the results to figure out what you have been measuring.

For example, if you have a transparent liquid with a density of 1 g/ml, a refractive index of 1.3330, chances are you're looking at water.

Answer 2

melting point

boiling point

density

These are three physical properties that help a scientist to identify and classify matter. These temperatures are always the same for a unique substance.

Answer 3

You often use the properties of a substance to identify it. For example, when you reach into your pocket, you can tell the difference between a ticket stub and a folded piece of tissue because one is stiff and smooth and the other is soft.

Answer 4

As long as it is a pure substance (i.e. you can write a chemical formula for it), you can compare to the physical properties (e.g. melting point, boiling point, conductivity) in the SI data book. You can back this up with known chemical reactions for the substance.

Answer 5

Physical properties are specific for each material and can help the identification.

Answer 6

by observing or measuring without changing the substance

Answer 7

color, crystalline structure, melting point, boiling point, hardness, magnetic properties, X-ray diffraction data, etc.