Chemical substances

Chemical substances

We are searching data for your request:

Forums and discussions:
Manuals and reference books:
Data from registers:
Wait the end of the search in all databases.
Upon completion, a link will appear to access the found materials.

As you see, the concept of chemical substance - or simply substance, as we will call it from now on - is closely related to the study of chemistry.

Chemists consider that A substance is a portion of matter that has well-defined properties that are characteristic of it.. Just as you can recognize a friend for a set of characteristics (skin color, voice tone, nose shape, walk, speech, hair color and texture, size, etc.), chemists identify substances by their full properties.

Among these properties are the fusion point, O boiling point, a density, the fact that flammable or not, a color, O odor etc.

Two different substances may eventually have one or two equal properties, but never all of them. If it happens that all properties of two substances are equal, then they are actually the same substance.

A sample of water, whatever its origin (rain, river, sea, lake, glacier, laboratory produced etc.), always has the same properties.

So any colorless liquid with MP = 0 ° C, PE = 100 ° C and d = 1.0 g / cm3It is classified as water. And so on.

When a substance is produced in the laboratory or extracted from some natural source, and is suspected to be a new substance, chemists first determine its properties.

If they totally coincide with those of a known substance, then it will not be a new substance. If, on the other hand, there is no known substance with these properties, then a new substance has indeed been discovered.


  1. Calan

    Yeah thanks

  2. Farly

    I, as a person not young, very rarely used blogs, considering them useless, but now I completely changed my mind by visiting this wonderful blog. Firstly, I liked the accessible interface and convenient navigation, and secondly, a huge amount of useful information that will be useful to me in my profession for sure. Now I will visit blogs much more often, and I will add this one to bookmarks for convenience. There were also a sufficient number of reviews, which testifies to the excellent administration. Thank you very much for opening my eyes. I will be your regular satisfied visitor.

  3. Percival

    You are mistaken. I can prove it.Write to me in PM, we will discuss.

  4. Makora

    You are wrong. I can prove it.

  5. Durward

    I apologise, but, in my opinion, you are not right. I am assured.

  6. Shelden

    I think this - the wrong way.

Write a message