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Why do properties of a pure substance do not vary from sample to sample?
Wiki User
∙ 6y ago
The properties of a pure substance do not vary from sample to sample because there is no reason for them to. Why would they? Water is water, and if you take any sample of water from any stream, lake or ocean and remove all the "stuff" in it to leave only the water, all the samples will behave the same way physically and chemically. The chemical properties of a substance (and the physical ones, too) are set by what the substance is. And these properties define the way the substance behaves in the universe as a whole. There is no reason for any water found on, say Mars, to behave any differently than any water here on Earth - or anywhere else in the universe.
Josefa Bergnaum
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The difference between a pure substance and a homogeneous misture?
Pure substance: matter w/properties/composition that don't vary from sample to sample. (salt, water,etc). Homogeneous mixture: composition can vary; an example is a solution (coffee w/sugar) and is uniform throughout.
Why are all samples of a given substance have the same intensive properties?
The properties of a pure substance do not vary from sample to sample because there is no reason for them to. Why would they? Water is water, and if you take any sample of water from any stream, lake or ocean and remove all the "stuff" in it to leave only the water, all the samples will behave the same way physically and chemically. The chemical properties of a substance (and the physical ones, too) are set by what the substance is. And these properties define the way the substance behaves in the universe as a whole. There is no reason for any water found on, say Mars, to behave any differently than any water here on Earth - or anywhere else in the universe.
What is a pure substance classified as?
A pure substance is classified by having a definite and constant composition. The substance can be either an element or a compound, but what makes the substance pure, is that it does not vary.
What are two physical properties that can vary even when the substance with these properties does not change?
i think Buoyancy and Density are two physical properties that can vary even when the substance with these properties doesn't change.
What are two physical properties that can that can vary when the substance with these physical properties that dose not change?
Temperature and amount of the substance do not change chemical properties.
How is water a pure substance?
Pure substances fall into two categories: elements or compounds, both of which have constant compositions. H2O is a compound, and therefore a pure substance because its composition does not vary.
How do the properties of the states of matter vary?
Density does not vary with the state of the matter in a substance.
Is PCl3 a pure substance?
Yes, PCl3, or phosphorus trichloride, is considered a pure substance. This substance is considered pure because its composition does not vary.
Is The density of a substance is the same for all samples of the substance?
Not necessarily. The temperature of the samples would have to be the same. It can also vary with how pure the substance is.
What is the differences between a mixture and a pure substance?
1. A mixture contain two or more substances. 2. A mixture can be separated in components by physical procedures.
What are two physical properties that can vary even when the substance with these properties dose not change?
The density and state of matter (solid, liquid, or gas) of a substance can change with changes in external conditions even in the absence of any change in the substance itself.
Why density is the criteria for purity with respect to chemistry?
Mass and volume are extensive properties, which are dependent upon the size of the sample. A larger sample will have a greater mass and volume than a smaller sample. Density is an intensive property, which does not depend on the size of the sample. Density is a ratio of mass to volume, which does not vary with the size of the sample. The density of a larger sample will be the same as the density of a smaller sample.
