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Can density be used to identify a substance?

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βˆ™ 2010-04-13 19:39:51

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Yes, it is possible. To identify an object using its density you need only a few things: an accurate scale to find the mass of the object; a graduated cylinder large enough to accommodate whatever object you have; the object itself; and a liquid. Any liquid can be used for this, however, if the object floats then the calculation becomes slightly more complicated. I use water. First weigh the object, then immerse it in the liquid. Note how much water is displaced. Divide the mass of the object by the volume of the liquid and you'll find the density. Then compare that density to the list of known densities to identify the object. Pretty simple! physical and chemical properties can be uesed to identify substance.

I used:

http://www.ehow.com/how-does_5187289_density-used-identify-substances.html

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Not sure you can actually identify the substance from its density alone: you would have to know its state too. For example, water in gaseous form would be an entirely different density to water in solid form wouldn't it? So no, you cannot identify a substance from its density, without other information.

The best way to identify a substance is often through spectroscopy, in which the radiation either absorbed or given off from a chemical can determine which substances are present. This is what happens for the sun.

2010-04-13 19:39:51
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Related Questions

Why do scientist measure mass and volume?

So they can determine the density of a substance. Density = mass/volume. Density can be used to identify a substance.


How can density be used to identify a substance?

Density is defined as the ratio of an object's mass to its volume.


Why is it important thatwe control the density for any substance?

The density of any substance is constant, we don't control it. However, by finding the density of any substance, it can be used to help identify the substance.


How can you use mass and volume to determine the identity for a substance?

You can divide the mass by the volume and find the density. Density can be used to identify a substance.


Is a single property such as density sufficient to always correctly identify a substance?

can density always correctly identify a substance


What is density and how is it calculated?

Density is a very important property which can be used to identify a substance. We can calculate Density by dividing mass by volume.Density is the measure of how compact something is. To calculate density, take the mass of the substance, and divide it by the volume of the substance.


Is density a property of matter that can identify a substance?

In most cases, it can be used to cut down the possibilities, and to identify the components of some mixtures, but it cannot be used empirically and alone to determine what a substance is.


Why is density a characteristic property?

Density is a Characteristic Property because it is A quality of a substance that never changes and can be used to identify the substances.


What quality of a substance that never changes and can be used to identify it?

A quality of a substance that never changes is one of the reasons why density is a characteristic property


Is density a good way to identify a substance?

yes


How can density be used to identify an unknown substance?

pretty sure this is right but, you can because once you have the density you can use a chart with substances on it then you can match the with the unknown substance. at least that's what we do in my class...i think?


Explain how density can be used to identify a substance?

By comparing the measured density to a table of known densities for different substances. Of course, since several substances may have similar densities, it is best to use additional criteria to identify a substance - such as its color for example.


What are common physical properties used to identify pure substance?

There are many varying physical properties used to identify a pure substance. Some of the most prevalent physical properties are color, odor, density, melting and freezing points and solubility.


How can density be used in the identification of a pure substance?

Density can be used to identify a pure substance because it doesn't depend on the size of the sample because as the sample's mass increases, its volume also increases proportionately (the ratio of mass to volume is constant).


How are properties used to identify substance?

Examples: chemical composition, density, colour, odor, structure, refractive index, etc.


What is three physical properties that helps identify a substance?

density. :) ♥


What can be used to identify a substance or predict how it will behave?

Physical and chemical properties can be used to identify a substance or predict how it will behave.


How can density be used to identify unknown compounds or elements?

Everything has a specific density, so if you know the density of something, you can identify it.


What physical property does NOT identify a substance?

There are many physical properties that do NOT identify a substance. For example, state, density, boiling point, melting point, and mass are all physical properties that do NOT identify a substance.


How can density be used to identify a material?

Density can be used to identify a material by how much you get as an 'answer'. because if it is the same material then probably the density value will be similar. -By Anna 6-4


What are characteristics that identify a sample of matter as a substance?

Characteristics that identify a sample of matter as a substance are simply whether it is matter or not. However, which substance the matter is can be identified through its density, melting point, conductivity, etc...


Is mass a characteristic property of a substance?

No definitely not.Because a characteristic property should not change.It is used to identify a substance.Mass and Volume are not characteristic properties whereas Density is a characteristic property of the substance .


Can density identify substance?

It helps but you usually can't id based on that alone, many different substances have the same density.


Can solubility be used to identify an unknown substance?

A simple solubility test can be used to identify an unknown substance. Most substance will make a precipitate when around certain molecules.


What 5 physical properties can be used to identify a substance?

odor, texture, melting point, boiling point, solubility, polarity, specific heat, and density