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There are many different techniques of chemical analysis, and the first step is to just look at the substance and see if you can observe anything non-homogeneous in its appearance. If the substance is a solid you could add water and see if all of it dissolves or just part of it. Chromatography is a useful technique; if you put a liquid on a paper or paper-like material, different substances diffuse at different speeds. Spectrography can be used to identify the constituent elements, which is at least a major clue as to what you are dealing with in terms of possible compounds. Distillation could be used to see if there is a component that has a lower boiling point than other components. A centrifuge can be used to separate out a denser component. And so forth.
A pure substance is a material that consists of only one type of atom or molecule. To determine if something is a pure substance, you can perform a purity test such as chromatography or spectroscopy to check for the presence of impurities. Additionally, characteristics like a sharp melting point or constant boiling point can indicate the purity of a substance.
Compare its physical properties to standards. If that is not enough, the use of various equipment can be used to determine what is present and in what amounts; further tests can be used to determine what the exact mix is, and how exactly everything is bonded.
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How can you tell if a substance is pure or not?
You can tell if a substance is pure by using techniques like melting point determination or chromatography to compare against known pure samples. If the substance has a consistent melting point or chromatogram, it is likely pure. Impurities can cause a substance to have a lower melting point or show additional peaks in chromatography.
A pure substance is the what throughout?
A pure substance is constant in composition throughout, meaning it is made up of only one type of particle or element. This distinguishes it from a mixture, which contains two or more different substances that are physically combined.
What does a chemical formula tell you about a pure substance?
A chemical formula tells you the types of atoms present in a pure substance and their ratios. It provides information on the elements that make up the substance and how they are bonded together.
Can something be both a pure substance and a mixture?
No, something cannot be both a pure substance and a mixture. A pure substance is made up of only one type of atom or molecule, while a mixture is made up of two or more different substances physically combined.
Is iron a mixture or a pure substance?
Iron is an element, so it is a pure substance.
What are two reasons why density is a useful property identifying substances?
Density can tell you how "pure" a substance is. Since each substance has a specific density in its "pure" state, having no other substances in its composition, by measuring it density you can tell how pure the mineral or substance is, 99.9% pure gold.
How can you tell if a substance is pure or not?
You can tell if a substance is pure by using techniques like melting point determination or chromatography to compare against known pure samples. If the substance has a consistent melting point or chromatogram, it is likely pure. Impurities can cause a substance to have a lower melting point or show additional peaks in chromatography.
What are two reasons why density is a useful property for identifying substances?
Density is specific for each substance. Also the measurement is generally simple.
What is the characteristic of a pure substance that can be observed without changing the substance into something else.?
A physical property can be observed without changing the substance into something else.
What is a property of a characteristic of a pure substance that can be observed without changing the substance into something else?
A physical property can be observed without changing the substance into something else.
An what property is characteristic of pure substance that can observed without changing the substance into something else?
A physical property can be observed without changing the substance into something else.
What is a property of characteristic of a pure substance that can be observed without changing the substance into something else?
A physical property can be observed without changing the substance into something else.
A pure substance is the what throughout?
A pure substance is constant in composition throughout, meaning it is made up of only one type of particle or element. This distinguishes it from a mixture, which contains two or more different substances that are physically combined.
What is a pure substance that cannot be decomposed or converted into something simpler?
An element
What does a chemical formula tell you about a pure substance?
A chemical formula tells you the types of atoms present in a pure substance and their ratios. It provides information on the elements that make up the substance and how they are bonded together.
How could you prove to someone that a clear material is a solution not compound?
well Tell the person its a pure substance so a pure substance can only compound one matter
Is acetone a pure substance or mixture?
pure substance, propanone
