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1. Check the melting point or boiling point of the substance. E.g. it is known that the boiling point of water is 100 degree celcius. It a sample of water boils are 101 degree celcius, the sample is impure.
2. Check if melting or boiling occur over a range of temperatures. E.g. if water boils from 101 to 103 degree celcius, then it is impure because pure water boil exactly at 100 degree celcius.
3. Perform paper chromatography. If the sample has only one spot on the chomatogram then it is pure substance.
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Is a lemon a pure substance?
it is a pure substance.... not
Is Methane a mixture or a pure substance?
Methane is a pure substance.
Is helium gas a pure substance or mixture?
Helium is pure as it is on the periodic table.
Is silicone a pure substance or a mixture?
Silicon is an element. Its symbol is Si.
Is CH3COOH a mixture or pure substance?
Pure substance
How do you identify pure substance?
by checking in the periodic table
How can knowing the physical properties of a substance be useful?
The physical properties of a pure substance can be used to identify it. A pure substance is an element or a compound, not a mixture.
What property is used to identify a pure substance?
melting point
Which term are use to identify pure substances?
Pure substance can be identified as either elements or compounds. Some examples of pure substance that are elements are sulfur and tin. Pure substances that are compounds are sugar and salt.
What is another name for a pure substance?
The terms element and compound are used to identify pure substances.
Is acetone a pure substance or mixture?
pure substance, propanone
Is a lemon a pure substance?
it is a pure substance.... not
Is a tin a pure substance?
Pure substance
A pure substance is the what throughout?
A pure substance is the same throughout. When a substance is 100% something it is pure.
Is Methane a mixture or a pure substance?
Methane is a pure substance.
Is helium gas a pure substance or mixture?
Helium is pure as it is on the periodic table.
How can the melting and boiling point help you identify it?
Each pure substance has its own unique melting and boiling point.
