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Because you need to know that it is absolutely pure if you are to rely absolutely on its M.P. Alloys have a wide range of MPs, depending on the exact composition. If you can be sure that your sample is pure lead then you have already identified it !

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15y ago

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How do melting points help scientists?

The melting point can help a scientist identify a substance.


Why can you use the melting point to help identify a material?

The melting point is a characteristic physical property of a substance, and it can be used to help identify a material because each pure substance has a specific melting point under standard atmospheric conditions. By comparing the measured melting point of an unknown sample to known melting points of potential materials, you can narrow down the possibilities and identify the substance. Additionally, impurities can cause variations in melting point, so a sharp melting point indicates higher purity, further aiding in identification.


How could you use the physical properties of melting and boiling point to identify a substance?

If you know the melting point and boiling point of a substance, you could look them up in a table to see what substances have those melting and boiling points. In practice, there are lots of other tests you'd probably want to do in addition, because in general there's no guarantee that an unknown substance is a single pure compound.


What is the significance of boiling point and melting point of a substance?

Melting points and boiling points are phyical constants which means specific compounds have specific melting/boiling points. Therefore you can identify a substance if you determine the mp/bp. Also you measure the purity of a mixture using melting point tests.


Is melting point a phyical or chemical?

Melting point is a physical property of a substance, as it refers to the temperature at which a solid becomes a liquid. This transformation does not alter the chemical composition of the substance; it remains the same material before and after melting. Therefore, melting point is used to characterize and identify substances based on their physical behavior.

Related Questions

What is important of melting point?

Knowing the melting point of a substance provides information to determine what the substance is if its unknown. If you are making a substance, checking the melting point will let you know if you have made what you set out to make, (because impurities can mess up the melting point)


How can the melting and boiling point help you identify it?

Melting and boiling points are physical properties unique to each substance, so knowing these values can help identify a substance. By comparing the observed melting and boiling points of an unknown substance to known values in a database, you can narrow down the possible identities of the substance. Substances with similar melting and boiling points are more likely to be the same compound.


How do melting points help scientists?

The melting point can help a scientist identify a substance.


What property is used to identify a pure substance?

melting point


A substance with a melting point of 50 degrees celsiusboiling point of 200 deg celsius?

The substance has a melting point of 50°C and a boiling point of 200°C. This information can help identify the substance by comparing it to known melting and boiling points of different substances. The melting point indicates the temperature at which the substance transitions from solid to liquid, while the boiling point is the temperature at which it transitions from liquid to gas.


What does the melting point graph reveal about the physical properties of the substance?

The melting point graph shows the temperature at which a substance changes from a solid to a liquid. It reveals the substance's melting point, which is a key physical property that can help identify and characterize the substance.


How does knowing the melting and boiling point of matter help you determine its state?

Knowing the melting and boiling points of a substance helps you determine its state because these points correspond to specific temperature ranges at which the substance transitions between different states of matter. The melting point indicates the temperature at which a solid turns into a liquid, while the boiling point is the temperature at which a liquid turns into a gas. By observing at which temperature these transitions occur, you can identify the state of the matter.


How does knowing the melting point of a substance help us with solidification?

i dont know :P


How does boiling point and melting point find a substance?

The boiling point is the temperature at which a substance changes from a liquid to a gas, while the melting point is the temperature at which a substance changes from a solid to a liquid. These properties are unique to each substance and can be used to identify or characterize them.


How do you identify the change of state a substance is undergoing?

through it's boiling, melting, and freezing point.


What are you physical properties that can help you identify a substance?

The traditional ones are melting point and boiling point.


Name the 3 physical properties that can help identify a substance?

texture,melting point and odor ;D