answersLogoWhite

0


Best Answer

the melting point of pure substances is always being sharp. it means that the boiling point it have it will boil at that point not some up or down but on same temperature in other words we say that it has no impurities because of impurities it boiling point varies and it has many other components and boiling point of every component is different so that why the boiling point of impure compounds varies or it don t have exact value and the pure compounds have same elements combine together and every molecule boil at particular point so it has sharp melting point or exact point

User Avatar

Wiki User

11y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: Why a sharp melting point could not be obtained always?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Related questions

What happens if boiling point is higher than melting point?

The boiling point is always higher than the melting point.


What information can be obtained from the melting point of a compound as an industrial chemist?

purity of a compound


What happens to neon during melting point?

There are a number of things that could happen to neon while it is at its melting point. It could melt.


How would you determine the purity of the solid crystals in crystallization?

One of the easier and more reliable ways to check if a solid compound is pure after re-crystallization is to check its melting point. Impurities will always lower the melting point of a sample, and the more impure, the lower the melting point will be. By checking the melting point of your sample with a reference value from a book or reliable internet source, it can be determined exactly how impure the sample is. If perhaps your compound is unknown, and thus are unable to obtain a reference value, you could obtain melting point of the sample, and then re-crystallize a few more times, obtaining a new melting point each time, until it is unchanged by re-crystallizing. This will of course decrease your yield, but if there is little fluctuation in your series of melting points, you can be sure you have a relatively pure sample.


What is the Melting point of cork?

Cork hasn't a melting point.


What information can be obtained by knowing the electronegativity differences between two elements?

How strong the bond will be , boiling point , melting point etc.


How could the identify of a compound be established by melting point?

Pure substances have very specific melting (and boiling) points. Assuming the substance is pure you could measure the melting point and compare it to a known database of melting points.


Does matter change from solid to liquid at freezing point or at melting point?

Matter changes from solid to liquid at its melting point, because this change is called melting. Freezing point is about the same as melting point, but it can be slightly lower, so melting point should always be used.


What was the first object to have a melting point?

objects just dont come up with melting points. to the smallest piece of iron to the largest the melting point is always going to be the same no matter what


What do you call the temperature at which a solid changes to a liquid?

This is the melting point.


Is a sharp melting point for a crystalline organic substance always indicates a pure single compound?

Nope; not always. So the answer would be false. You have to realize that there might be impure substances mixed. Likewise impure substance can either lower the melting point or increase it :)M. Bilal :)


The freezing point and boiling point for matter is a constant Explain this meaning of constant?

It means that the freezing or melting points do not change, that they are always the same, depending on the type of matter. For eg. the melting point or freezing point of water is 0○ Celsius and the boiling point is always 100○C.