0
How could the identify of a compound be established by melting point?
Wiki User
∙ 11y ago
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.
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
How could you positively identify a compound using only melting point determinations?
I do not believe that any chemist would choose to identify a compound by using only the melting point; why create such difficulties for yourself?
Which property could be used to identify a compound in the laboratory?
Depending on the method many chemical or physical properties can be used. Examples: spectra of emission, color of ions in solution, formation of some precipitates, melting point, density, etc.
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.
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.
Why should you should never use taste or touch to identify bases?
A compound could be caustic and burn your mouth and tongue.
Can you give me a sentence with the word compound in it?
Bus-stop is a compound noun. Water is a compound made of oxygen and hydrogen
What might have happened if you are measuring the melting point and the compound disappears?
It could have sublimed... and turned directly from a solid into a gas instead of melting first. Compounds such as iodine, carbon dioxide and others do this readily.See the Related Questions to the left for more information about sublimation.
What tests could be used to verify the composition of alum?
Find the melting point of the compound and compare it to the published value for alum. You could also analyze by water of hydration by burning the compound until all of the water of hydration is burned off. Then find the mass of the dry crystals and compare it to the correct value.
How could knowing the melting point of a substance be helpful for a scientist?
- the melting point is specific; we can identify compounds or elements knowing the melting point - the melting point is extremely important in technology, we need to know the behavior of materials under heating
Which organic compound has melting point of 122.3-123.0?
hey my lil nova net dude...i have no idea what the answer is but you can cook some brownies for me and we will be friends.
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 do you prove crystals are pure after re crystallisation?
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.
