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How can a mixed melting point confirm the identity of an unknown compound?
Wiki User
∙ 8y ago
The melting point is not enough to definitely identify the compound because different compounds may have a similar melting point range. It all depends on the compounds. If you have a compound of acetanilide and flourene, the results will lead to similar melting points of 115 degrees Celsius and 116 degrees of Celsius. The ranges will be similar so it would be hard to definitely identify the compound.
Wiki User
∙ 13y ago
Wiki User
∙ 8y agoWhen adding a known compound to the unknown the melting point remain unchanged it must be conluded that these both compounds are identical.
Wiki User
∙ 6y agoThe melting point cannot be used to definitively identify a compound but can be used in support of such identification.
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You are given the melting points of three unknown substances and are asked to predict which one is an ionic compound You would select the compound with the?
Highest melting point. (Note that this does not assure that the remaining compounds are not also ionic.)
What is mendelevium's melting point and boiling point?
The melting point of mendelevium is 827 °C (1521 °F).
An unknown compound gave a melting point of 230 Cwhen the liquid solidifiedthe melting point was redetermined and found to be 131Cwhat might have caused this change?
Pressure can affect melting points.However, assuming that your conditions are the same, you may have changed the crystal structure of your compound.The crystal structure of a compound can affect its melting point. For example, diamond and graphite are both forms of elemental carbon. Diamond is a face-centered cubic structure. Graphite, however, is hexagonal. Graphite has a melting point of 3652°C, whereas diamond melts at 3550°C. When you liquified your compound, it because amorphous and lost its crystal structure. It may have recrystallized into a different structure.Heating may also have effected a chemical change. If you saw bubbles or a color change, you likely made a new compound.
A 22.0 gram sample of an unknown gas occupies 11.2 liters at STP What is the identity of the gas?
CO2
What element forms a compound having the formula KXO4?
if X simply represents and unknown, then the compound would be potassium permanganate, KMnO4
You are given the melting points of three unknown substances and are asked to predict which one is an ionic compound You would select the compound with the?
Highest melting point. (Note that this does not assure that the remaining compounds are not also ionic.)
When was Identity Unknown created?
Identity Unknown was created in 1945.
How can melting point and boiling point determination be used in identifying and or characterizing unknown compounds?
compounds are identified because each compound have characteristically different melting and boiling points.
What is the duration of Identity Unknown?
The duration of True Identity is 1.55 hours.
What is the identity of the unknown cation?
What is a unknown cation
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 are the ratings and certificates for Identity Unknown - 1960?
Identity Unknown - 1960 is rated/received certificates of: UK:U
Who is Sofia gubaidulina?
unknown identity
What is the Melting Point of Meitnerium element?
Unknown
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 boiling point of nobelium?
Its melting point is unknown....
What is mendelevium's melting point and boiling point?
The melting point of mendelevium is 827 °C (1521 °F).
