What is the literature melting point of aspirin?
What is the literature melting point of aspirin?
The melting point range of pure aspirin is 138-140 °C and the melting point range of the salicylic acid starting material is 158-161 °C.
Why does aspirin have a high melting point?
This means aspirin is less capable of form hydrogen bonds with other -OH on adjacent molecules, being the acetyl group a less polar one. The stronger the intermolecular attractions among adjacent molecules, the more energy is required to take molecules apart in the solid and, therefore, the higher the melting point.
What is the boiling point of pure aspirin?
Predicted data is generated using the ACD/Labs Percepta Platform – PhysChem Module
| Density: | 1.3±0.1 g/cm3 |
|---|---|
| Boiling Point: | 321.4±25.0 °C at 760 mmHg |
| Vapour Pressure: | 0.0±0.7 mmHg at 25°C |
| Enthalpy of Vaporization: | 59.5±3.0 kJ/mol |
| Flash Point: | 131.2±16.7 °C |
What is the expected M z value for the M )+ of aspirin having a molecular formula of C9H8O4?
0
3.1Computed Properties
| Property Name | Property Value | Reference |
|---|---|---|
| Formal Charge | 0 | Computed by PubChem |
| Complexity | 212 | Computed by Cactvs 3.4.8.18 (PubChem release 2021.05.07) |
| Isotope Atom Count | 0 | Computed by PubChem |
| Defined Atom Stereocenter Count | 0 | Computed by PubChem |
What is a literature melting point?
As a compound’s melting point is a physical constant, it can be used to support the identity of an unknown solid. The melting point can be looked up in a reference book (this value would then be called the “literature melting point”), and compared to the experimental melting point.
Does aspirin have a high or low melting point?
Physical properties. Aspirin, an acetyl derivative of salicylic acid, is a white, crystalline, weakly acidic substance, with a melting point of 136 °C (277 °F), and a boiling point of 140 °C (284 °F).
How do you find the molecular formula of aspirin?
C₉H₈O₄
Aspirin/Formula
What is melting point determination?
Melting point determination is the thermal analysis most frequently used to characterize solid crystalline materials. It is used in research and development as well as in quality control in various industry segments to identify solid crystalline substances and to check their purity.
How does melting point range of a pure sample compare with that of an impure sample?
Determining the melting point of a compound is one way to test if the substance is pure. Impurities tend to depress and broaden the melting range so the purified sample should have a higher and smaller melting range than the original, impure sample. …
What is the boiling point of aspirin?
Physical properties. Aspirin, an acetyl derivative of salicylic acid , is a white, crystalline, weakly acidic substance, with a melting point of 136 °C (277 °F), and a boiling point of 140 °C (284 °F). Its acid dissociation constant ( pKa) is 3.5 at 25 °C (77 °F).
What is the density of aspirin?
Question: Aspirin has a density of 1.40 g/cm3. A. What is the volume (in cubic centimeters) of an aspirin t… Aspirin has a density of 1.40 g/cm3.
What is the molecular formula of aspirin?
Aspirin, which the chemical name acetylsalicylic acid (ASA), is medication extensively used around the world as an anti-inflammatory and anti-pyretic. Formula and structure: The acetylsalicylic acid chemical formula is C9H8O4 and the extended formula is CH3COOC6H4COOH. The molecular mass is 180.159 g mol-1.
