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What characteristics must a compound possess to be effectively purified by sublimation?
Wiki User
∙ 11y ago
The only requirement is that the solid must have a slight vapor pressure under the applied conditions. Sublimation happens below triple point pressure.
Wiki User
∙ 11y ago
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Which halogen is purified by sublimation?
iodine
What compound can be used to demonstrate sublimation?
The compound in the mixture that is the sublimate would be whatever compound has passed directly from the solid to the gas phase without entering the liquid phase in between.
When is purification by sublimation applicable?
purification by sublimation is applicable when the solid has a relatively high vapor pressure at temperature below its melting point. it is also applicable when the purity has a lower vapor pressure than the purified, and when a small quantity of the solid is used. this process can also be used when compounds display characteristic property of condensing the solid state without passing through the liquid state.
What laboratory equipment of sublimation?
Sublimation apparatus is a piece of laboratory glassware used in the technique of sublimation usually used by chemists to purifycompounds. Typically a solid is placed in a vessel which is then heated under vacuum. Under this reduced pressure the solid volatilizes and condenses as a purified compound on a cooled surface, leaving the non-volatile residue impurities behind. This cooled surface often take the form of a cold finger. Once heating ceases and the vacuum is released, the sublimed compound can be collected from the cooled surface.
What purpose did the vacuum serve during the sublimation purification of caffeine?
it is used because some organic compounds do not sublime at atmospheric pressure so by using the vacuum it substantially reduces the pressure so that they can be purified by sublimation. it also makes decomposition and melting less likely to occur during the sublimation.
Which halogen is purified by sublimation?
iodine
What compound can be used to demonstrate sublimation?
The compound in the mixture that is the sublimate would be whatever compound has passed directly from the solid to the gas phase without entering the liquid phase in between.
When is purification by sublimation applicable?
purification by sublimation is applicable when the solid has a relatively high vapor pressure at temperature below its melting point. it is also applicable when the purity has a lower vapor pressure than the purified, and when a small quantity of the solid is used. this process can also be used when compounds display characteristic property of condensing the solid state without passing through the liquid state.
Why common salt cannot be purified by sublimation?
Because salt doesn't sublime !
What laboratory equipment of sublimation?
Sublimation apparatus is a piece of laboratory glassware used in the technique of sublimation usually used by chemists to purifycompounds. Typically a solid is placed in a vessel which is then heated under vacuum. Under this reduced pressure the solid volatilizes and condenses as a purified compound on a cooled surface, leaving the non-volatile residue impurities behind. This cooled surface often take the form of a cold finger. Once heating ceases and the vacuum is released, the sublimed compound can be collected from the cooled surface.
Why common salt cannot purified by sublimation?
vapour pressure of common salt is higher... hence it cannot be sublimed...
What purpose did the vacuum serve during the sublimation purification of caffeine?
it is used because some organic compounds do not sublime at atmospheric pressure so by using the vacuum it substantially reduces the pressure so that they can be purified by sublimation. it also makes decomposition and melting less likely to occur during the sublimation.
Is KCL and NaCl is separated by sublimation?
Sodium chloride is not purified by sublimation.
Is purified water mixture?
i think purified water is not a mixture because even when water is purified it still has two hydrogen atoms and 1 oxygen atom so it still remains a compound
What the definition of chemical?
A compound or substance that has been purified or prepared, especially artificially.
Solvent used in purification?
It is not possible to tell specifically unless the compound that needs to me purified is given. However most of the organic solvents and sometimes even water are used as solvents for purification depending on the nature of the compound to be purified.
What is Purified isophtalic acid?
Purified isophtalic acid is an organic compound that is used in the creation of commercial polymers. The acid is also used in the production of fire resistant materials.
