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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.
Wiki User
∙ 12y ago
Wiki User
∙ 13y agoWhen the organic compound is volatile in nature and the impurities aren't volatile in nature, Sublimation is used for example Camphor is purified through sublimation
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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.
Other methods of purification and separation of organic compounds?
Various methods used for purification and separation of organic compounds are: i) Crystallisation ii) Fractional Crystallisation iii) Sublimation iv) Distillation v) Extraction with solvents vi) Chromatography.
What is the name of a solid turning into a gas?
sublimationAnswersublimation AnswerSublimation Its Sublimation
What do you call when a solid turns straight into a gas?
A solid that turns directly into a gas is dry ice. Sublimation
What is the change from a solid directly to a gas is called?
When a solid turns directly into a gas without becoming a liquid it is called sublimation. The reverse of this process is called deposition.
Why is crystallization a much better purification technique than simply washing the crystals with cold solvent?
because sublimation is a method of obtaining a product of high purity; it is best adapted to use with small amounts of material; there is little loss of material in sublimation; and the process of sublimation requires less time and transferring.
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.
Other methods of purification and separation of organic compounds?
Various methods used for purification and separation of organic compounds are: i) Crystallisation ii) Fractional Crystallisation iii) Sublimation iv) Distillation v) Extraction with solvents vi) Chromatography.
What is the purpose of the sublimation and recrystallization steps?
Recrystallization and Sublimation are two commonly encountered methods of Purification. Several of these are done in the laboratory to obtain a pure sample of a particular organic compound. Recrystallization literally means to crystallize again. Sublimation involves heating the compound at low pressure from one apparatus and and condensing it in another. This is quite the same as distillation but of solid state.
What is the process called when ice turns into water vapor?
I think the answer is sublimation
What is the name of a solid turning into a gas?
sublimationAnswersublimation AnswerSublimation Its Sublimation
What do you call the process of a solid changing to a gas?
sublimation. for example when dry ice changes directly to a gas.
What do you call when a solid turns straight into a gas?
A solid that turns directly into a gas is dry ice. Sublimation
Give you an examples of sublimation in science?
The opposite of sublimation, where a solid changes to a gas is called deposition, NOT SUBLIMATION! Hope that clears it up :).
What is it called when a solid changes directly into a gas?
It is called sublimation.
What is the change from a solid directly to a gas is called?
When a solid turns directly into a gas without becoming a liquid it is called sublimation. The reverse of this process is called deposition.
Is sublimation a physical change?
Sublimation is a physical change.
