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The halogen that undergoes sublimation at room temperature is?
The halogen that undergoes sublimation at room temperature is iodine.
Which halogen sublimes to violet vapours?
iodine is the only halogen in solid form. so it is the halogen which gives violet vapours on sublimation...
What characteristics must a compound possess to be effectively purified by sublimation?
To be effectively purified by sublimation, a compound should have a high vapor pressure at a temperature below its melting point, be stable under sublimation conditions, and have minimal decomposition or side reactions. Additionally, the impurities should have different sublimation temperatures to allow for separation during the process.
Why use an evaporating dish instead of a beaker for sublimation?
An evaporating dish is better for sublimation because it has a wider surface area which allows for faster evaporation of the solid substance. This helps in obtaining the purified sublimate more efficiently. Additionally, the flat bottom of the evaporating dish ensures even heating, which is important for the sublimation process.
When is purification by sublimation applicable?
Purification by sublimation is applicable when the compound of interest has a much lower or higher vapor pressure compared to the impurities, allowing for selective purification by converting the compound directly from solid to vapor state and back to solid without passing through the liquid phase. This method is effective for separating volatile compounds from non-volatile impurities or vice versa, and is commonly used in industries such as pharmaceuticals and semiconductors for purifying substances.
The halogen that undergoes sublimation at room temperature is?
The halogen that undergoes sublimation at room temperature is iodine.
Which halogen sublimes to violet vapours?
iodine is the only halogen in solid form. so it is the halogen which gives violet vapours on sublimation...
Why common salt cannot be purified by sublimation?
Because salt doesn't sublime !
What characteristics must a compound possess to be effectively purified by sublimation?
To be effectively purified by sublimation, a compound should have a high vapor pressure at a temperature below its melting point, be stable under sublimation conditions, and have minimal decomposition or side reactions. Additionally, the impurities should have different sublimation temperatures to allow for separation during the process.
Why common salt cannot purified by sublimation?
Common salt, or sodium chloride, cannot be purified by sublimation because it has a high melting point (801°C) and does not sublime at normal temperatures and pressures. Sublimation is the process of a substance transitioning directly from a solid to a gas without passing through the liquid phase, which is not applicable to sodium chloride.
How can a solid be purified?
A solid can be purified through techniques such as recrystallization, distillation, sublimation, or chromatography. These methods involve separating impurities from the desired compound based on differences in properties like solubility, boiling point, or affinity for a stationary phase.
Is KCL and NaCl is separated by sublimation?
Sodium chloride is not purified by sublimation.
Why Camphor can easily be purified by the process of sumlimation and common salt cannot be purified by sublimation?
Camphor is a molecular compound, with a molecular formula C10H16O. Because it is molecular and the solid is "held together" by inter-molecular forces it has a lower melting point 175 C and boling point 204C than sodium chloride mp 800+C. bp 1400+ C. Under gentle heating solid camphor has a a reasonable vapor pressure and sublimes (no melting or boiling required -as it is flammable care is needed.) Sodium chloride a giant ionic lattice held together by strong electrostatic bonds when under heated gently has virtually no vapor pressure and does not sublime.
Why use an evaporating dish instead of a beaker for sublimation?
An evaporating dish is better for sublimation because it has a wider surface area which allows for faster evaporation of the solid substance. This helps in obtaining the purified sublimate more efficiently. Additionally, the flat bottom of the evaporating dish ensures even heating, which is important for the sublimation process.
When is purification by sublimation applicable?
Purification by sublimation is applicable when the compound of interest has a much lower or higher vapor pressure compared to the impurities, allowing for selective purification by converting the compound directly from solid to vapor state and back to solid without passing through the liquid phase. This method is effective for separating volatile compounds from non-volatile impurities or vice versa, and is commonly used in industries such as pharmaceuticals and semiconductors for purifying substances.
What is the process called when ice turns into water vapor?
I think the answer is sublimation
Does sublimation also mean turning from a gas straight to a solid?
The word 'sublimation' can be used two different ways in relation to gas/solid phase changes.1- Sublimation is the direct conversion of a solid to gas.The reverse process, gas to solid, is referred to as deposition.2- However, the term 'sublimation' is also used for a process for purifying a solid by heating it in an apparatus to make it turn into a gas (sublimation) and then cooling the gas back to a solid on a special cold surface (deposition). The impurities are left behind and the purified solid is gathered from the collecting area.The whole process is referred to as 'subliming' or 'sublimation', with the 'deposition' part just accepted as part of the process. This technique dates back to the alchemists.So sublimation can mean:-the change of a solid to gas or-a purifying process that features both sublimation and deposition.The term 'sublimation' is not used to mean a gas to solid change all by itself.
