3D Sublimation by https://padlet.com/neo_si_lie_charles/6jpua74ry6c6 Made with no regrets, whatsoever en-us 2018-01-23 10:24:48 UTC 2018-01-30 07:09:40 UTC hello@padlet.com 1.what type of mixtures can be separated by the given method shermine16 https://padlet.com/neo_si_lie_charles/6jpua74ry6c6/wish/225949277  You can use sublimation to separate a mixture of solids, one of which can undergo sublimation. You heat the mixture and then cool the vapours separately to recover the sublimed solid . Some substances that sublime are iodine, ammonium chloride, naphthalene, camphor, and sulfur. Videohttps://youtu.be/HyrEtTPnc5I]]> 2018-01-30 06:41:06 UTC https://padlet.com/neo_si_lie_charles/6jpua74ry6c6/wish/225949277 2.using an example of a suitable mixture,describe how can we separate the mixture by the given method. shermine16 https://padlet.com/neo_si_lie_charles/6jpua74ry6c6/wish/225949515 .Sublimation is the phase transition of a substance directly from the solid to the gas phase without passing through the intermediate liquid phase.

]]> 2018-01-30 06:43:32 UTC https://padlet.com/neo_si_lie_charles/6jpua74ry6c6/wish/225949515 3.what are the principles(key scientific concept)involved in the given method? shermine16 https://padlet.com/neo_si_lie_charles/6jpua74ry6c6/wish/225949878 Sublimation is a phase transition that occurs at temperatures and pressures below what is called the "triple point" of the substance (see phase diagram). The process is an endothermic change—that is, a change in which heat is absorbed by the system. The enthalpy of sublimation can be calculated as the enthalpy of fusion plus the enthalpy of vaporization.]]> 2018-01-30 06:47:25 UTC https://padlet.com/neo_si_lie_charles/6jpua74ry6c6/wish/225949878 5 what are the applications of the method?(Shawant) https://padlet.com/neo_si_lie_charles/6jpua74ry6c6/wish/225949988  If you forget a piece of dry ice on the kitchen counter you may return to find it has disappeared without a trace. Generally, when you add heat to a solid it will melt into a liquid, but sublimation is a special phase change that skips the liquid phase all together. A piece of frozen water, more commonly called ice, melts into a puddle but dry ice skips the liquid phase. It never "melts" instead turns directly into a gas.
]]> 2018-01-30 06:48:29 UTC https://padlet.com/neo_si_lie_charles/6jpua74ry6c6/wish/225949988 4. What are the precautions,if any ,to take note of the given method?(Timothy) https://padlet.com/neo_si_lie_charles/6jpua74ry6c6/wish/225950000  
  • Safety glasses are to be worn whenever working with acids, bases, or any flammable materials.
  • Let the instructor know immediately about any glassware breakage or chemical spills that may occur so that proper cleanup procedures can be instituted.
  • Use pipet fillers whenever pipeting any fluid.Whenever working with acids or bases, have the chemicals available at your work station, do not carry pipets with fluid across the room.
  • When diluting acids, pour the acid into the water, NOT water into acid as this may cause spattering of the acid.
  • When acid is mixed with another reagent, an exothermic reaction may occur which heats up the container, This is natural, so do not panic and spill contents.
  • All volatile materials must be handled in a hood with the exhaust fan on.When refluxing any solutions, perform this operation under a hood, and use boiling beads in the reflux vessel to prevent any excessive "bumping" and possible glass breakage.
  • Use heat-resistant gloves and/or tongs when handling hot glassware, chinaware, etc.
  • Use plastic gloves when handling any hazardous materials to prevent skin contact.
  • Label and date all chemical mixtures that are made up and kept for future use.
  • Do not store basic solutions in glass containers with glass stoppers, use plastic or rubber stoppers.
  • Dispose of all used solutions in an approved manner as directed by the instructor.
  • Empty all used inoculated bacteriological media from test tubes or dishes into a designated container so that it may be sterilized before disposal.
  • Before leaving, turn off all power and heat to the apparatus you have used, or place in the standby mode.
  • Clean all spatulas, glassware, and dishes after use and before storage to prevent contamination.
  • Return all chemicals you are using to their proper storage space.Be familiar with the use of the eye-wash, the laboratory shower (if equipped), and the first-aid kit if they are needed at any time. 
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