1 / 9

Distillation & Chromatography

Distillation & Chromatography. http://www.homechemistry.org/view/Distillation_Apparatus. Today’s Lesson. Distillation & Chromatography Copper Sulfate Experiment (Crystallization) Chromatography Experiment (time dependent). Distillation.

michi
Download Presentation

Distillation & Chromatography

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Distillation & Chromatography http://www.homechemistry.org/view/Distillation_Apparatus

  2. Today’s Lesson • Distillation & Chromatography • Copper Sulfate Experiment (Crystallization) • Chromatography Experiment (time dependent)

  3. Distillation • So, how can we remove a solvent (a liquid) from a solution (also a liquid)?? • It’s can be easy, if both have different boiling points!! • We can distill the solvent and leave the solution. http://www.highland-spirit.com/acatalog/Distilling_Appliance_Stills.html

  4. Simple Distillation • The method goes a something a little like this: • The solution is heated in the flask until it boils. Once the steam rises, it goes into the condenser so it can cool. • The condenser is cold, so the steam condenses into a liquid • The liquid drops into a beaker. The liquid is in pure form. http://www.docbrown.info/page01/ElCpdMix/EleCmdMix2.htm

  5. Fractional Distillation • When two liquids boil near the same temperature (ethanol and water), the fractionating column cools the water and it goes back into the solution. • The ethanol is then cooled by the condenser and comes out as a pure form (if used well!!) • Two different liquids can also be separated (like oil and water) in a separating funnel. http://www.docbrown.info/page01/ElCpdMix/EleCmdMix2.htm

  6. Chromatography • Chromatography is separating a mixture using a solvent (like water for water based inks) and a support such as filter paper. • The paper absorbs each part of the mixture differently (it can separate different colors in inks) http://www.scienceprojectlab.com/paper-chromatography-experiment.html

  7. Experiment • Crystallization of Copper Sulfate. • Set up a bunsen burner and boil approximately 50 mL of water to boiling point. • Add Copper Sulfate until it becomes a dark blue. It should not dissolve any more. Try and not have too much down the bottom as a suspension. • Let it cool and then filter.

  8. Questions • Complete Q 1-5 on P258/259. Do this while the Copper Sulfate crystals are cooling. • If we run out of things to do Read "A Closer Look At Gases' P230-231 and answer Q1, 2, 3, 4 & 5.

  9. Time Dependant • Get some filter paper. Get a colored pen and mark a medium size dot at least 1 cm from the bottom. • You can also choose to use smarties. Your teacher will give you instructions to do this!! • Put the piece of paper in a small beaker with water touching the bottom of the filter paper. • Wait and it will separate the colors (if it is not pure)…

More Related