Chemistry Blog

Tag Archive: Chemistry Lab Demonstrations

May 01

Chemistry Demonstration MotherloadMother Lode


I stumbled upon this page today.  (gee, woulda been nice to know about it during my labs this semester…) 6 pages of video after video of chemistry demonstrations.  You’ll never get bored! Kent’s Chemical Demonstrations Movies

Apr 10

Chemistry Lab Demonstrations: Candy Chromatography


silicaspots

*For more cool stories, pictures, and videos of chemistry demonstrations, click here* Last lab of the semester today. Next week is the lab final and checkout. This week the students practiced column chromatography. They purified their crude product mixture from last week’s nitration lab. I’ve talked about the theory behind column chromatography before, so I …

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Apr 03

Chemistry Lab Demonstrations: Silver Nitrate/Copper Wire


nitration

*For more cool stories, pictures, and videos of chemistry demonstrations, click here* This week in lab, students performed electrophilic aromatic substitution (and here).  Dissolution of 4-methylacetanilide in 70% nitric acid gives mono nitration.  There are two possible products.  The acetamide is a better ortho/para director than the methyl group, so 2-nitro-4-methylacetanilide is the major product …

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Mar 27

Chemisry Lab Demonstrations: Nylon Rope Trick


amide

*For more cool stories, pictures, and videos of chemistry demonstrations, click here* This week’s lab involved taking the unknown carboxylic acid from experiments 1 (acid/base extraction) and 2 (purification by recrystallization) and converting it to a primary amide. The acid was refluxed in neat thionyl chloride and added dropwise to 30% ammonium hydroxide. Extract with …

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