NurdRage | ALS Liquid Nitrogen "Ice Bucket Challenge" (Ft. Muhammad Qureshi) @NurdRage | Uploaded 10 years ago | Updated 28 seconds ago
The ice bucket challenge and donation link: http://www.alsa.org/fight-als/ice-bucket-challenge.html

Featuring fellow chemist Muhammad Qureshi, @moe_qureshi

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$Make Alkyl Halides Bromoethane and Bromohexane In this video we make the alkyl halides bromoethane and bromohexane by nucleophilic substitution of alcohol under acidic conditions. the highest yielding method is to use alcohol with hydrobromic acid and sulfuric acid. To make bromoethane 350g of 48% hydrobromic acid, 120mL of ethanol and 145mL of sulfuric acid were combined in a flask cooled in ice with plenty of time between additions to allow full cooling. The mixture was then gently heated to 40 degrees Celsius and slowly ramped to 70 Celsius to distill off the bromoethane that forms. Whats happening is the classic Sn2 nucleophilic substitution reaction taught in basic organic chemistry. The alcohol is protonated by the acid conditions and essentially forms water still attached to the carbon backbone. Bromide ions come in and attack the carbon and the water leaves. This forms bromoethane. The bromohexane is washed with water and 5% sodium bicarbonate solutions before being dried with anhydrous magnesium sulfate. Bromohexane is made in a similar fashion. 1 mole of 1-hexanol is mixed with 1.5 moles of sodium bromide and 2 moles of sulfuric acid. the mixture is refluxed for six hours and the bromohexane is recovered using a separatory funnel. it is then distilled and washed. Then fractionally distilled to remove water. Related videos: Make hydrobromic acid: https://www.youtube.com/watch?v=C3n4Xqfb9qk Make Chloroform: https://www.youtube.com/watch?v=MvkuqLxQd2c Make chlororobenzyl chloride: https://www.youtube.com/watch?v=4DQuv6LjB80 Donate to NurdRage! Through Patreon (preferred): https://www.patreon.com/NurdRage Through Bitcoin: 1NurdRAge7PNR4ULrbrpcYvc9RC4LDp9pS Glassware generously provided by http://www.alchemylabsupply.com/ Use the discount code nurdrage for a 5% discount. Social media links: Twitter: https://twitter.com/NurdRage Facebook: https://www.facebook.com/NurdRageYoutube/ Instagram: https://www.instagram.com/nurdrageyoutube/$

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ALS Liquid Nitrogen "Ice Bucket Challenge" (Ft. Muhammad Qureshi) @NurdRage