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Sniffity
Hazard to Self
Posts: 70
Registered: 27-12-2014
Member Is Offline
Mood: No Mood
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Done, as in personally done?
Sodium in water, methanol + dissolved salts (Emission spectrum, as a demo for my students). I also LOVE using Brady's reagent (2,4-DNPH) to detect
carbonyl groups. And the classic elephant toothpaste! 
Seen?
Decomposition of Mercury Thiocyanate, Barking Dog, Sodium + Chlorine gas, etc... too many!
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Sulaiman
International Hazard
Posts: 3724
Registered: 8-2-2015
Location: 3rd rock from the sun
Member Is Offline
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one of my favourites is 'thunderstorm in a bottle' e.g https://www.youtube.com/watch?v=Nyzlt-dVgWQ
easy to do and impressive for a small audience (family, friends etc.)
add a little of the permanganate at a time
use methylated/de-natured alcohol, acetone is too violent.
using the bottom 1/4 of a conical flask reduces splashing.
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Hawkguy
Hazard to Others
Posts: 326
Registered: 10-10-2014
Location: British Columbia (Canada eh!)
Member Is Offline
Mood: Body is Ready
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I once made my friend eat a banana and drink a big ol' sprite. I'd recommend that one for sure. Before you do it yourself, first give your little
siblings the opportunity to make a coin, and also so you see what it'll be like.
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