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The Old Nassau reaction or Halloween reaction is a chemical clock reaction in which a clear solution turns orange and then black. This reaction was discovered by two undergraduate students at Princeton University researching the inhibition of the iodine clock reaction (or Landolt reaction) by Hg 2+ , resulting in the formation of orange HgI 2 .
The author Jill Murphy began writing The Worst Witch at the age of 15, while still at school, and based many points of the stories on her own school experiences at Ursuline Convent in Wimbledon, England, with Singing becoming Chanting, Chemistry becoming Potions and so on. [5]
They then come to life as trees and destroy the potion laboratory, after which Bonzo goes missing. Miss Cackle seizes the opportunity for a complete modernization of the laboratory and decides to invite the Chair of the School Governors (who happens to be Mr Hallow, Ethel's father) to inspect the damage and hopefully pay to re-equip the laboratory.
The Potion Macchiato and other seasonal treats are available now for a limited time, so you should make a run to your nearest Dunkin’ before they disappear for good. My crystal ball says: I’ll ...
They find Bea in the potions lab, where she ended up after sneezing and Ethel takes the potion, which works, but the cloned Ethel causes mischief. The cloned Ethel takes Ethel's place in chanting and when Miss Bat falls asleep, the cloned Ethel puts a potion in Miss Bat's drink, causing her hair to be spiked and green, horrifying Algernon.
Halloween in Chicago means crisp air, hot cider and tons of spooky events. Chicagoans go nuts for the macabre! This isn’t new. Some of the events on our list, like Splatter Theater, a live ...
The Gilbert U-238 Atomic Energy Laboratory was packaged in a customized metal case. The Gilbert U-238 Atomic Energy Lab is a toy lab set designed to allow children to create and watch nuclear and chemical reactions using radioactive material. The Atomic Energy Lab was released by the A. C. Gilbert Company in 1950.
A selection of chemicals included in the chemistry set "Chemistry 4" from Salter Science. Some of the chemistry sets produced by Salter Science contained this tube of Patent Blue V, under the name of "Sky Blue". The dye colors water blue, but turns green in acidic solutions.