Simple Science - Digest Experiences # 39

Soon the term of our blog "Simple Science" will end, first on Habré, now on Giktayme, and today we are publishing the final digest of our experiments in the form in which it has been published for more than two years.

In today's release:

• silver mirror;
• luminol and red blood salt;
• collapsing barrels;
• hydrogel balls.

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Silver mirror

Chemical reaction of silver reduction from Tollens reagent. Read more about the reaction of the silver mirror on WiKi .

Luminol and red blood salt

The experiment demonstrates the chemiluminescent properties of luminol, which are manifested in the presence of an oxidizing agent. For this purpose, hydrogen peroxide (H2O2) in an alkali solution can be used.

In the presence of a catalyst, a red blood salt, hydrogen peroxide decomposes to form oxygen and water.

When luminol interacts with hydroxide ions, a dianion is formed, which interacts with oxygen. The product of this reaction is an extremely unstable organic diradical, which instantly decomposes to form nitrogen and a 3-aminophthalic acid molecule in the excited electronic state. When the molecule returns from the excited to the ground electron state, a photon is released.

For the experience you will need: luminol, hydrogen peroxide, red blood salt, alkali.

Barrel collapse

After the publication of our next video on Lepre, one of the viewers under the nickname TheWho made his version of the experiment ending. We do not know the name of this person, only we know that he is from the city of Omsk. Big respect to you, TheWho! I hope you like this version as well as us;)

Hydrogel balls

I remind you about our books .