Hey guys, in this epic segment, we are making some benzoic acid from sodium benzoate. This is a good example of regenerating an acid from its salt form.
Doug's Lab video: https://www.youtube.com/watch?v=C31AKmRi69Q
New Channel: https://www.youtube.com/watch?v=Ke_xIs5f1sA
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https://www.youtube.com/watch?v=vGND_cTU4jw
Sometime last year, I got really interested in microwave plasma, which can be made from a lot of things like lit matches, aluminum foil or just some grapes. However, when I went searching for more info about it, I really couldn't find much of anything. There was also no explanation as to why it was yellow every time, regardless of what it was made from.
So, I decided to investigate this a little bit and try to get to the bottom of it.
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Video references:
Steve Mould: https://youtu.be/8bXhsUs-ohw
Veritasium (new grape video): https://youtu.be/wCrtk-pyP0I
Veritasium (old grape video): https://youtu.be/RwTjsRt0Fzo
Applied Science (Ben): https://www.youtube.com/user/bkraz333
Applied science video on making potassium glass: https://youtu.be/y02AXdec1sE
Walter Mitty: https://www.youtube.com/watch?v=Lys1pcZbPM0
RUPhys2012: https://www.youtube.com/watch?v=lhpndQJkNk0
Stupideaproductions: https://youtu.be/G7lfzA7WzVI
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https://www.youtube.com/watch?v=l0u8Vtf2GoQ
Today we make some Trans-cinnamic acid from benzaldehyde and malonic acid. The reaction is called the Verley-Doebner modification of the Knoevenagel Condensation.
The classic Knoevenagel Condensation is similar to the Aldol Condensation
Prep that I followed: http://www.chemistry.mcmaster.ca/~chem3d3/expt5-7.pdf.gz
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https://www.youtube.com/watch?v=RWDfBtrGVCY
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Today, I'm going to be exploring the science of azo dyes. This class of dyes is one of the most popular and it is used to dye clothing in a unique way. It is based on a reaction known as "azo coupling" where two dye components are developped directly on/in the textile fibers.
The Para Red is not the best though and it is very prone to rubbing off and washing away. Because of this, other dyes are often used instead. Also, I used only one dye here, but combinations can sometimes be used to increase the vibrancy and "richness" of the color.
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https://www.youtube.com/watch?v=vPSJRhg4dYk
In this video phenol is synthesized from salicylic acid.
I followed the procedure that I found here: http://www.sciencemadness.org/talk/viewthread.php?tid=27617
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https://www.youtube.com/watch?v=A0e0BDEE4Ic
REUPLOADED DUE TO SOUND ISSUE.
In this video we make and demonstrate the oxidizing power of piranha solution. Piranha solution is a 3:1 mixture of sulfuric acid to hydrogen peroxide.
NOTE: I used nitrile gloves in this video. It is recommended that you do not use nitrile, but instead use latex or vinyl gloves.
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https://www.youtube.com/watch?v=cLpSapjKcxM
I recently just filled up this bottle, and it's actually still kind of warm. What I think is really interesting though is that when I shake it, it changes color.
Nile talks about lab safety (Chemistry is Dangerous): https://youtu.be/ftACSEJ6DZA
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#shorts
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https://www.youtube.com/watch?v=wE-cNpIxn40
The synthesis of iron (II) sulfide involves reacting 1 equivalent of sulfur with 1 equivalent of iron. The reaction is initiated by a hot glass stirring rod into it. It is an extremely exothermic reaction.
This is an interesting reaction to use as a demonstration, but the product is useful. The Iron (II) sulfide, or FeS, can be reacted with hydrochloric acid to produce hydrogen sulfide gas. This is a very useful gas, but it is extremely toxic.
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https://www.youtube.com/watch?v=NxAeQneITNA