ReactiveChem - 2021-07-15
I make some shit and it looked like shit
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Thunderstorms are always great when doing chemistry basically outside. Especially when you do chem in a shed or something which is quite a common thing for amateur chemists. Definitely looking forward to the next vid.
It’s the humidity that’s the worst
You might want to dry EtOH using calcium chloride instead; it doesn't come over in the distillation. Good work all around though! Btw afaik the dow grease can off-gas when it hasn't been purged by heat + vacuum, which might have caused the spoiling of your ethoxide product.
CaCl2, although often suggested, is mostly not recommendable, because it dissolves in ethanol and can form addition products. Yet, I couldn't find anything on how it would play out in practice exactly.
It's probably never used as there are plenty of other simple methods to chose from.
@realedna AFAIK yes it does dissolve some in th EtOH so you do incur a loss of product/solvent, but it doesn't form an azeotrope and doesn't transfer over through distillation (one would be doing a still head temp controlled distillation not a total distillation, as it's possible to drive off the water from the Ca salts with too much heat applied). It was the standard water-retaining salt to use when I went to school many moons ago and sieves were too costly.
@Oxonium Girl using calcium chloride to dry ethanol causes a gel-like formation to occur and the ethanol won't distill to completion. It takes forever for the smallest amount to distill over.
I thought molecular seives can make pure ethanol
They are pretty cheap
They can but I didn’t have any
@ReactiveChem They are actually the best and easiest method. They should be easily available everywhere and can be reused. Also applicable to various other solvents.
See: http://ccc.chem.pitt.edu/wipf/Web/Solvent_Drying.pdf
(also contains measurements of residual water content after various periods)
Finally a new chemistry YouTuber let’s just hope he doesn’t stop and to top it off his Australian just like Tom from explosions&fire
Backyard Science 2000 - I get my sodium from him as well :-) he's awesome
Could u have used good molecular secieves? You did a good job.
Sodium ethoxide is annoyingly sensitive to air. It's always best to prepare alkoxide solution fresh to avoid this air oxidation issue-- you can speed the reaction of the metal up by adding a little bit of methanol
Ah didn’t know that, I did use this less than 12 hrs after it was made (for rxn) so it wasn’t too old but it still turned black
That's your mineral oil contamination.
ExtractionsAndIre quoted a well known science madness user who says that green or yellow comes from there being small amount of mineral oil present
Hey, in regards to getting the NaOH off of the Na - Not sure if you know this, but you can actually make sodium ethoxide using NaOH and ethanol. So some NaOH on the outside of your Na is honestly entirely harmless. Its not really an impurity - It actually just contributes to the reaction (though not very much).
I just did this reaction - Also with BYS2K's NaOH, and it seems to have worked ok.
The problem with this reaction specifically is that the reaction of naoh with ethanol creates a reversible rxn of: naoh+etoh<->naoet+h2o. So this does create sodium ethoxide however it produces weather which reverts it back to naoh and it keeps doing this because nothing can remove that water, at least in this specific rxn. The paper also said that naoh destroys the yield so I just listened to what it said. Other wise yea theoretically it should work fine.
A better way to keep stuff like this dry is using a rubber stopper and putting a siringe with an argon balloon attached through it.
As to what happened to your sample, it could be that the gas you used was not dry. You can attempt a retry with a drying train. See Vogels Practical Chem, if you don't have it I can send some scans
Sure, if you have a link I’d like to see them
Please do a video on making tatp, hmtd, onc.
ohhh looking forward so much for the next video!
Wait, isn't ethanol stronger acid then acetylene? So putting carbide in ethanol should form calcium ethoxide
It could be a small impurity but the unfavorable equilibrium of deprotonated ethanol to protonated acetylene and the fact that they won’t react with the insoluble calcium hydroxide means it likely wouldn’t make too much calcium ethoxide. But that’s just my opinion I’m sure someone else more professional could give a better more accurate answer.
8:15 Did you say 𝒀𝑬𝑳𝑳𝑶𝑾?!
[PTSD flashbacks intensify]
How did you get your font like that?.. lol
Sodium ethoxide, shit grade
Yellow strikes again. Thats what happened
True
Yellow chem bad
Interesting chemistry too bad it did not work.
Well it did, just a much lower yield in the next vid
Somehow I got un-subbed from your channel
That’s quite odd, guess that’s just shittube at it again
Early gang
Welcome to the early club
R Johnson - 2021-12-31
8:50 Hypothesis by a relatively inexperienced hobby chemist: What substance did you use to grease the stoppers?
Some substances are surprisingly good at dissolving oxygen, which might then diffuse through...