@custos3249

This is why you never leave your Germans at home unsupervised

@NurdRage

Yay Potassium thermite!

@EliasExperiments

I had a great time doing this project with you, I hope we can do a lot more stuff like that in the future. ;-)

@darylcheshire1618

In the late โ€˜70s I purchased about 100g of potassium, when I left my home to live in a flat, I took the potassium in paraffin on a suburban train to a technical college where I handed it over.
Nowadays I shudder to think I carried potassium on a suburban train (not to mention the yellow phosphorus).
The half litre of bromine I tipped down a drain.
The half kilo of sodium, I reacted with methylated spirits on the edge of a lake. No issues.

@friskydingo5370

I can't stop watching this video ๐Ÿ˜ 
A video on growing metal Crystal's would be insanely awesome ๐Ÿ‘Œ

@SomnolentFudge

maybe the magnesium was an alloy called "Elektron" it contains zinc and some rare earths that could cause the pyrophoric effect you experienced.

@Foxy-za

2:39 you know things are getting real when you use the cardboard box funnel ๐Ÿ˜‚

@zeno-bn7uf

That is by far the most potassium I have seen in any one placeโ˜  , the beautiful purple hue is also super visible whilst pouring the ingot under mineral oil.

@gleya4987

i know im being that one guy but PLEASE wear your ppe more, you really do need it here. getting burning alkali metals on your skin is horrifically painful, and even a little bit can cause a lot of damage. love the video tho! cant wait to see more

@bobmcbob4399

+1 vote for an apparatus to make various metal crystals.  Final products should look good!

@German_overengineer

And thatโ€™s how the first German reached the moon.

@user-pr6ed3ri2k

*peacefully testing the potassium maker*
NurdRage: umm so hey guys isn't that a thermite reaction
*blows up*

@NurdRage

Interestingly enough i also encountered a pyrophoric substance when i did a similar potassium thermite reaction (mine was KOH +Mg), spontaneously exploded in my handed. i don't know what it is either but its reproducible if you're getting it too. some sort of magnesium potassium alloy? idk.

@BackYardScience2000

Very nice!  A little dangerous, but still very nice!  Taking a look at the magnesium crystals under the lid of the still, they look remarkably similar to the magnesium crystals that I keep/sell.  In my opinion, they look like pure magnesium crystals.  If they are an alloy, there shouldn't be much potassium in them.  I would take some of them and test them with water and steam.  Pure magnesium shouldn't react with room temperature water, but it should with steam or boiling water.

@TheBooker66

Great video! The system worked great, the yield was insane and the E&F reference was perfectly placed.

@Luke-cv7bg

Awesome video, well worth the wait.  Clear a huge amount of work went into this behind the scenes.

Just because .... I calculated the energetics (very rough, just Hess's law on the literature heat of formation data)


K2CO3 + 3 Mg --> 2K + 3 MgO + C       DH = - 655 kJ per mole carbonate, or 3.1 kJ/g of reaction mixture (1330 BTU/lb, if that's the appropriate translation to banana units ๐Ÿ™‚)  That's ... a lot.  For comparison, the standard aluminium + iron oxide thermite mix releases just under 4 kJ/g, and that outputs molten iron, so over 1540 C, and this is a bit over 3/4 of the energy density.  Without the cooling bath, it would go well over 1000 C, maybe close to 1200 (somewhere around 2000 F).

The exotherm is so large, I wondered if 3 equivalents of Mg was overkill, and it is, in theory
The reaction
K2CO3 + 2 Mg --> 2K + 2 MgO + CO is still exothermic, DH = - 163 kJ/mol
That is only 1/4 the energy output of the reaction they used here, but still plenty by most standards.

Is it possible that some parts of the charge are a bit short of magnesium?  If so this reaction might happen a bit.  That would make the gas you see later carbon monoxide.  At least worth checking that it isn't, even though you are working outside.

@fungo6631

3:55 You already took care of it by being a cameraman. Cameraman never dies.

@MNs_LAB

Potassium graphite is pyrophoric. You have carbon and potassium :)

@LFTRnow

"Hmm.  This picture is not correct"
K.

@contomo5710

that is quite the brick!
whats next? potassium brick house? 
lebkuchen haus from potassium metal??