Yay Potassium thermite!
I had a great time doing this project with you, I hope we can do a lot more stuff like that in the future. ;-)
In the late โ70s 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.
I can't stop watching this video ๐ A video on growing metal Crystal's would be insanely awesome ๐
maybe the magnesium was an alloy called "Elektron" it contains zinc and some rare earths that could cause the pyrophoric effect you experienced.
2:39 you know things are getting real when you use the cardboard box funnel ๐
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.
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
+1 vote for an apparatus to make various metal crystals. Final products should look good!
And thatโs how the first German reached the moon.
*peacefully testing the potassium maker* NurdRage: umm so hey guys isn't that a thermite reaction *blows up*
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.
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.
Great video! The system worked great, the yield was insane and the E&F reference was perfectly placed.
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 ๐) 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.
3:55 You already took care of it by being a cameraman. Cameraman never dies.
Potassium graphite is pyrophoric. You have carbon and potassium :)
"Hmm. This picture is not correct" K.
that is quite the brick! whats next? potassium brick house? lebkuchen haus from potassium metal??
@custos3249