My comment below is mainly aimed at the 11-21 year old age range, who trying this with beakers full of it.
I would be grateful if some of you might mention the accident below on other videos, so they are aware that this will turn into another acetone peroxide thing with more accidents and videos being removed.
I realise you're doing this with tiny piles of it but it's important to note that youtube has been pulling peoples videos related to acetone peroxide due to the surge of those that appeared.
Similarly, as you mentioned, there is now a wave of heptoxide videos. Predictably, a post recently appeared at science madness documenting how the police and fire brigade had been called to a teens house, with him being taken to hospital, after a very large explosion occurred in his garage; heptoxide.
so the methanol you got there. where did you get it that you needed to distill it over a desiccant? is the radiator additive heet not pure enough or you don't use that? what impurities did you find objectionable and also how did you distill it "over" a desiccant? I liked the explanation of the action, as well as additional exapmles on paper, followed by a lab, format. reminds me of a chem class.
@demnlordd666 HEET is too impure to use straight. I saturate HEET with NaCl and distill until about 90% comes over to remove most the water and lower-boiling impurities. I then re-distill it with plenty of dry calcium chloride to remove any remaining water. The remaining 10% from the first run is great for use as alcohol burner fuel. For this experiment, straight HEET is probably fine to use since purity isn't really a concern here.
@zhmapper Ok thanks, but by re-distill w/ excess dry CaCl2, do you mean dump it in w/ the 90% heet and distill the mix, or are you packing a colum and drying the vapor going through it? sounds stupid maby but I have asked many people about mixing in a desicant and then distilling and no one ever got back to me. like making ethanol from vodka after you already got down to azeotropic mix.
@demnlordd666 also what is the concept w/ salting the sol? I have heard of it before but college chem was 10yrs ago. more recently I read that you can recover isopropanol from an aq. sol. by salting, but it did not separate out into layers, does it just break the azeotrope and allow the lighter alcohol to distill? so ya Q's on 1) salting concept, 2) desiccant in sol. or no
@zhmapper - Do you do the distillation with the NaCl or the CaCl2 in the distillation flask? Hydrate formation is reversible so you should remove it before you distil. Also at 3:24, your sulphuric anhydride is missing 2 hydrogens and your sulphur is haptavalent, not possible under normal conditions, one of the oxygens on each sulphur should be a hydroxyl instead. You've also done the same thing to your nitric anhydride; pentavalent nitrogen is impossible I'm afraid.
THis would make potassium bisulfate as a biproduct not potassium sulfate see!
KNO3 + H2SO4 --> HNO3 + K2HSO4
mcwario13 3 weeks ago
@mcwario13 There sould be a 2 infront of the KNO3 in the original equation. Potassium bisulfate is KHSO4 not K2HSO4.
99Chemicals 3 weeks ago
My comment below is mainly aimed at the 11-21 year old age range, who trying this with beakers full of it.
I would be grateful if some of you might mention the accident below on other videos, so they are aware that this will turn into another acetone peroxide thing with more accidents and videos being removed.
lexichronicle2 1 month ago
I realise you're doing this with tiny piles of it but it's important to note that youtube has been pulling peoples videos related to acetone peroxide due to the surge of those that appeared.
Similarly, as you mentioned, there is now a wave of heptoxide videos. Predictably, a post recently appeared at science madness documenting how the police and fire brigade had been called to a teens house, with him being taken to hospital, after a very large explosion occurred in his garage; heptoxide.
lexichronicle2 1 month ago
so the methanol you got there. where did you get it that you needed to distill it over a desiccant? is the radiator additive heet not pure enough or you don't use that? what impurities did you find objectionable and also how did you distill it "over" a desiccant? I liked the explanation of the action, as well as additional exapmles on paper, followed by a lab, format. reminds me of a chem class.
demnlordd666 1 month ago
@demnlordd666 HEET is too impure to use straight. I saturate HEET with NaCl and distill until about 90% comes over to remove most the water and lower-boiling impurities. I then re-distill it with plenty of dry calcium chloride to remove any remaining water. The remaining 10% from the first run is great for use as alcohol burner fuel. For this experiment, straight HEET is probably fine to use since purity isn't really a concern here.
zhmapper 1 month ago
@zhmapper Ok thanks, but by re-distill w/ excess dry CaCl2, do you mean dump it in w/ the 90% heet and distill the mix, or are you packing a colum and drying the vapor going through it? sounds stupid maby but I have asked many people about mixing in a desicant and then distilling and no one ever got back to me. like making ethanol from vodka after you already got down to azeotropic mix.
demnlordd666 1 month ago
@demnlordd666 also what is the concept w/ salting the sol? I have heard of it before but college chem was 10yrs ago. more recently I read that you can recover isopropanol from an aq. sol. by salting, but it did not separate out into layers, does it just break the azeotrope and allow the lighter alcohol to distill? so ya Q's on 1) salting concept, 2) desiccant in sol. or no
demnlordd666 1 month ago
@zhmapper - Do you do the distillation with the NaCl or the CaCl2 in the distillation flask? Hydrate formation is reversible so you should remove it before you distil. Also at 3:24, your sulphuric anhydride is missing 2 hydrogens and your sulphur is haptavalent, not possible under normal conditions, one of the oxygens on each sulphur should be a hydroxyl instead. You've also done the same thing to your nitric anhydride; pentavalent nitrogen is impossible I'm afraid.
MrSmudger687 2 weeks ago
@MrSmudger687 - *heptavalent*
MrSmudger687 2 weeks ago
why did you flick the popsicle stick around sending acid every where? i would of let it burn itself out
jdflyback 1 month ago
Great video, excellent explanation and demonstration!
ytmachx 1 month ago
In the intro why are you pouring the blue stuff (probably CuSO4) into a vacuum filtering flask? Did you not have any other flasks ready?
99Chemicals 1 month ago in playlist Doug's Chemistry Lab 2012 Season
Great video, very well done.
spotlightman1234 1 month ago in playlist Doug's Chemistry Lab 2012 Season
frist view
iskatelikeanoob 1 month ago