That chart stops at 100% what a noob. Back to the lab with ya!
freezing point curves
Submitted 3 months ago by fossilesque@mander.xyz to science_memes@mander.xyz
https://mander.xyz/pictrs/image/55599cbe-8b51-4b81-a2c5-db8b51a97bd1.png
Comments
lemming741@lemmy.world 3 months ago
PenisDuckCuck9001@lemmynsfw.com 3 months ago
Because 100% concentration is for noobs
Someonelol@lemmy.dbzer0.com 3 months ago
It could get a lot messier. Adding in a third variable of pressure would’ve made the measurements so much harder.
Kowowow@lemmy.ca 3 months ago
Would be interesting to use pressure to keep the curve as stable as possible
flambonkscious@sh.itjust.works 3 months ago
The graph for that would be wild, presumably. Wouldn’t the axes have to be extremely inconsistent?
Evil_Shrubbery@lemm.ee 3 months ago
Yeah, all the pretenders and management saying if you can’t show it in extreme simplistic elegance you obviously don’t understand it enough. Eat shit.
… what Im saying is that I would just make up my own pretty curve, the scientific community would disagree but the public would accept it & grants would roll my way easier.
ramble81@lemm.ee 3 months ago
Especially that bump right around 42%. You know they retested that multiple times with a “wtf is going on?”
Evil_Shrubbery@lemm.ee 3 months ago
Not only that - you know they still got a bunch of “ok, but are you sure you measured it right” questions even after explaining it all in the paper.
Notyou@sopuli.xyz 3 months ago
I remember the first time I saw Newtonian fluids in video. I feel like my brain broke. How much more science have I been taught inaccurately?
The real world is crazy weird. This multiple freezing points post is also fucking me up too.
Eheran@lemmy.world 3 months ago
Newtonian fluids are just normal fluids, like water. The so not change their viscosity under sheer stress. I assume you mean non-newtonian fluids.
MataVatnik@lemmy.world 3 months ago
Me at my job right now. Apparently titrations and loss on ignition is some of the hardest shit to ever do in science
humbletightband@lemmy.dbzer0.com 3 months ago
Titration is hard, I agree. But blowing glass with a custom glass composition is way harder imo
MataVatnik@lemmy.world 3 months ago
The thing is these are established methods with clear instructions but I can get the right numbers for whatever reason it’s really making me question if I’m even a chemist. Blowing glass, now that sounds pretty fucking hard actually
Admetus@sopuli.xyz 3 months ago
Chemistry and Physics combined make very interesting ‘resonances’ in molecular behaviour. That’s as educated a guess I may make.
BreadOven@lemmy.world 3 months ago
Wait until you see phase diagrams for liquids, not to mention liquids with different concentrations.
Or freezing and types of ice formed.
arandomthought@sh.itjust.works 3 months ago
Dare someone smarter than me explain what the ever loving fuck is going on there?
skillissuer@discuss.tchncs.de 3 months ago
This is what happens when some kind of new compound is formed between these two, here it’ll be series of sulfuric acid-water complexes. Same thing happens with metals when intermetallic compounds form
skillissuer@discuss.tchncs.de 3 months ago
Here is a more complete chart …stackexchange.com/…/details-of-what-actually-hap…
Ravi@feddit.org 3 months ago
My uneducated understanding is that the chart shows at which temperatures sulfuric acid freezes depending on the concentration. Also in my very basic understanding of physics and chemistry I would have thought that it’s linear or exponential or something predictable and not that jumpy.
skillissuer@discuss.tchncs.de 3 months ago
In normal cases you’d see two curves going away from pure compounds downwards to a common minimum, which is eutectic point
marcos@lemmy.world 3 months ago
Here’s what a normal curve looks like:
i2.wp.com/…/Brine-Pro-salinity-chart.png
phdepressed@sh.itjust.works 3 months ago
Sulfuric acid and water has various H2SO4 and H2O ratios. So like 1 H2SO4 and 6, 3, 2, or 1 H2O it also has just the H2SO4 and H2S2O7. These are present as local points within solutions and with different prominence depending on the amount of water added. These 8 different ratios each have different freezing points.
TheSlad@sh.itjust.works 3 months ago
If I had to guess, I would assume that there are different molecular lattices that sulfuric acid and water can form at different concentrations and that these different lattices have different freezing points. I will now go look it up.
skillissuer@discuss.tchncs.de 3 months ago
What you’re describing are different crystalline phases of pure compounds, but this does not give you new minima, you need some new compound to form for that
Gladaed@feddit.org 3 months ago
Physics.