Whether Briggs and Rauscher actually sat down and conceived this or if it was a serendipitous discovery, this reaction is so damn bizarre and complex. I'm stunned they came across this.
You know that you are doing something right when people like myself (no possible way to perform any of this) are 3 hours deep into your back catalog. Well done. Beautiful camera work and a high quality of production are icing on the cake.
During high school I used this video as a reference for my final paper about the influence of starch on the Briggs-Rauscher reaction, besides being a visual indicator. We got a 9/10. Thank you very much for this vid!
I remember seeing this reaction for the first time at a field trip to the university. I was around 8 years old, and couldn't stop thinking about it. "What if you dipped a t-shirt in the fluid? Would the reaction continue forever, creating a color changing shirt?" I asked myself for several weeks.
Best demo of the Briggs-Rauscher I have ever seen, with bonus clean up procedures too. I'd buy one of your beakers except they probably don't work in Australia because the hole is on the wrong end for use in the southern hemisphere. ;-)
How about making a doomsday chemical series. Such as a few episodes to making antiseptics and maybe a few others to make antibiotics and so on. And maybe another few to make useful chemicals you think would be good in a doomsday situation.
You only added 5 ml of acid to the liter of solution A. Considering the color of the starting sulfuric acid, it's hard to claim that the color of solution A is entirely due to the acid. A more likely candidate is that your potassium iodate is contaminated with iodide. Under acidic conditions, the iodide and iodate react to form iodine, which dissolves and gives a brownish color. This is also why the color disappears with solution B: the iodine and malonic acid react to form iodomalonate, which is colorless. This side reaction contaminating solution A is why potassium bromate is more common for this oscillating reaction.
This is my favorite channel on RUclips; the reactions, synthesis reactions and everything else is so interesting to watch keep up the good work and keep inspiring people to love chemistry
Hi this is a very late reply, i am doing a school project about this, so instead of concentrated sulfuric acid can I use dilute sulfuric acid for solution A?
Probably similar with as with gravy mix. Ever tried to boil the water first an throw in gravy mix? Don't. It'll never dissolve and you'll have the worst clumpy gravy ever. The water _needs_ to be room temp or less.
Best video ever. My science teacher asked me to demonstrate a science experiment at school at an event, he specially asked me to find some very cool reaction to blow the minds off of other school's principals who are also going to be present there. Best demonstration and explanation that too in just 18 minutes. Wish me luck for the demonstration!
I had no success with acetone either. It looks like malonic acid is really necessary for best results. Unfortunately, malonic acid is a bit expensive and is not everywhere easy to purchase. So, I think it would be great to have a video on the synthesis of malonic acid.
I got very lucky and managed to snag some on ebay for cheap. The prep of malonic acid is not very economical to do at home. Also, you need NaCN for the typical synth, which is harder to get than malonic acid
Tali-bahn I'm not a professional but i'd still not recommend making sodiumcyanide. It's simply not worth risking getting yourself poisoned for something used in metallurgy and making nitriles.
Hello! I've heard some chatter that malonic acid could be made by oxidizing malic acid with bleach, both of which are readily available for cheap. If you would investigate that, it would be great. :)
NileRed You could grow a crystal copy of the playbutton, w/ copper or iron sulfate. Would be nice to see, but probably also rather difficult to get such a growth mold. You wouldn't copy, and use chemistry for it though. :)
This is a seriously great video! I was familiar with the iodine clock reaction from college but this one is much more interesting. Thank you so much for all the work in outlining the different chemical mechanisms at work. Wonderful job!
It's so pretty, like Van Gogh's Starry Night and Starry Night Over The Rhône! I was able to follow the explanation of the chemical reactions, though I had never encountered radical and non-radical as terms or reactions before. I was gratified to notice that I had guessed right about what would be causing the color change at the beginning of the video. I do kinda wish you'd mentioned the changing light wavelengths though. That must also be an interesting chart! Thank you for setting the solutions up in other beakers at the end! At the last showing, the color in the beakers must have oscillated differently because of the pattern the peroxide solution fell into the other and the patterning remained? It was nice to see those differences side-by-side. The furthest left looked like shibori, though I noticed that the clear bands were tinged slightly at their edge yellow. I wonder how the solutions were mixing to cause such clear banding?! And how they move to get to that point to allow it?! Cheers, C
Brilliant explanation! I have read about this reaction before, but it was hard to follow exactly. but now i definitely have a better understanding of how this works.
I'm curious about the reaction frequency, I expected it to be constant but from the last 4 beaker experiment it looks like some beakers cycle faster than the others. Does it depend on volumes of ABC? or on proportions (I don't think you're pouring exactly 1:1:1 ratios)? Very interesting reaction though, and thank you for the non stirred experiment :3 It was exactly what I was hoping for!
+NileRed Love your videos! Some suggestions I have: * thiocyanate (turns blood red in the presence of iron (III) ions and blue in the presence of cobalt (II) ions) * chemical chameleon (manganese oxidation state demonstration, although might be a little cliché) * total synthesis of chlorophyll a
The Briggs-Rauscher looks to be extremally similar to Belousov-Zhabotinsky reaction. Both also use commonly malonic acid, which I do not know why it is the case. The are also both autocatalitic in both competing reactions. The other details are really mostly accidental, like which indicator to use, or which metal catalyst to use. The difference between using bromine vs iodine, also looks very small. The key understanding is analysis of the kinetics of individual sub-reactions, which can be done quite easily using computer and differential equations. The most important part is the use of catalyst too. Despite a lot of progress in last 50 years, and pretty good understanding experimentally and mathematically what is going on, I feel the oscillating reactions and non equilibrium thermodynamics and non linear kinetics, didn't really progress that much.
It's possible that Bill Smathers is correct about the iodide, but I want to add an additional note about coloring in solution A. I've found that most discoloration in acid solutions comes from dissolved metal contamination. It's possible that combining it with the malonic acid produces colorless metal-malonate complexes. Or maybe I'm overthinking this.
If you follow cooking tutorials, you should heat the water first, then take some out, mix the cornstarch with it, and pour it back in, continuing to stir until it thickens slightly. It should be relatively colorless.
Every time i hear "tri-iodide" i think back to ehen my high school chemistry teacher blew up his fume hood with a bit too much ammonia and iodine flakes.
My AP Chemistry teacher would do this demonstration every Halloween. He'd tell a story and draw a jack o'lantern face on the beaker in which the reaction was conducted. It would turn orange, like a normal pumpkin, and then dark blue (which looks like black, making the black sharpie drawing on the side disappear), and then back to orange. And he timed it exactly so the color changes would coincide with his story. I'm sure that this took several days of tweaking to make it so predictable that he could practise the story and get his speed matched with the reaction. Also, he managed to prolongue the orange phase of the reaction for WAY longer than is demonstrated here...something like 20-30 seconds. So I guess there's a way to inhibit the formation of the tri-iodide ion for awhile.
When u add solution B the concentrate decreases which means the yellow color becomes less obvious,and also u can see the color changes back to a yellow-ish color and it becomes visible in a certain concentration when u add solution C…
love your videos! I just wonder why sometimes the color changes up from the bottom and sometimes down from the top - Very evident in example with 4 beakers
someone's probably already said this but when i make starch solution i bring DI up to a boil first, take the starch and some DI water and make a paste in like a weigh boat, then slowly add the starch paste to the boil DI water while sturring. You get a really clear solution this way. Until it crashes out after a few days.
Great video I do love this reaction. Just a suggestion maybe over long reactions like this you could play some royalty free music. Something calming? Just a thought
Wow so beautiful! Something like this would make a kickass lava lamp :) Is there a reaction similar to this where you seal it, and add energy to make it continuous?
It also works in a petri dish :D Your discovery of the changing reaction rates with exposure to air is very similar to BZ. With the BZ reaction, the bromine evaporates, so maybe iodine is doing the same thing here?
This is off-topic but this channel seems like a good place to ask this, since many chemistry enthusiasts are here: What substances in the chemist's arsenal are effective in removing black mildew from RTV silicone (the acetate type) ? Sodium Hypochlorite seems to be the popular choice, but what other professional chemicals might be even more effective?
The precipitate in starch solution is most likely the anti-caking agent (silica - ground sand). Same with table salt. If you try to dissolve it, you'll see insoluble powder.
I grow orchids and I've seen all these color changes in some of them. I fertilized too much and with city water. Thanks. Now I have to figure it out and maybe receive one of those science awards for genius.
I'd like to see this done in a petri dish, too, like the BZ reaction. Put the A and B solutions in, then drops of C at different points. I've seen this reaction in layers before, similar to those shown in the leftmost beaker around 15:00. In San Francisco in the 80s, the Exploratorium (when it was still at the Palace of Fine Arts) had a machine that would demonstrate it. It had reservoirs of the solutions and buttons to measure and pour amounts into a small container. Sometimes the valve for C would only open partially, so it went in slowly and didn't mix well. Most of it apparently stayed near the top, so that distinct thin waves of the reaction moved from top to bottom.
The amylose fraction retrograded as the starch paste cooled down. Cooking the starch without high shear and at elevated pressure to get the boiling point up around 230F isn't sufficient to disrupt the amylose fraction of the starch so that it crystallizes as it cools to room temp. If you use potato starch, available at any super market, your paste will not have amylose retrogradation.
Lol, You are the Chem Champion Bro, I must admit, Wow! Its amazing how you can get the stir chalk to spin for that long. Straight goods Chem Champion! Your explanation beat many Chem teachers out there too. Thanks! And Cheers. Easy effort. Work Safe and Smart Not Not at all. Lol. Right on.
I have no training in chemistry and very little training in science. While I can't be sure I understood this explanation, I think I understood it, at least in part. Overall, I'd say you did a good job explaining. Good enough that I subscribed at least. Though I'm used to getting all of this in an English accent from Periodic videos.
Whether Briggs and Rauscher actually sat down and conceived this or if it was a serendipitous discovery, this reaction is so damn bizarre and complex. I'm stunned they came across this.
I believe they actually sat down and tried. There was a lot of info on related reactions already though. They didn't just pull it from thin air
That's just....wow.
@@KakashiBallZ Kakashi change your profile picture your eyes are fixed
@@KakashiBallZ kakashi is stupid
@@NileRedWe stand on the shoulders of giants
You know that you are doing something right when people like myself (no possible way to perform any of this) are 3 hours deep into your back catalog. Well done. Beautiful camera work and a high quality of production are icing on the cake.
Mike O'Barr a lot of people do it in AP chemistry
Mike O'Barr in highschool
I did it in my personal lab freaked my sisters kids plum out 😂
@@ronaldbrown9638 lol
I agree well well presented you're very clear speaker just don't talk down to people
The ultimate “BUT WAIT THERE’S MORE!”
During high school I used this video as a reference for my final paper about the influence of starch on the Briggs-Rauscher reaction, besides being a visual indicator. We got a 9/10. Thank you very much for this vid!
I remember seeing this reaction for the first time at a field trip to the university. I was around 8 years old, and couldn't stop thinking about it. "What if you dipped a t-shirt in the fluid? Would the reaction continue forever, creating a color changing shirt?" I asked myself for several weeks.
Best demo of the Briggs-Rauscher I have ever seen, with bonus clean up procedures too.
I'd buy one of your beakers except they probably don't work in Australia because the hole is on the wrong end for use in the southern hemisphere. ;-)
thats a myth I believe xD. The thing about the vortex direction
It's the fox! but australia is upside down. he needs the hole on our bottom.... that sounded horrible... ima go n rethink my life choices.
There's definitely a market for Australian beakers. I'd like one for keeping helium in. It keeps getting out of my American beakers.
@chu Harry Are you trying to get an r/whooosh? Because that's how you get an r/whooosh.
@chu Harry r/woooosh
How about making a doomsday chemical series. Such as a few episodes to making antiseptics and maybe a few others to make antibiotics and so on. And maybe another few to make useful chemicals you think would be good in a doomsday situation.
This is a great idea
I would really like to see that too 😊
Mr Rishi The Cookie You predicted North Korea.
YES
Strike in 3 2 1
You only added 5 ml of acid to the liter of solution A. Considering the color of the starting sulfuric acid, it's hard to claim that the color of solution A is entirely due to the acid.
A more likely candidate is that your potassium iodate is contaminated with iodide. Under acidic conditions, the iodide and iodate react to form iodine, which dissolves and gives a brownish color. This is also why the color disappears with solution B: the iodine and malonic acid react to form iodomalonate, which is colorless. This side reaction contaminating solution A is why potassium bromate is more common for this oscillating reaction.
Very good point! That is also guaranteed the answer.
I added a note to the description. Thanks for your input
No problem!
This is my favorite channel on RUclips; the reactions, synthesis reactions and everything else is so interesting to watch keep up the good work and keep inspiring people to love chemistry
Hi this is a very late reply, i am doing a school project about this, so instead of concentrated sulfuric acid can I use dilute sulfuric acid for solution A?
Just a cooking tip for corn starch: make sure to always use cold water when dissolving it. It works better for some reason.
Probably similar with as with gravy mix. Ever tried to boil the water first an throw in gravy mix? Don't. It'll never dissolve and you'll have the worst clumpy gravy ever. The water _needs_ to be room temp or less.
Best video ever. My science teacher asked me to demonstrate a science experiment at school at an event, he specially asked me to find some very cool reaction to blow the minds off of other school's principals who are also going to be present there. Best demonstration and explanation that too in just 18 minutes. Wish me luck for the demonstration!
The shot of the 4 beakers side by side with slight delay was genius! Keep up the great work!
normally I hate youtube reaction videos but this is a clear exception. (wait, now it's black... no it's clear again)
14:16
when you're 10 and discover the powerpoint slide transitions for the first time
I had no success with acetone either. It looks like malonic acid is really necessary for best results. Unfortunately, malonic acid is a bit expensive and is not everywhere easy to purchase. So, I think it would be great to have a video on the synthesis of malonic acid.
I got very lucky and managed to snag some on ebay for cheap. The prep of malonic acid is not very economical to do at home. Also, you need NaCN for the typical synth, which is harder to get than malonic acid
NileRed I think nurd rage made a Video on NaCN starting from urea.
Tali-bahn I'm not a professional but i'd still not recommend making sodiumcyanide. It's simply not worth risking getting yourself poisoned for something used in metallurgy and making nitriles.
Hello! I've heard some chatter that malonic acid could be made by oxidizing malic acid with bleach, both of which are readily available for cheap. If you would investigate that, it would be great. :)
It isn't difficult to buy in my area. A lot of plastics, polyesters, and resins can be made with it.
The sudden dip from the gold to the dark dark blue really captivated me. It reminds me of the day to night cycle.
Congrats on the silver Play button.
But I bet you could have made your own... like Cody. :)
I could, but I dont want to copy :). I am thinking of something cool to do as a 100k special
NileRed You could grow a crystal copy of the playbutton, w/ copper or iron sulfate. Would be nice to see, but probably also rather difficult to get such a growth mold. You wouldn't copy, and use chemistry for it though. :)
I think something like Alum would be neater to grow, if only because it would be translucent.
@@NileRed Make something with thermite
And now he's at 3 million subscribers! Time flies by.
Finally I find the Briggs-Rauscher reaction explanation, lot of thanks tou you NileRed
This is a seriously great video! I was familiar with the iodine clock reaction from college but this one is much more interesting. Thank you so much for all the work in outlining the different chemical mechanisms at work. Wonderful job!
I am glad you liked it!
I don't know why RUclips recommended this but it was the best 18 minutes of video I've watched in a very long time. Absolutely fascinating. Thank you.
These videos massage all the science-nerd pleasure centers of my brain. Subscribed.
Thanks so much! This is by far the best explanation I found in an entire day of research on this topic
0:49 At that point in time he didn't know it would become his later profile picture...
Thanks for this video, your videos are oddly satisfying!
No problem
oddly satisfying videos for chemists x)
NileRed please do continue making such awesome videos. You explain chemistry in a very neat, organized and simple manner. Great job!
It's so pretty, like Van Gogh's Starry Night and Starry Night Over The Rhône! I was able to follow the explanation of the chemical reactions, though I had never encountered radical and non-radical as terms or reactions before.
I was gratified to notice that I had guessed right about what would be causing the color change at the beginning of the video.
I do kinda wish you'd mentioned the changing light wavelengths though. That must also be an interesting chart!
Thank you for setting the solutions up in other beakers at the end! At the last showing, the color in the beakers must have oscillated differently because of the pattern the peroxide solution fell into the other and the patterning remained? It was nice to see those differences side-by-side. The furthest left looked like shibori, though I noticed that the clear bands were tinged slightly at their edge yellow. I wonder how the solutions were mixing to cause such clear banding?! And how they move to get to that point to allow it?!
Cheers, C
It's good to look back and realise how far Nile has come without becoming a reaction channel.
I mean, he technically makes content out of reactions
Brilliant explanation! I have read about this reaction before, but it was hard to follow exactly. but now i definitely have a better understanding of how this works.
chemistry is mental :)
also, I love the explanation of the cleanup process, it's always at the front of my mind when I watch chem vids
I’m not sure why but your videos are oddly satisfying to watch. This one is pretty darn cool on top of that!
Pretty amazing. I wonder what the reaction would look like in a wide shallow container, such as a cookie sheet.
I am in love with oscillating reactions since school 🥰 they are so mezmerising to watch. I love it when reactions look beautiful. 😅
15:14 The aurora borealis in the first beaker
These videos are utterly fascinating...
For some reason that remind me the vanadium oxidation reaction, one of the most colorful and unique reaction i ever saw.
Vanadium blue is such a nice color. Wist it were more permanent.
This helped me understand my college chemistry class lab which did this reaction. Thank you nile!!!!
Very nice. My student did this as a demo and it absolutely stuns the crowd as well as a good learning moment for radicals.
14:19 I'm slowly getting more and more hypnotized to watch all Nile's videos
I don’t understand anything about anything you’re explaining but for some reason I’ve been addicted to your videos 🌟👌🏼
Would be pretty cool to see the change with a high speed camera.
That.. was amazing!! I’ve never seen the reaction when it wasn’t being stirred! 🙌
the production of oxygen gas at the bottom is what is stiring it, in the larger becher, the effect of the convection was smaller
also the reaction in the first becher when you have 4 running is amazing
You have a great voice, very sovereign. I actually can't watch a single chemplayer video for the audio reasons. Oh and you explain stuff really well
Thanks! Yeah that is unfortunate about chemplayer. If they used a real voice im sure a lot more people would watch
I'm curious about the reaction frequency, I expected it to be constant but from the last 4 beaker experiment it looks like some beakers cycle faster than the others. Does it depend on volumes of ABC? or on proportions (I don't think you're pouring exactly 1:1:1 ratios)?
Very interesting reaction though, and thank you for the non stirred experiment :3 It was exactly what I was hoping for!
+NileRed Love your videos! Some suggestions I have:
* thiocyanate (turns blood red in the presence of iron (III) ions and blue in the presence of cobalt (II) ions)
* chemical chameleon (manganese oxidation state demonstration, although might be a little cliché)
* total synthesis of chlorophyll a
The Briggs-Rauscher looks to be extremally similar to Belousov-Zhabotinsky reaction. Both also use commonly malonic acid, which I do not know why it is the case. The are also both autocatalitic in both competing reactions. The other details are really mostly accidental, like which indicator to use, or which metal catalyst to use. The difference between using bromine vs iodine, also looks very small.
The key understanding is analysis of the kinetics of individual sub-reactions, which can be done quite easily using computer and differential equations.
The most important part is the use of catalyst too.
Despite a lot of progress in last 50 years, and pretty good understanding experimentally and mathematically what is going on, I feel the oscillating reactions and non equilibrium thermodynamics and non linear kinetics, didn't really progress that much.
Pure art, this looks beautifull!
It's possible that Bill Smathers is correct about the iodide, but I want to add an additional note about coloring in solution A. I've found that most discoloration in acid solutions comes from dissolved metal contamination. It's possible that combining it with the malonic acid produces colorless metal-malonate complexes. Or maybe I'm overthinking this.
Been trying to get my organic chemistry professor to let us do this.
It's really nice of you to also include the cleanup afterwards (precautions to disposing)!
They could have used this as a movie trick in Star Trek and could have been one of guinins magic drinks
If you follow cooking tutorials, you should heat the water first, then take some out, mix the cornstarch with it, and pour it back in, continuing to stir until it thickens slightly. It should be relatively colorless.
Every time i hear "tri-iodide" i think back to ehen my high school chemistry teacher blew up his fume hood with a bit too much ammonia and iodine flakes.
NileRed
NurdRage
You need to do a collab called NR2
At least take it chemicaly:
2(NR)
or 2Nr if you do not like the brackets
NR^2 squared
@hypernova N-R-N-R'
YES CALL IT THE AMINO GANG
this is awesome, and your are videos too, I love them
My AP Chemistry teacher would do this demonstration every Halloween. He'd tell a story and draw a jack o'lantern face on the beaker in which the reaction was conducted. It would turn orange, like a normal pumpkin, and then dark blue (which looks like black, making the black sharpie drawing on the side disappear), and then back to orange. And he timed it exactly so the color changes would coincide with his story. I'm sure that this took several days of tweaking to make it so predictable that he could practise the story and get his speed matched with the reaction. Also, he managed to prolongue the orange phase of the reaction for WAY longer than is demonstrated here...something like 20-30 seconds. So I guess there's a way to inhibit the formation of the tri-iodide ion for awhile.
That is amazing!
Wow.
This is literally the best video I've ever seen
It does look better without stirring! Very nicely explained too! :)
Really, REALLY good explanation. Loved the video
These perpetually color-changing liquid videos are cool.
When u add solution B the concentrate decreases which means the yellow color becomes less obvious,and also u can see the color changes back to a yellow-ish color and it becomes visible in a certain concentration when u add solution C…
love your videos! I just wonder why sometimes the color changes up from the bottom and sometimes down from the top - Very evident in example with 4 beakers
If you make the solution more viscous, I wonder if that might make the reaction propagate more slowly and create an even more striking effect.
someone's probably already said this but when i make starch solution i bring DI up to a boil first, take the starch and some DI water and make a paste in like a weigh boat, then slowly add the starch paste to the boil DI water while sturring. You get a really clear solution this way. Until it crashes out after a few days.
One of the best reactions in chemistry. The theory behind it is very interesting!
Wow, not seen that before, quite beautiful! 👍
It is the first time I feel that Chemistry can be so much fun after I know about the oscillating process.
Great video I do love this reaction. Just a suggestion maybe over long reactions like this you could play some royalty free music. Something calming? Just a thought
You're my new Favourite RUclipsr.
Very well explained thanks!!!
Wow so beautiful! Something like this would make a kickass lava lamp :) Is there a reaction similar to this where you seal it, and add energy to make it continuous?
So interesting! Thanks for the video!
I love this guy, he always helps me fall asleep!
can you pls make a video on lassaign's extract and its test ?? that will be a great deal of help for me in my high school
pls
idk but i love me some lasagna extract
Fuckin', I thought you were trying to say "Lasagna".
It also works in a petri dish :D Your discovery of the changing reaction rates with exposure to air is very similar to BZ. With the BZ reaction, the bromine evaporates, so maybe iodine is doing the same thing here?
excelent video!! thanks for the explanation
Hey Nile, I'd love to see a synthesis of the compound Geosmin. It's that earthy smell after it rains
You make me wish that I had paid more attention to my 10th grade 'intro to chemistry' class. Very cool videos!
If you were to take a spoonful of it while it's black, would the reaction carry on in that spoon?
Incredibly beautiful!!
I showed my wife and she said " it changes colour a few times but WHAT THE FUCK IS THAT LITTLE SPINNING WHITE THING!!??"
magnet, for stirring.
there is another spinning magnet under the paper. so it spins around.
14:09 is still the best footage this channel has ever gotten. Not a criticism!
This is off-topic but this channel seems like a good place to ask this, since many chemistry enthusiasts are here:
What substances in the chemist's arsenal are effective in removing black mildew from RTV silicone (the acetate type) ?
Sodium Hypochlorite seems to be the popular choice, but what other professional chemicals might be even more effective?
The precipitate in starch solution is most likely the anti-caking agent (silica - ground sand). Same with table salt. If you try to dissolve it, you'll see insoluble powder.
I grow orchids and I've seen all these color changes in some of them. I fertilized too much and with city water. Thanks. Now I have to figure it out and maybe receive one of those science awards for genius.
I'd like to see this done in a petri dish, too, like the BZ reaction. Put the A and B solutions in, then drops of C at different points.
I've seen this reaction in layers before, similar to those shown in the leftmost beaker around 15:00. In San Francisco in the 80s, the Exploratorium (when it was still at the Palace of Fine Arts) had a machine that would demonstrate it. It had reservoirs of the solutions and buttons to measure and pour amounts into a small container. Sometimes the valve for C would only open partially, so it went in slowly and didn't mix well. Most of it apparently stayed near the top, so that distinct thin waves of the reaction moved from top to bottom.
awesome as always , good job mate
thanks for detailed info, great job, cong
The amylose fraction retrograded as the starch paste cooled down. Cooking the starch without high shear and at elevated pressure to get the boiling point up around 230F isn't sufficient to disrupt the amylose fraction of the starch so that it crystallizes as it cools to room temp. If you use potato starch, available at any super market, your paste will not have amylose retrogradation.
Lol, You are the Chem Champion Bro, I must admit, Wow! Its amazing how you can get the stir chalk to spin for that long. Straight goods Chem Champion! Your explanation beat many Chem teachers out there too. Thanks! And Cheers. Easy effort. Work Safe and Smart Not Not at all. Lol. Right on.
The author of spanish subtitles is Nate Higgers... normally I'm not one to formulate bad thoughts but that name seems unusual to say the least...
"My sulfuric acid got a little dirty..."
As it does.... 😊
This is a very interesting video. I like how you easily describe it.
Thanks!
Something I dont seem to understand is why we have to mix A and B together before adding C? What products are formed if we add B and C first?
Dark, darker yet darker
photon readings negative. This next experiment seems very, very interesting
What a beautiful song 😵😵😵😵😵!!!!!
I have no idea what you are talking about as I never study chemical. But it is fascinating af
I have no training in chemistry and very little training in science. While I can't be sure I understood this explanation, I think I understood it, at least in part.
Overall, I'd say you did a good job explaining. Good enough that I subscribed at least. Though I'm used to getting all of this in an English accent from Periodic videos.
Any word on when youll have the beaker mugs back in stock? My wife is a chemist and I would like to get her one for work.
Beautifully explained
thanks!
Oh yes... oh yes.... please do do The Belousov-Zhabotinsky Reaction!