Chemistry experiment 28 - Iodine clock reaction
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- Опубликовано: 17 окт 2024
- Famous iodine clock reaction: oxidation of potassium iodide by hydrogen peroxide.
Mixture A:
10 mL 2.0 M sulphuric acid
10 mL 3% hydrogen peroxide
80 mL water
Mixture B:
Solution of 0.04 g sodium thiosulfate pentahydrate in 20 mL water
Solution of 0.9 g potassium iodide in 5 mL water
4 mL starch solution
71 mL water
came from the how fast my mood can change lmao
Same lmao
Same hahaha
Same
Swearcasm??
Same
That's amazing, the fact the clear mixture turns into a sudden dark blue! :) love the reaction
“This video has no sound “
*Turns up volume*
lmaooooo . same dude.same.
Came here from Twitter
Thanks @anchetapatty from Twitter lmao
Sameeeeeeee
Same 😂😂😂
Same
Hella same
Sad how I could have been doing this in class if there wasn't COVID-19
Where do you even get all this stuff? Walmart?
Yea, just go into the sodium thiosulfate pentahydrate isle.
Sure? You can probably get sodium thiosulfate in pool supplies, the in-store pharmacy should sell potassium iodide, you can get liquid starch in the laundry section, sulfuric acid is the main component of acidic drain cleaners, and hydrogen peroxide can be found in the beauty section. None of this is particulary exotic.
Or you can buy the pure lab-grade chemicals from a supplier like Sigma-Aldrich.
No Name its a joke?
Another place you can get the sodium thiosulfate in smaller quantities is the fish care aisle. Look for water conditioners.
You can also get it from Flinn Scientific. Just put in any of these chemicals and you can buy some!
Why everyone here from twitter when I'm here for my Chemistry revision
holy shit that is some amazing glassware, so precise
Here from instagram ?
Yup
no
Judith Okoro twitter
Pennsylvania.
A similar thing happens if you mix medical iodine, vitamin C in water, white vinegar, starch and hydrogen peroxide.
i wish i hade come from insta but i have to write my lab and i dunno how fckmylife
Loll same
Can I subsitute the potassium Iodide with sodium Iodide? And the sulfuric acid with sodium hydrogen sulfate (Sodium bisulfate) ? If I can't use NaHSO4, it's fine, because I am just saving my H2SO4 for a big project.
Cough cough never pour water into acid
Why
Because if you spill water into acid and a few drops will jump out of the solution it would be dangerous due to its high concentration
start with water, pour acid in water, confirmed. Never do the opposite, exothermic reactions can produce instaboiling mixtures and you would get burnt. But 2M H2SO4 is quite weak as a concentration, so no biggie here.
Water to acid -----reacts like a bastard. Acid to water --- like you oughter.
Combien de temps là réactions chimiques dure ? Est-ce que la couleur reste transparente ou alors devient-elle opaque ? Merci
I'm just wondering is there anyway you could produce a similar reaction using household substances?
Yeah bleach and something with ammonia will do this
@@yeahthisismyname5016 thanks
@@Cameron_Maguire what did he say ?
@@Dr-Garry This reaction reqiuires a strong acid, oxidizer, and thiosulfate. Yes you could use common hydrogen peroxide as the oxidizer, but most people don't have stuff like sulfuric acid lying around.
@@Dr-Garry NileRed has a video on that exact question.
I did this experiment for science day and i got 1st prize. Tnq very much
Hola qué tal? Estoy intentando hacerlo y el almidón que usa él es transparente, el que yo compré es blanco y queda horrible. Cómo lo hiciste tú? Gracias
Why is starch transparent? mine is white. What did you make or where did you buy it?
Hello, I was just wondering if I could use potassium thiosulphate instead of sodium thiosulphate?
Should we use distilled water
Is sodium thiosulfate pentahydrate essential for the experiment? I'm thinking of doing this experiment for my IA but I don't think we have it in our school
I used the same concentrations stated by you by i get red color instead of deep blue. Why would that be so?
so now we pour water into acids?
I repeated these instructions to the letter. (I used 12.5 mL of 1.6 M H2SO4 and I diluted 1 mL of 30%H2O2 to 10 mL but otherwise, exact). I mixed the solutions and ... nothing. After about 4-5 minutes of swirling I noticed the solution turn a light yellow. The color gradually turned a deep amber. The only point that might have introduced error was the vaguely-named "starch solution." Not knowing the precise composition, I made a small amount of solution from Aldrich's "Water soluble Starch" as a saturated solution in distilled water. Was this what was needed or was that my mistake? Have fun and good luck. My clock is still ticking.
Hola, cómo solucionaste el tema del almidón? Mi Almidón es blanco y queda horrible
Are these ingredients easily accessible?
What is the concentration of the starch solution?
1: wtf
2: how
3: why
4: what is spinning in there
2. that's what happens at equilibrium for this reaction3. idk, because it's cool maybe4. a magnetic stir rod
1. Lol
3. You need an equation for that
What is starch solution? Can anyone explain me
The way they diluted it to 100cm3 so easily omg
What happens if someone uses 35% hydrogen peroxide instead of 3%?
Sodium thiosulfate pentahydrate is the same as Na2S2O3?
Dilute the H2O2 10 to 1 first.
What sorcery is this???
i have a question. Are we making Iodine? why Is this called the Iodide lab is we never use Iodine, we only use Iodide?
Iodine is produced from H2O2 plus iodide
What is the concentration of the 0.04 g sodium thiosulfate pentahydrate?
0.01266 mol dm3 for 20 ml
At last wht should u mixed
Isn't it better to dilute by pouring in water first, then pouring in denser substances second? This will allow the acid and peroxide to mix with the water, and results in a more dilute solution.
Did he just trow water in acid? That’s pretty dangerous
The hydrogen peroxide should be treated like water too when it comes to acids of high molarity.
How is the mixture being swirled?
+Kevin Liang Stir bar obviously
+Kevin Liang There is a magnetic stir bar in the bottom of the flask. The hot plate has a magnetic centrifuge inside of it that spins the stir bar.
Notice how Heather got 8 likes and you got 0, Matt? That's because she answered his question politely, where you were a pretentious douche.
Who elese is here from i funny?
TFAY bruh lmao same
what
Me
Me lol
People still use that app? Lol
Are you sure this is real time?
Can you please name a catalyst to expedite the rate of reaction? I need before 19th Of March 2019
How many minutes do we have to wait for it to become black in color..?? Please if anybody can answer my question ..
It only takes a few seconds for a normal reaction. This reaction is highly sensitive to the concentration of the solutions (idk what the ratios are).
Levi Campbell the less vitamin C in the solution, the faster it will react
this is not the vitamin-c variation
HELP, question:
I'm looking for a reaction where you start with color (any color is ok) and after a certain time, it becomes colorless. If possible I would like to do it with non-harmful chemicals, because it's going to be an experiment for primary school kids.
-Start with a color (already set up in the container, if possible use non-harmful chemicals or natural products)
-Add H2O and it becomes colorless
-If possible, change the time it takes to become colorless based on the concentration of the initial chemicals/products
-Use natural products or non-harmful chemicals, as it is an experiment for kids, primary school students.
Thank you very much.
mabye adding iodine to vitamin c
there was no need to add a magnetic stir bar
why it take this name
or refer to what ?
Came here from Instagram 🤟🏼
How do you prepare the starch solution?
it’s just a lil starch (like potato or corn) with water
can i ask what is pentahydrate mean?
+Ng li quan It means the compound has 5 molecules of water
Does anyone know whats going on from 1:42 to 1:50?
Why we need to stir the mixture ?
IIRC it mixes the two solutions evenly so the reaction happens evenly, though I don't believe that mixing is necessary.
Really bad video. No sound, how did u mix it?
How Jesus probably turned “water” into “wine”.
When the expiration date kicks inn.
Everyone else in the comment came from somewhere else and I come for my chemsitry exam tomorrow lolll
Not the iodine thing I expected, but still cool!
I need chemical equation, can you send me?
en.m.wikipedia.org/wiki/Iodine_clock_reaction
i think this can help you... wiki always knows the answer😊
how do you make it transparent again?
It's not transparent "again"; it was put in replay - notice the bottom right-hand corner.
To make it transparent and blue reversibly, one should add the second solution DROPWISE to the first flask.
+Tsveti Spasova If you add more thiosulfate it will turn transparent again
Actually after a while it goes back to transparent
You need to add 50 gallons of water and mix, it will become transparent again.
How is the solution being mixed in the flask??😳 it looks like magic
It's an auto mixer, we have them at work. It's spun with magnets.
Takes about 30seconds to 1 min to see the colour change to happen
Guariscimi tutto a tutta roccapiemonte e zone vicine mi chiamo Biagio di balsamo ognuno per se
Came from Reddit !!!!
Who came here after the Veritasium video (since this reaction dates back to 1886 and not the 1950's)?
how long does it last?
All good, but that vortex in the solution is pretty longer than usual!! And you pour water in Acid¿!
So it really does change that fast, I had to watch multiple videos to verify 😅
When your black friend calls you my nigga
How fast my mood changes
Anyone wondering how the fuck this magician is stirring the mixture
very cool like 429
Fai maraman
Here from Instagram
Very good
We ar gowing toe riekrijeet tis ekspieriemend.
Came here from Tiktok
whos here from chemistry
me. chem 2 to be exact
Who came here after watching that vid from tiktok 🙊
*i blinked*
Anyone here from Imgur?
America explain
Here after anncy twinkles video
Here from home school google classroom
Who came here from insta😇
Anyone here from TikTok?
Guariscimi tutto anche l aids la lebbra i tumori la leucemia la sindrome psichiatrica e l aids oids e u mi chiamo Biagio di balsamo e famiglia
omg add acid to water
yo se q llegaste aca por flanchota ahre
Fammi un prelievo di sangue e poi mi guariscimi tutto mi chiamo Biagio di balsamo e famiglia.
Scioglimi le medicine gay sono Biagio di balsamo e fratelli Biagio di balsamo e famiglia
2:04
skip to 2:00
Mood
pretty ballsy pouring water into acid
me when i get the n word pass from my black friend
black magic
WHAT THE FUCK
Que feo lab
Nice, I got that 100th dislike