Manganese - Periodic Table of Videos
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- čas přidán 8. 03. 2015
- A new video on the element Manganese.
Reddit discussion: redd.it/2yhmrv
Featuring Sir Martyn Poliakoff and Dr Samantha Tang.
More chemistry at www.periodicvideos.com/
Follow us on Facebook at / periodicvideos
And on Twitter at / periodicvideos
From the School of Chemistry at The University of Nottingham: bit.ly/NottChem
Periodic Videos films are by video journalist Brady Haran: www.bradyharan.com/ - Věda a technologie
I like the phrasing of that... "Forgiven in the interest of science."
It is a great line, and he's lucky. I'm usually punished in the name of science.
Somebody should make a shirt out of that. Something along the lines of "Forgive me in the interest of science."
Josephiroth Nom nom babies.... "oh dont mind him... hes doing it for science".
Josephiroth FOR SCIENCE!!!!
It is like the Leroy Jenkens of the real world.
His parents might've forgiven him, but I bet his sister didn't.
*"Brringht grreen."* at 7:15
Poliakoff's cover has been blown, he is definitely Scottish.
You think so? The name Martyn Poliakoff sounds rather slavic to me...
derkateramabend Sir Martyn is of Russian descent, but I firmly believe that it's a cover.
*****
I happen to be from Sweden. The "grreen" sounded different and I just jumped to the first dialect I could think of when I wrote the comment. There's no real thought behind it.
Pixelmaniac I don't mean to hate on you like that Michael guy did but the prof's accent didn't change at all :') literally all he did was roll the R, also Scottish isn't a dialect it's an accent (semantics I know).
+Pixelmaniac He is in fact a Russian spy, working for Putin.
"And 5, if you're a mathematician, you will know is half of 10" This is some advanced math right here lol.
Actually, if 0 doesn't exist, half of 10 is 5.5
Haha I love when he gets so seriously sarcastic in a playful manner without barely cracking a smile.
pipnina Not true....zero is not a factor so is not relevant.
baarni Get 10 things, pick the middle one. 10 is an even number and there is no integer middle value when the value represents objects in a line.
pipnina yes correct. Therefore you cannot halve the sixth item to create 5.5 otherwise you would only have 4.5 things in the second half of your division as you originally stated.
Messed up hey...So to halve 10 items you can only have 2 groups of 5 with a divide in between....;-p
You just contradicted your first statement
"and if you're a mathematician you'll know that half of 10 is exactly 5". The professor cracks me up :D
***** In the name of science, forgive him!
Jeff H And in the interest of science, he was forgiven.
I bet you still remember it’s 5!! That’s why he did this to help you learn!!!!!
We had a joke in AP Chem back in high school about disguising a potassium permanganate solution as grape kool-aid by putting it in a pitcher in a refrigerator. A rule of thumb, we figured, is to never trust a chemist's fridge.
The brown manganese dioxide spots can easily be removed with vitamin C. Just use apple juice, an orange or just a vitamin C tablets to reduce MnO2 to Mn2+ and flush it well.
Where were you when he was 15??
"Manganese is actually a much more interesting metal than you might think."
...I had no preconceptions
I wish I had the "Forgiven in the interests of science" excuse when I was younger.
"Used a spoon and a gas stove."
This is a syringe away from being very dangerous.
Especially to items of clothes,
A Reddit discussion thread for this video: redd.it/2yhmrv
Make a video on Caesium Hydroxide! The strongest base.
It's a pity that you have gone to the dark side by using reddit, the cancer of CZcams and life in general.
(tips fedora and unsubs)
raven lord How thick can a person get?
zoey Quay He tipped his fedora. That already speaks to what kind of person he is.
uploaded on my birthday! :)
I am from the U.S. and i absolutely love your videos! I had always had an interest in Chemistry as a kid and these videos spark that interest alive again! Thank you guys for all that you do for science! P.S. Sir Martyn, I love your hair m8!
I don't have to watch the animese because I read the manganese.
your proteins are a polymer of anime acids
redtails excess anime acids are deanimated in the liver
japanese manganese
Ah, I see you are a fellow manganese of culture.
Where I grew up you could buy potassium permanganate crystals in the pharmacy without a prescription, to make light pink disinfecting wound washing rinses (weaker than bleach, you also could get tincture or iodine), but we as 9 year old kids would buy a packet of like 1 gram, and use the crystals to create artificial sneezes. You pick out a crystal and stick it in your nose, and it's an instant sneeze. I only did it like twice in my life, but some of my friends found it so interesting that they did it over and over and over and I'm like dude, you're messing up your mucuous lining like that, and creating permanent damage or something. Crazy!
We also used to shave match heads into a loud noise making device, made of two male screws screwed into a female one from the opposite side, and a piece of shopping bag tied around the end of one of them, which, when you throw it up in the air, becomes the tail as the screw contraption falls down, guaranteeing that it will hit the cement sidewalk tip first. So you unscrew one of the male screws, and shave some match heads into the chamber between the two screws, then screw it back on fairly tight, and throw it up in the air so when it lands it hits the cement floor. Booom!
Fun, fun fun!
We also stole calcium carbide from the welding generators at the nearby construction site, and put it in a wine bottle the alcoholic construction workers left empty around the construction site, with a cork, so you fill it with water, drop a piece of grey-brown carbide covered with white lime, and plug the cork, and 30 seconds later pop! it shoots it up into the air. I'm thinking H2O2 with a drop of MnO2 catalyst into it would also do it, unfortunately the reaction rate is too uncontrolled between MnO2 and H2O2, unless you use a small piece. MnO2 is also a great O2 generator catalyst when trying to get O2 out of KClO3 or KClO4, which, when heated, have a high decomposition temperature, or KClO3 actually turns into KClO4 without decomposition, but in the presence of a little MnO2 it comes out fast. MnO2 like PbO2 is also a great Cl2 generator from HCl, maybe from bleach too, and I think I read somewhere that cobalt gives you O2 from bleach while manganese and lead give Cl2. PbCl4 might exist at some low temperature and decomposes at something like 5C, I'd have to look it up, like chlorine hydrate is also stable at low temp. I don't know about MnCl4 if it's ever stable, but Mn2O7 exists for sure, and it's wild.
Thanks for all these tips!
Here I can get 100g of KMnO4 crystals over the counter for $10. Then I chuck some of it into glycerol from the baking store and watch the show
Brady I liked those types of videos since I first noticed your channels, but man, you have really stepped up with PeriodicVideos. It is so professional and detailed now, you just have to love it! :D
Thanks for making all of these fascinating videos!
Magnetic salts... wow! Never knew that. Chemistry is so amazing!
7:15 "Brrrrrright green"
Periodic Videos, I've been a long time subscriber, I love Professor Poliakoff! It's partly thanks to you that I started making my own science videos (in fact I uploaded my first videos only last week!) in the hopes that I can help more people become interested in learning about Science. And if anyone here is interested in watching other science-based videos, please give my channel a try! I strive to make my videos as visually appealing as possible, and as a grad student who is trying to put himself through school while also supporting his parents, your support and viewership would be much appreciated! Thank you guys :D
i was gonna skip past this comment cause it sounded like spam, but i actually looked at your videos and i love your intros
*sir, not professor. He was awarded the title quite a while ago
Greg Addams I know, but he had said himself that he prefers to be called professor by students :)
ScienceSid
As advice, you could make the intro into your video a bit shorter(or remove it completely), and stop using CAPS IN YOUR TITLES TO DRAG ATTENTION=)
"Forgiven in the interests of science"
a phrase I wish I heard more often
I love the very beginning of this video where hes shaking his hands "manganese" I dont know why but its kinda funny
I was just about to post exactly that comment.
Manganese is one of my personal favorite transition metals. It has many different colored salts, the colors can be easily changed through redox. Its oxides are strong enough oxidants to generate halogens (primarily what I use them for). KMnO4 makes spectacular pyrotechnic reactions with reducing agents as well. KMnO4 can also be converted to Mn2O7 with sulfuric acid. I've done so before and it is so reactive that it instantly ignites/detonates substances such as alcohols on contact.
The beginning of the video was not properly accompanied by sound, so I went back 10 seconds. Now I am stuck giggling and having fun, hearing him pronouncing "manganese!" in such a passionate way, over and over again 😂
So happy to see fresh element video :))
"5 if your a mathematician, is half of 10". HAHAHA!!
I wish, i had The Professor as my teacher in the college, i would have Earned a gold medal. His explanations are always easy to understand. Simple.
Can't get enough of these videos.
This was a much more interesting video than I thought going in. Thanks!
Great shots getting the different varieties of Mn dissolving in the liquids; those were truly terrific. You don't have to rack (DOF) focus in each video. It seems that you always make a point to do so.
A year ago I did some different experiment that also led to Potasiummanganate.
Whats intresting about K2MnO4 is that it gets oxidizied to KMnO4 very quickly while in contact with air (or oxidants) but can be stabilized as cristal water in KOH or NaOH that is used for the reaction.
As a man trained in wilderness survival, I've learned a way to start a fire by combining potassium permangenate and glycerin, unique energetic reaction highly useful in getting a fire going. Always keep both in my survival backpack.
i love how you wave your arms in the beginning, it gives you all the credibility in the world as a scientist in my opinion.
I love the roll on the r in “bright green”
Brrrigt green LOL :D
You guys should do a follow up video on electrons and their states and orbitals.
I think it might help the understanding of transition metals and why they're so special.
I love how he always persuades people to do experiments.
During WWII, the United States removed the nickel from the alloy used in it's five-cent "nickel" coins (Cu75/Ni25) to, supposedly, divert it to arms production. They replaced it with silver and manganese (Cu56/Ag35/Mn9). As an indicator of the alloy change, the placed very large mintmarks above Monticello (Thomas Jefferson's home) pictured on the reverse. The color of the alloy is strikingly different to anyone familiar with coins. It is speculated that the true reason for the change was public relations - demonstrating reallocation of resources for the war effort - in an attempt to encourage scrap collection, etc.
Thank you guys! I am in the 8th grade and we are just starting to learn about the elements! These videos really help me understand the material.
@Комендант Sixto goddannnggg thanks for replyin!
Yay! New video! I've been wondering when we would get another :)
Manganese: one of the best elements ever.
Thank you Prof for another great video!!
"Forgiven in the interest of Science". What a great line. =3
how the hell did he get his hands on this as a school boy even in the interests of science
I played with it when I was at school as well and I'm not as old as the Professor. Perhaps schools in England are more relaxed about this.
He probably bought it from his local chemist. Gotta remember that chemists weren't always just the place you went to to get medicine. Even today you can get all sorts of stuff from a proper chemist store.
It was a different time. People didn't keep their kids wrapped in Nerf in those days.
It has 5 d electrons in element form too so why isn't it magnetic in element form
Great another video i love learning this stuff!
I don't think enough people have commented on all of the wonderful accents on these videos, beautifully varied.
I remember using potassium manganate for showing convection currents in water
And diffusion in water lol
thanks prof for another great video
"I persuaded Sam"....wait that's not Neil.
I love manganese chemistry. I was hooked the first time I saw KMnO4 in water.
Hm, i don't get it. If metallic Mn has 5 d-electrons , which are unpaired, it should be also magnetic as metal.
Or do i miss something?
Manganese is not strictly in the middle of the transition metals, but it is one of the 2 yes, the other being Iron (as would be seen by a mathematician or more specifically a statistician). Idk why Manganese is more special than Iron, I am guessing it has got something to do with the half filled d-orbitals. Mn has all its d-orbitals half filled, but iron has one filled d-orbital.
Manganese is the central atom of chlorophyll. Iron has that position in haemoglobin. Almost identical molecules other than the central atom make normal blood and plant 'blood'.
Potassium permanganate is also used to make water safe to drink, so it's pretty and useful!
The ryme is if its pink its safe to drink
1:35 this is why we love the professor!
Keep up the great work and hope all is well
I will take payment of gold in solution up to 32 oz or 1 giant flask of helium worth upwards of 20,000.
Hi, great video.
I'm surprised the reaction of permanganate and glycerine wasn't mentioned. Reduce the permanganate crystals to a powder with a pestle and mortar and arrange in a pile (like a small hill). Drip some glycerine on top and it should start to catch fire, looking like a volcano! The permanganate is a powerful oxidant and the glycerine is the fuel.
Great video
Not every scientist can boast of such a sense of humor and the ability to create a positive attitude :)
It's interesting how the colours of the two compounds are on opposite sides of the colour wheel. Is thee any significance to that?
PhazonSouffle Just molecular crystal shapes, nothing more.
And karma.
These videos make me want to be a chemistry student so i can play with them
will magnesium in any way react with manganese?
pretty wild how manganese can change its colors, when out prospecting the purple color is usually an indicator of the presence of manganese..
this has to be one of the more interesting video series in youtube!
"forgiven in the interest of science."
Love that phrase
Weatherford Elementary School in Plano, Texas, USA was here!
One of my favourite minerals is rhodochrosite (and rhodonite), and both are gorgeous pink! I should mention they're both manganese carbonate (if I remember correctly). I'd love to see the professor with a sample of rhodochrosite from Sweet Home Mine, Colorado
Can you guys do a video on the PG5 molecule?
While on the topic of the transition metals, can someone explain why iron, cobalt and nickel are in the same electron group?
All through middle school, "Manganese" always sounded like some exotic nationality to me.
Can someone explain to me what is happening in the reaction of Manganese Dioxide and Hydrogen Peroxide? I have done it (and recommend that others do too - you can get Manganese Dioxide out of lantern batteries along with carbon rods) and cannot find a definitive answer as to why the reaction happens.
The effect of the MnO2 is purely catalytic. It causes the decomposition of the peroxide into water and oxygen. I've done it at home, too, about 60 years ago. I've used MnO (starting as MnCO3) as a catalyst in a reaction between acetic acid and decanoic acid to form methyl nonyl ketone, which smells quite nice. This was perfume chemistry.
When I was a kid 50 years ago, dentists used potassium permanganate solution as a mouthwash/rinse.
Put it KMnO4 on Magnesium and add a drip of Glycerin on it... *woshh* and then its snowing white particles (of Magnesiumoxide). That was the first experiment I did as a kid with my chemical model kit in my mom's kitchen. However I didn't leave brown spots either...
Manganese: the element that is misread as magnesium
In a standard D battery there is a copper electrode surrounded by manganese dioxide soaked in ammonium chloride solution.
I used to mix this manganese dioxide with aluminium powder and obtained a thermite reaction but didn’t see any manganese. I suspect it burned in the heat of the reaction.
Later I read this MnO2 mixture with aluminium could be explosive so I didn’t do it again. It wasn’t randomly thrown together, it was in stoichiometric proportions and even small quantities could be ignited with a blowtorch.
very educative. thank you regards,
"Which is BRRRRRRIGHT green". That must be really really bright!
I love how well labelled the MnSO4-vial is XD
You should do a video on the colours of vanadium!
Keep updating those elements!
My friend and I tried to make a firework incorporating potassium permanganate, thinking that we would get purple sparks. It was just a kid's chemistry set from "Toys by Roy" so we failed to get what we expected.
So if you dye a shirt with the green stuff and then squeeze a lemon on them will they turn bright purple?
How did you have access to these when you were that young?
That’s extremely interesting, magnetic salts!! Are there more and has anything come of it
What are the transition metals transitioning between ?
oh ok, thanks, I never knew that.
Una traducción perfecta si señor
Amazing
Can we make a potassium permanganate crystals by normal crystallization??
where did he get everything when he was that young?
Nice video!
isn't the transition metals excluding scandium and zinc, because they have to have incomplete d orbitals, or are there different definitions?
I thought so. A transition element is one that forms one or more ions with incomplete d-orbitals.
Best comment ever: I was forgiven for the purpose of science"
Manganese is one of my favourite elements although I like most of the common elements :)
what about the effect of manganese on the human body???
What is meant by "KMnO4 has no D elctrons"? A link would suffice if it is to complicated to explain in a comment. Thank you.
Years back when you could buy chemicals without being suspected of being a terrorist, i purchased potassium permanganate. Dropped about 500 grammes off powder on my kitchen floor. Thought it be a good idea to mop it up. My wife was fuming as it looked like someone had done a dirty protest on our new floor.
Why did you miss the chameleon experiment???
Do videos on electromagnetics
***** Can you please do an in depth video on Thorium, I am studying Thorium as a stable reactor replacement over Uranium Reactors or more over the Thorium reactors in question are called LFTR and it's quite remarkable and even so because of the fact that it can use spent nuclear energy rods and waste as fuel etc etc etc and i think allot of people that follow this channel would love to learn about this, especially the fact that in a LFTR reactor there is 0 risk of a reactor meltdown in a Thorium reactor, just a suggestion.
I like the way they call it the safety flame when it is still several hundred degrees centigrade
its because its easier to see and if you move your arm through it you wont get really bad burns
Zinc isn't a transition metal? A2 chemistry course in the transition metals module excludes Zinc from transition metals.
Am I right? Or just misinformed?
This stuff is fun to play with when you’re mixing 30 pounds at a time into dilution with water for groundwater remediation. No matter how clean and careful you try to be there will always be a purple mess or brown stain.
is the molten salt of Mg magnetic?
i am 13 but i subscribed to this channel
Now, how is that relevant?