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My water comes from a well. There is no toxic chlorine in it.

Hello Professor I am interested in studying chemistry, but I find it difficult to understand because I am an Arab and my English is poor, I hope you will add subtitles to your videos for more benefit and thank you again.

Professor, thank you for the excellent lecture and story. I learned a bit more about potassium permanganate than I thought I knew! Cheerio

Thank you for the lecture!

I thought for a moment I had gone back in time... Again😅 How long did it take you to develop this talk, has it change much over time? Always good to see you again!

Szanowny Panie Doktorze, jak zawsze- niesamowicie. Proszę nie zapomnieć dodać linka na swój profil Researchgate dla lepszych zasięgów ;) Pozdrawiam serdecznie, Paweł z ECOpole

wow!

So interesting! Thank you for sharing!

great presentation, definitely enjoyed this!

Thank you so much for this and all your other work with RI lectures Mr Szydlo. Am very engaged with all your work and the work of the Royal Institution.

Fantastic! Happy birthday, and cheers to many more!

Happy belated birthday Dr. Szydlo! Thank you for sharing this wonderful gift with us!

And cheers, Sir! 😄

Congratulations! :)

Wszystkiego najlepszego Panie Doktorze!!! :))

Happy birthday! Glad your eye got better!

Many happy returns! 🎉

Happy birthday, Dr Szydlo 🎂

Wszystkiego najlepszego!!

Fascinating video! Although one take away/observation I cannot help but notice (not just from you) but throughout all of chemistry, is that Id love to know SO much more about the properties of each chemical and their effects on other molecules (especially in regards to human biology) , purposes that may present to help humans, animals, or be beneficial for the environment. But I feel like there has always been a disconnect in chemistry for me, for most presentations are displaying reactions which are not too thoroughly explained by their chemical reactions, but only through there reactions with other chemicals not exactly pertaining to us, with indicators such as change in colors, heat, smell, etc... I always feel like it's only the top of the iceberg. And how useful is the knowledge if it's not present in modern day life? p:s: Excuse my POV, I am looking to go back to college for chemistry and find many parts of it interesting, but Id like to know more about the effects on biological cells/ like he was saying at the beginning, how chlorine can be so dangerous yet has helped millions of people be able to drink clean water since we invented water treatment. Id love to have any suggestions to point me in the right direction of where I should look to for a passion of wanting to decontaminate toxins from our environment to try to help give the people around me a better, healthier life. The college near me, has invented a new method of decontaminating the soil near the old airfare bases of the PFAAS which were leaking into the groundwater, giving KIDS cancer, and was neglected by the federal government, (Samples of water were delayed over a year due to the NINE people having "unexpected illness, just to find a year later over 70 households were contaminated far over the safe level), but the college has found a new way to pull the PFAAS to the surface by growing certain mycelium, and then growing hemp, which stores most of the PFAAS in them, which then has to be located somewhere else as waste (another issue). But given all 5 of the Great Lakes are all now contaminated with PFAAs, I would like to get into a field of chemistry that could help save people from the poisons of big corporations that the government defines "safe levels" of, aka a maximum amount of people can die from per year.

I am a big fan of you Dr Szydlo

Nice presentation, enjoyed the video.

Pine trees, turpentine is from the distillation of pine resin.

Some years ago I was cleaning out an open top water tank which had become coated with organic slime internally. I drained the tank and , leaning in, proceeded to scrub the walls with 14% sodium hypochlorite solution, not allowing for the fact that chlorine would be released as the hypochlorite broke down the slime. One whiff later was one whiff too many. Breathing was affected for weeks, and on day two I started bringing up pink coloured mucus. Took about a month to recover. Cannot imagine WW1 trench warfare gas attack.

This was amazing! Thank you for showing us these fantastic experiments!

I don’t know how to explain this but he speaks with the tone of voice of a passionate chef. And I didn’t expect to want to watch this the whole way through but this was just so fascinating and I didn’t realise there was so much to know about Cl

amazing

They don't make them like this anymore.

Another real treat for us from a proper chemist- a rare breed now alas! Please Dr Szydlo may we have some more! Wonderful thank you both.

Szydlo is just an absolute joy to listen to. Unfortunately, the acoustics of that room aren't! I really hope you consider investing in a hands-free mic, these lectures are a treasure trove of knowledge and I'd love to see more of them.

Please Please Please get him a lapel mic.

Hello, sir! I love your vids at The Royal Institution! Subbed

Wonderful! Bravo! Thank you for this lesson on chlorine, I learned a lot!

Excellent as always, Dr. Szydlo. Finally, no more waiting for the Christmas lecture at RI. The channel deserves a lot more subscribers.

is there a way to contact you via email at all, i have plenty of questions i’d love to ask

Thank you all

Brilliant as usual, many thanks Andrew.

Great demonstration of reactions with chlorine, beautiful color changes and flames. The super toxic fumes were scary though 😊

I remember when I was maybe 13,and testing chlorine with indicator, and forgetting for far too long that it was a bleaching agent 🙈 I once dropped some blood into chlorine, and it went from red to just black, it almost looked burnt, I guess it corroded the iron content of the blood, and absolutely you do not want that in your body

Great video as always Szydlo. Do you have any reading recommendations regarding chemistry? Wondering where you get all your ideas for demonstrations - they are superb :)

Another wonderful lecture by the equally wonderful Dr Szydlo - fantastic

I love watching your lectures. They are very informative.

I can only imagine the Hg vapours!

Thank you, Sir

Yet another proof that many scientists are also artists.

Great lecture.

Truly a superb lecture! All in one take too, very impressive. I have to say, the history was my favourite part. Completely changed my view of chemistry. Really, one of the best lectures I’ve ever seen.

Have you ever seen the Mercury bell? It had no ring because of its density, obviously had to be frozen, you are brave to put so much into such thin containers and have no catch containers I wondered, could the escaping nitrogen gas also carry with it mercury vapor, or is that the reason you are right by the fume hoods I too had an amalgum filling, about ten years ago, which I late removed, I proved it was still producing vapor by placing it into a tube and evacuating the air, after some time the introduction of high frequency electricity produced the uv glow of mercury, rather than the spectra of the air, comforting to know it isn't in my mouth any longer! Great demonstrations!

Ah wonderful, I was recently hoping you'd make a comeback to your channel!

He just gonna ignore him putting his hand directly into the flames?