Chemistry experiment 47 - Sublimation of Iodine

At room temperature, elemental iodine is a black-bluish solid.

When heated, solid iodine sublimates and enters the gas phase.

Iodine got its name from the Greek word ‘ἰοειδής’, meaning ‘purple’. Indeed, iodine vapor has a beautiful purple color.

Regaining solid iodine from iodine vapor can be achieved by cooling down iodine vapor on a cold surface.

Beautiful iodine crystals are formed.

Hazards:
- Iodine is toxic

[faithcameron]

when it's solid it looks like blueberries

[saima]

Anyone here from onljne work at school

[jessicacourson]

Beautifully executed video. Thank you for the subtitles.

[utalis]

it melts into a liquid at 110 degrees and vaporizes into a gas at that temperature and pressure.Increasing the pressure will keep it in a liquid state. 5 grams of iodine heated in a sealed test tube(increasing pressure) will turn into a liquid and stay that way for a few seconds before boiling off into a gas. This result may also be seen if you use a larger amount of iodine, or a pressure chamber.

[drifty_]

0:08 At first I thought they were blueberries

[elmothekillerofcringe]

Hey dude one of my online classes used you're video

[RurouniKalainGaming]

I miss my old science classes, lol. Never get to do cool stuff like this in person much anymore.

[laxmikaur]

Science is so beautiful...(when its practical😜

[lacane]

why do people dislike the video. They got what they wanted

[azlanyaacob]

Hi, I'm wondering if I can use a snippet of this video for our college's (Labuan Matriculation College) video production for online teaching (due to covid19). It is not for commercial purpose. We will credit you in the video.

[madikellestine]

awesome video!!! ill show this to my class

[atlasnox]

I have a few questions! first, how sturdy are these crystals? can I repeat this process to get more, bunched, and thicker crystals? how long does this take? could I freeze, say, an animal skull and get the same effect, it would it not stay cold long enough? last, are they toxic after forming?

[patnor]

If they are dissolved in distilled water what is the way to get them back to solid state but more like they look like at 0:13 and not as crystals.

[camilla]

What if our hands stands above like the ice? Will our hands be covered with those crystals?

[robertguenther]

That's awesome but nobody explains how long it takes to leave the round bottom flask on top and how long it takes to form crystals?

[eunaekim]

Yes, but is there any residue left on the outside of the flask?

[SAM-qvkz]

May i know how long it will take for the crystals to form?

[impanab.m]

when it was purpl balls. !!!! 👍👏👏👏👌👌good well done. 😇👌👏👌

[MediaSubliminal]

How do I deal with the condensation on the top flask? It just drips water back into the bottom beaker and I never collect any iodine.

[sarahmarshall]

Shouldn't you be wearing protective gloves for lab work? (Just for good practice and as an example to the kids.)