How to make Iodine

In this video we detail the synthesis of elemental iodine from readily available chemicals. I bought 50grams of sodium iodide from a chemical supplier on eBay and the rest of the chemicals I purchased locally. This synthesis isn't 100% efficient since some iodine is lost in solution as sodium triiodide, But you still get a good yield. It's also suggested to use a bit more acid maybe 40ml instead of 36ml.

Yes iodine is used in the manufacture of methamphetamine, but that doesn't mean it has no other perfectly legitimate uses. The DEA might as well impose a ban on salt since it's used in making methamphetamine...

Anyway, we'll be using this iodine in a future video to make potassium iodate and nitrogen triodide, as well as some redox reactions with it.

Category:

Science & Technology

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• iodine
• sulfuric
• acid
• potassium
• sodium
• iodide
• chemistry
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[rabbitphobia]

Isn't it possible to use this stuff to make a friction detonating explosive?

[spotlightman1234]

@rabbitphobia yes, nitrogen triodide.

[b1912313]

@CampbellChemistry Ops...My bad on the corrosive/power thing.

[CampbellChemistry]

@b1912313 i would agree that hydrochloric acid is more POWERFUL than hydrofluoric acid, but i said corrosive. i tis possible that the sulphuric acid would oxidize the HI, as the sulphate ion is more reactive- my bad.

[b1912313]

@CampbellChemistry Sulfuric acid will oxidize HI to I2. And as far as I know, HCl is more a powerful acid than HF, because it has a higher dissociative rate.

[CampbellChemistry]

@b1912313 Yes, it is possible to make:

H2SO4+NaI --> NaHSO4 + HI, the hydrogen iodide can then be dissolved it to water.

However, the corrosive power of the acid decreases (i think) as you get lower down the halogens, for instance, hydrofluoric acid is much more corrosive than hydrochloric acid, and is much more dangerous, so i don't think making hydroiodic acid would be much of a problem. hope that helped.

[b1912313]

@spotlightman1234 Uhm...But I would like to make hydrogen iodide with I2. Is it possible?

[spotlightman1234]

@b1912313 If you somehow have access HI you could reduce it with hydrogen peroxide.

2HI + H2O2 --> 2H2O + I2.

[b1912313]

@spotlightman1234 What about the HI?

[rabbitphobia]

@6squirrels Thanks for that info if you made a video I'd like to watch it and I am sure others would...*snicker*

[spotlightman1234]

@99Chemicals The thing I don't like about that method is that it releases a lot of H2S.