halogens

As prophesied by the Dead Space Scrolls, Afu Chan, Victoria Grace Elliott and I will be at TCAF this coming weekend! Here’s a peek at some of the comics we’ll have, including the just-released HaloGen #3.

Afu will also have his gorgeous prints available, and Victoria will have her own assortment of awesomeness as well. You can find us at Table 110 on the first floor.

For more info on TCAF, click here. It’s free!

I tried a halogen exchange reaction with silver(I) fluoride, but instead of the silver(I)-chloride what is white participate I got a quite nice silver mirror on the inner surface of the vial. 

Silver(I)-fluoride is a “tricky” chemical, it’s the only silver halogenide what is soluble in water with a solubility 179.1 g/100 mL (25 °C). Therefore it’s also quite toxic, since not even silver or fluoride ions are good for your health in a large concentration.

8/9/14 Collin’s Garage with @onyourmarksnj @crosstowntrain @northrunner_ @gin_war & #halogens

📷: @angieenicoleee (at Suffern, New York)

Halogens

Trends

  • reactivity, electronegativity, mpt, bpt, all increase up the group  because the ionic radius is smaller up the group, as there is less shielding, so the attraction between the electrons and nucleus will be stronger towards the top
  • the solubility increases up the group because they are more electronegative and polar, so can overcome the forces of the hydrogen bonds in water. note that fluorine also exhibits hydrogen bonding.
  • they look darker and become more volatile down the group, this is because there will be more electrons in the elements towards the bottom, so they will have stronger intermolecular forces. this is why iodine is a solid, bromine, a liquid, and chlorine and fluorine are gases.
  • become stronger reducing agents as you go down

Reactions

  • with hydrogen H2 + X2 —> 2HX
    chlorine needs dark
    bromine needs a platinum catalyst at high temperature
    iodine needs a platinum catalyst at a high temperature 
  • hydrogen halide + ammonia gas —> ammonia halide
  • halogen + sulphuric acid —-> hydrogen halide (they are oxidised)
    chlorine= steamy fumes (HCl)
    bromine= misty fumes and red/ brown vapour (HBr)
    iodine= violet fumes (HI)
  • potassium halide + Cl2 —> potassium chloride + halogen
  • disproportionation reactions with alkali

Tests 

add dilute nitric acid and aqueous silver ammonia.

  • chlorides= white ppt
  •  bromides = cream ppt
  • ioides = pale yellow ppt

to that ppt, add dilute, then concentrated ammonia

  • AgCl= dissolves in dilute ammonia
  • AgBr= only dissolves in concentrated ammonia
  • AgI = does not dissolve in any
snippet one: fluorine

fluorine explodes into the room, yelling about some nonsense or another. i make a spirited attempt to ignore her. she is too damn perky and it is too damn early. i turn another page of my book, hoping she would see reason and leave me the hell alone. no such luck.

‘did you even listen to anything i just said?! stop reading that dumb book, you can read that dumb book any time, but what you can’t do is listen to me any time, because i’m only going to say this once more and then i’ll never say it again. never ever ever again.’

i thumb another page and scan the words with passionate and focused intent. she flicks her short blonde hair and fixes her piercing, searching eyes on me.

'astatine, you cold and heartless cow, can you not just humour me for a mere six seconds? if it weren’t for all our other sisters, i’d be your only sister and if i died, you’d live on never knowing what i, your only sister, would have said…’ she lets out an almost-convincing sigh. i admit defeat.

'… you have six seconds’

she takes a deep breath and i brace for impact.

'i need money’

youtube

my friend uploaded this YEARS AGO and i just rewatched it today, BUT IT’S AMAZING!!!!!!

omg I’m bromine, the broest element of them all. we’re really funny. enjoy

astatine can suck it

I have the weirdest science teacher ever. I kid you not, he was talking about the periodic table, and he called the halogens (group 17) or whatever horny because they’ll ‘mix with anyone.’ Then he called another group bisexual. Then we were talking about chemical equations and the different kinds, and he kept saying that one element 'hooked up with another at prom’ and 'went home to have some more fun’… like are teachers even allowed to do that? lol