Calcium (version 1) - Periodic Table of Videos

[martinmartiini]

nasty british lady, ughh, .. and nasal voice

[mcwario13]

pause at 2:44.



[candygurlz14]

wow thanks! i needed a video to help tie in a project about calcium. this is really helpful and tied the project all together perfectly.

[thelonelychemist]

smart women turn me on

[nickcorn93]

calcium is not relatively soft at all. I have a sample at home. Whereas you can cut sodium or potassium with a knife, calcium is barely dented when you apply pressure.

[artregeous]

good for calcifying you pineal gland block your essence

stress each and every cell forget about it as supplement

no relation with bones etc one of the worst very british element

for human health mind and cognetive liberties

if i dig i bet excessive introduction of it would be related with

perception management and mind control probably

with certain philsophies rooted in england not as a ytpical authentic

british thing but either briton or you name it

[Adib1611]

i wish i can be as genius as them,, :)

[Khaied345]

I didn't know our bones are made of metal!?

[33alienware]

2:39 WTF?

[ijunkie]

about 20 :)

[EleG3]

1:55

[omerta410]

LOL!! this woman speaks really fast!!!

[vmelkon]

limelight = candoluminescence

[sanin92]

HAHAHA 2:40 to 2:46 WHY DOES SHE MAKE THAT FACE ?? HAHAHAHAH WATCH IT!!!!!!!!

[scorpion779946]

@sanin92 very interesting.

[1993gandy]

I HAVE CALCIUM FOR BREAKFAST

[adjuvants12780]

isnt chalk calcium carbonate?

[ThrowingItAway]

@adjuvants12780 yeah it is

[blueduderanch]

@adjuvants12780 chalk used on blackboards is actually gypsum which is calcium sulphate. its also used in plaster boards, also called gypsum boards. hope it helped.

[karlhenrikberger]

nice hair! XD

[xXshinzoXx]

Chemistry, I would argue is the most pure form of science. It truly is just experimentation, no ideologies, no biased thought, a truly ironically 'pure' science in my opinion, with physics falling shortly behind.

If only Biology could be under less straneous criticism under religious dogmas, we would all benefit.

Interesting video nonetheless, I'd appreciate more interesting videos such as the one you guys did on the "chemistry of tea" though. Great work.

[kuro96inlaila]

at 0:52 ,his mug have periodic table...

[looklikela]

i need help to find a way to test the pureness of gypsum (CaSO4·2H2O.)

my project is to take a old plasreboard and crush it then sort the paperfiber from the crust material i got a machine that can do that but i need to test how pure the gypsum power is hope somone can tell me how to test it or even better make a video that showe me how

[Technolab]

I love those vid's thnxs for the up's .......very intresting.

[dialdeath2820]

I'm pretty sure you can pause it anywhere with that chick on screen for a funny face.

[jeremiahswee]

haha esp. after 2:40, i feel like im staring into the face of satan

[spice419]

0:56 nice.

[ershan89]

Well marble is CaCO3 as far as i know and i think it looks quite nice^^

[LatinDelicious]

oookkk I am so used to the US accent that for me their English accent is like a new language but those "lord of the rings" movies have helped me a lot. I am a Spanish native speaker so that is why. Australian and English accent kills me but with lord of the rings somehow i understand the English better now and then i saw Harry Potter and that improved my ability to understand English accent too....

Anyways....that professor look like a pedophile Einstein

[ns88ster]

you sound like speedy gonzalez amirite?

[Kulawendin]

That chick could talk forever.

[Qtmas]

the prof. says that chalk is both calcium sulphate and calcium carbonate. which is it?

[freedom729]

All "chalk" used on blackboards is now actually gypsum (calcium sulphate). Real chalk (calcium carbonate) was replaced because the dust is fairly toxic. The two materials look almost identical.

[Desmaad]

Don't forget, real chalk squeaks unpleasantly.

[tomguelph]

LOL pause at 1:22

[smeghead666]

@tomguelph 1.22 lmfao...

Why so serious!?

[krstcmjns]

@tomguelph LOL Hey, I make funny faces all the time and that's funny?

[matthew623210]

So if you had calcium carbide with water dripping on it, would that make the light itself or do you have to burn the gas that it emits?

[metalheadrowi]

You have to burn the gas (acetylene)

[minerofblood]

yeah its used in wielding.

[Onyxwolf3]

yeah in what are called oxyacetylene torches because of the premixture of oxygen and acetylene.

[kevin80k2000]

the chick is so annoying

[jacobssandy]

if you take a glass of milk and leave it in the sun to evaporate for a few days will it leave behind pure calcium?

[Pottzy123]

nope, it justs goes off because the milk denatures (i think thats it)

[Phacias]

No, it will decay and give you only lots of awfull smell of milk acid. Milk and all milk products contains only compounds of Calcium.

[Dark3ndWarrior]

Well surely if it gives of acetylene as a gas, that could surely be used in power stations a substitute for coal, it may stil be a hydrocarbon, but its has a lower burning temp then other hydro carbons, allowing for a quicker ignition of a furnace

[Dark3ndWarrior]

Surely on a mass scale calcium Carbide could be used in power stations, after water has been exposed to it (like with the old bike lamps) it gives off the gas (I think is Acetylene) what can then be lit, thus boiling the water, what turns to steam and yahdy yahdy yar in the end giving us electricity, becuase of what i have understood it could be used as a counter part for coal power??

[3carrothead3]

THAT GUYS HAIR IS AMAZING!! But really, he seems like a pretty awesome guy. I'd love him to be my science teacher

[0Sebek0]

I don't think it's "calcium carbide" what producces acetylene, it really is what I would call CALCIUM ACETYLIDE

[thelaughingjackle]

no, its calcium carbide, that is CaC2

CaC2 + 2H2O → C2H2 + Ca(OH)2

Calcium Acetylide would be CaCH2 but it doesn't exist anyways so that doesn't matter in the least

[sciencoking]

are you sure? i thougt acetylide and carbide are the same ion...

[metalheadrowi]

Indeed, acetylide and carbide are the same ion...but the gas mentioned here is called acetylene (C2H2). You can prepair it by adding water to a carbide, for example silvercarbide (also called silveracetylide)

[sciencoking]

and that reacts with water like this:

AgC2 + 2H2O -> Ag(OH)2 + C2H2???

i didn´t know that silver hydroxide can be stable...

[metalheadrowi]

You're right! Sorry, my bad!

But it's Ag2C2. ;)

Silver acetylide solutes in water.

[sciencoking]

i thought silver would make Ag2+ ions... like copper...

[pHzerodotcom]

@sciencoking, Ag2+ ions are rare, Ag usually forms Ag+ ions

[sciencoking]

yep, after some thinking i remembered that the copper group normally forms 1+ ions.

[freedom729]

Copper forms 2+ ions most readily. The 1+ ions are not stable and tend to react to form copper metal and copper 2+ ions.

[peroslowned]

hehe, i guess there is some kind of subliminal propaganda at this university which makes everyone add "quite" next to an adjective :D

[Envergure]

I hate calcium it screwed up my design lab!

[sliver321123]

BASTARD!

[unicyclist0]

I want to push her glasses up...

[AlwaysReadTheLabel]

Anonymous chemistress is so enthusiastic, it's fantastic. Gotta be one of my fave periodic vids!

[zcollvee]

lol at her goggles.

[CitizenErased2007]

View 10,000 ! woop :P

[pyrioni]

I don't understand, why professor said "Calcium Carbonate ~ chalk" at 0:08 , but also said "Calcium Sulfide ~ chalk" at 0:48 ??? I'm confused.

[vmelkon]

Chalk is probably calcium carbonate. Try to add some HCL and see if CO2 is given off.

[pyrioni]

I don't understand, why professor said "Calcium Carbonate ~ chalk" at 0:08, but also said "Calcium Sulfide ~ chalk" at 0:48 ??? I'm confused.

[Envergure]

You can use both, or in fact anything white that rubs off.

[KaosSchmoo]

Hawt science chick is hawt!

[DHoffman2392]

yeah i'd glaze

[Nachtegaaal]

Wow. Woman. Easy there. ADD much :O

[Wufnu]

I dunno about you but I find women passionate about what they do hawt. It's so boring to talk to a girl with dead eyes.

[Dethark75]

Ah, so that's where "in the limelight" came from...you learn smoething new every day.

[panzerschreck77]

the lad with the fuzzy hiar looks like a mad scientist

[Bernler75]

Why can you buy so many things everywhere except for Sweden...

Hate this country-.-

[atomic7732]

eBay

[ketamunke]

I'm shaky like that guy. I don't know why. I guess it's from being super genius. Just kiddin'.

[boaterboyhustler]

You can still buy carbide caving lights