Rhodanide - 2017-07-09
Preparation of Cobalt from cobalt carbonate.
What is the size (diameter) of the cobalt particles? Is it in nanometers?
YOUR THE ONE WHO SAID "INTENSE DABBERINO" ON A ALBATROSS MATING CALL VID xDDDDDDDDDDDDDDDD
BulletProof Monk ?
Do we need to add alumunium foil on the second wash, the part after we filter the cobalt for the first time and we add HCl again?
Qatrunnada Hanifah Good question! After you create a CoCl2 solution in HCl, you add the Aluminium. This displaces the Cobalt, forming Aluminium Chloride, and metallic Cobalt. The washing with water afterwards is for removing any soluble salts from the solid, which would contaminate the final product. The HCl washings are for removing any excess Aluminium foil from the displacement, which may be left over. Thanks for your question, I love to help! :]
So we make Co(s) from CoCO3. we react it with HCl to form CoCl2. We use Al to exchage the metal (CoCl2 to AlCl3). Then we filter the excess CoCl2 and we wash it with water and acid to remove the excess AlCl3. Correct me if i'm wrong.
Qatrunnada Hanifah Correct, here's the full synthesis with steps:
1) React CoCO3 with concentrated Hydrochloric acid to form an acidic solution of CoCl2.
2) Add Aluminum foil to the mixture until it ceases to evolve Hydrogen gas. If the mixture turns thick, add cool water and continue small additions of Al foil until no more reaction can be seen.
3) Add a small amount of additional water to the mixture, and filter. Wash the black precipitate in the filter paper with deionized or distilled water, until the water that comes through the filter is clear, and not pink. (Pink being CoCl2.)
4) After filtration, you should be left with a paste consisting of Cobalt metal powder and excess Aluminium foil. Add this to a clean, glass reaction vessel and add a small amount of water, in order to create a suspension.
5) Add concentrated Hydrochloric acid, and wait until any bubbling stops, or until no more Aluminium foil remains.
6) Filter this again, and wash the black Co precipitate with either distilled or deionized water, for a second time.
7) Let the precipitate dry in non-turbid air, so as not to blow powdered Cobalt into the air, as this is unhealthy.
8) use your dry Co powder for whatever you like. :)
Hope this helps!
Rhodanide, thank you for your explanation. This really help me for my Inorganic Chemistry project.
Qatrunnada Hanifah Awesome, I'm really happy to hear that! Best of luck, let me know if I can help with anything else.
I wish I could afford vanadium, cobalt, nickel and chromium salts but I can't so I have to stop making as many YouTube videos
You neglected to tell people what you were added to the HCL
I don't understand. Could you elaborate?
Rhodanide this is what he does. Calls you out on something then doesn’t even reply lol. The annotation saying you added the CoCl2 was a little fast though
What's name change all the sudden
Aussie Chemist Ehh, I felt it was necessary. Prior name was used too much by other individuals, this one is literally used by no one else. Except for me, now.
Does my old profile pic show up for you? Or does the new one. I think mine's a bit glitchy and still shows my old one on my screen. Kinda annoying. :/
Rhodanide it shows the new pic to me as far as I can tell, idk about what you think, Azide sounds cooler to me
Aussie Chemist Yeah but there's this guy who's making music all of a sudden and decided to literally steal the name, like a prick.
How about the thermal decomposition of the cobalt oxalate you made last time?
(Make sure you don't asphyxiate yourself, as it might instead yield cobalt II oxide and carbon monoxide, like iron (II) oxalate goes to FeO and CO.
And just a thought that occurred to me: if you ever plan to try it with nickel, beware of the horrible Ni(CO)4...)
piranha031091 I tried it last night, and it was not only considerably less efficient, it didn't generate any noticeable pyrophoric Co powder. :[
So I guess it did yield cobalt II oxide and carbon monoxide instead of the metal and CO2?
(BTW, is the powder you made in this video ferromagnetic? Because cobalt metal should be, so it could be a good way to distinguish it from its oxides, which also tend to be grey-black powders)
piranha031091 havent checked.
NO3- - 2017-07-10
Fun to play with, not to eat!
Rhodanide - 2017-07-10
NO3- SAVAGERY This.