crystal grower
Hazard to Others
Posts: 474
Registered: 3-1-2016
Location: Os Petrosum
Member Is Offline
Mood: Puzzled
|
|
Nickel(II) something-nate sludge
I needed to make some Ni(NO3)2 so I reacted HNO3 with Ni (Nickel was in a slight excess). Beside green solution I got this weird precipitate after
filtration. I have no idea what it is. (The solution is dilute enough to Dissolve all the salt).
Can anyone help?
 
[Edited on 18-5-2018 by crystal grower]
|
|
|
DraconicAcid
International Hazard
Posts: 4357
Registered: 1-2-2013
Location: The tiniest college campus ever....
Member Is Online
Mood: Semi-victorious.
|
|
Looks like nickel(II) hydroxide from not adding enough acid?
Please remember: "Filtrate" is not a verb.
Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
|
|
|
crystal grower
Hazard to Others
Posts: 474
Registered: 3-1-2016
Location: Os Petrosum
Member Is Offline
Mood: Puzzled
|
|
It looks like that. I did not realize it will form hydroxide, I thought excess Ni will simply stay unreacted. I'll try adding more HNO3
|
|
|
LearnedAmateur
National Hazard
Posts: 513
Registered: 30-3-2017
Location: Somewhere in the UK
Member Is Offline
Mood: Free Radical
|
|
How could a nickel hydroxide ppt. form without some sort of base in those quantities? I thought you would need at least a small amount of ammonia or
alkali hydroxide to do so. Haven’t really had a play around with nickel compounds so I’m curious.
In chemistry, sometimes the solution is the problem.
It’s been a while, but I’m not dead! Updated 7/1/2020. Shout out to Aga, we got along well.
|
|
|
DraconicAcid
International Hazard
Posts: 4357
Registered: 1-2-2013
Location: The tiniest college campus ever....
Member Is Online
Mood: Semi-victorious.
|
|
I'd guess Ni(II) hydrolyzes to give nickel hydroxide and hydronium ion, and the hydronium ion reacts with more nickel to give Ni(II) and hydrogen.
Please remember: "Filtrate" is not a verb.
Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
|
|
|
fusso
International Hazard
Posts: 1922
Registered: 23-6-2017
Location: 4 ∥ universes ahead of you
Member Is Offline
|
|
Quote: Originally posted by DraconicAcid  | | I'd guess Ni(II) hydrolyzes to give nickel hydroxide and hydronium ion, and the hydronium ion reacts with more nickel to give Ni(II) and hydrogen.
|
Shouldn't Ni reduce HNO3 to NOx instead of H2?
|
|
|
DraconicAcid
International Hazard
Posts: 4357
Registered: 1-2-2013
Location: The tiniest college campus ever....
Member Is Online
Mood: Semi-victorious.
|
|
Depends on how much nitrate ion is left in solution.
Please remember: "Filtrate" is not a verb.
Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
:
