« first day (2890 days earlier)      last day (1796 days later) » 

Hot nitric acid (HNQ)
Hot nitric acid (HNQ)
10:02
1
Q: Do the spectra of compound materials combine linearly with respect to the ratios of the constituent compound spectra?

Gearoid MurphyMy question stems from reading this article on the FTIR spectrum of oil that has been mixed with various contaminants. If one has the spectrum for the original uncontaminated oil and the spectrum for water, will the spectrum of a sample that has been contaminated with 10% water (by weight) be eq...

spectroscopy ir-spectroscopy
 
2 hours later…
William R. Ebenezer
William R. Ebenezer
12:04
I was wondering, is it ethical for me (with access to the full text of most journals) to share the pdf with others (without access to full text)?
@orthocresol @Mithoron @M.A.R.
orthocresol
orthocresol
12:23
I do that sometimes. I don't feel guilty about it. But it's really a question for you to answer yourself
Guru Vishnu
Guru Vishnu
Hi @ortho :-)
How are you?
Bounty Hunter
Bounty Hunter
12:53
-2
Q: How does sodium carbonate reduce pH?

Harry TongSodium carbonate is used in pools to raise pH. From my understanding, it would dissociate in water like so: $$\ce{Na2CO3 <=> 2 Na+ + CO3^2-}$$ To raise pH, doesn't it have to absorb hydrogen ion/s? If so then wouldn't it just form carbonic acid that would then just dissociate again?

acid-base aqueous-solution ph hydrolysis
 
1 hour later…
M.A.R.
M.A.R.
13:58
@WilliamR.Ebenezer I'm a lot of things but a saint is not one of them
Much less a copyright saint
Hmm, I haven't been a lot of things . . .
Adds being things to todo list
Zenix
Zenix
0
Q: Separating lanthanides using ion-exchange method

ZenixFollowing statements are on Separation of rare earth metals (lanthanides) via in-exchange method The tripositive ions are strongly sorbed by cation exchange resin: $\ce{La^{3+}}$, the largest is most strongly held; $\ce{Lu^{3+}}$, the smallest is least strongly held. Elution of $\ce{HCl}$, th...

inorganic-chemistry separation-techniques rare-earth-elements
Any help?
1
Q: Definition of t2g orbitals in CFT

ZenixMy textbook defines $\mathrm{t_{2g}}$ orbitals as $\mathrm{t_{2g}}$ stands for a set of three orbitals which are asymmetric with respect to $C_2$ axes, perpendicular to the highest $C_n$ axes, but which is symmetric in sign through the centre of inversion. I know that “$\mathrm{t}$” is a ra...

inorganic-chemistry coordination-compounds crystal-field-theory
1
Q: Use of Spiegeleisen in manufacture of steel

ZenixI recently read the following statements related to Manufacture of steel via Bessemer Process: When no more $\ce{CO}$ is produced (i.e. blue flame disappears) a calculated amount of Spiegeleisen (an alloy of $\ce{Fe, Mn, C}$) is added and distributed throughout the mass by blowing air for som...

inorganic-chemistry metallurgy extraction
 
2 hours later…
rene
rene
16:27
Not sure if it is worth effort but a confused user that can no longer find questions they claimed to have posted on Chem.se showed up on MSE here. If a mod has a spare minute maybe give some direction, if only for the MSE users to find a duplicate, when appropriate. This is the account I think.
waves petals at @M.A.R.
Zenix
Zenix
16:52
@M.A.R. what does your username stand for?
Zenix
Zenix
17:17
The top rated answer here says that Si can be separated as a volatile substance :) B.P. of Si is 3265°C, while even of AlN produced is 2517°C.
How can we separate Si in Serpek's Process? If anyone can tell...
 
4 hours later…
Hot nitric acid (HNQ)
Hot nitric acid (HNQ)
21:14
2
Q: Separating lanthanides using ion-exchange method

ZenixFollowing statements are on Separation of rare earth metals (lanthanides) via in-exchange method The tripositive ions are strongly sorbed by cation exchange resin: $\ce{La^{3+}}$, the largest is most strongly held; $\ce{Lu^{3+}}$, the smallest is least strongly held. Elution of $\ce{HCl}$, th...

inorganic-chemistry separation-techniques rare-earth-elements

« first day (2890 days earlier)      last day (1796 days later) »