All Questions
Tagged with ionic-compounds ions
26
questions
1
vote
1
answer
105
views
Cesium Chloride Density Gradient Centrifugation and Isotopes
In Cesium Chloride Density Gradient Centrifugation, as used by Meselson and Stahl, Cesium ions can be seen as strongly affected by centrifugation, so much so that they can overcome their ionic bonds ...
- 433
-1
votes
1
answer
131
views
Why do samples of ionic compounds break into pieces, but the pieces do not combine into larger samples again?
A distinct property of ionic compounds is that they are brittle. We are taught this is due to the fact that when force is applied to the lattice, ions are shifted, resulting in positive ions repelling ...
- 27
-1
votes
1
answer
257
views
Is lead iodide a strong electrolyte?
So, lead iodide is insoluble. I see conflicting answers online. Some say it's a weak electrolyte because it is insoluble, others say it is a strong electrolyte because it is an ionic compound and any ...
- 21
-2
votes
1
answer
172
views
Do hydrides, like NaH or CsH, also form H-bond? [closed]
I know that when hydrogen acts as a cation, it can form H-bonds with the electronegative ions or groups. But, is this also true for anionic hydrogens? Will they form similar bonds, other than the ...
1
vote
1
answer
959
views
Why does lattice enthalpy decrease with increasing ionic size?
Lattice enthalpy decreases as ions get larger, but I have found two explanations:
The charge density is greater in smaller ions, so greater attraction
The ions are themselves able to get closer ...
- 209
7
votes
2
answers
708
views
What happens to boiled (BMIM)PF6?
[BMIM]PF6, or 1-butyl-3-methylimidazolium hexafluorophosphate, is commonly used as an ionic liquid. As has been shown by the accepted answer to this question, sodium chloride that has been made to ...
- 1,264
2
votes
0
answers
28
views
A question about nicotinamide adenine dinucleotide
In the structure of NAD+, why does the nitrogen of pyridine bind covalently to the the first carbon of glucose while the anion stabilizing the nicotine amide ion is the phosphate group? In other words,...
- 565
1
vote
1
answer
295
views
The "nose" of the periodic table [closed]
My teacher said that on the periodic table there is a "nose" formed by Al, Zn, Ag, and Cd. She said that they are all fixed charged (+3, +2, +1, and +2 respectively), and said that if I write them in ...
- 123
1
vote
0
answers
91
views
Lattice Energy of MX2 type
While finding the solution to the question that which among BaO and BaCl2 has hi that is energy I found that it was BaO whose lattice energy is high and there were explaining it just with charges. So ...
- 37
0
votes
1
answer
459
views
Very elementary question about valence electrons of ionic compound
In a university entrance question, I found this question:
What is the number of valence electrons of $\ce{Mg(OH)2}$? Answer = 24
I know that Mg has 2 valence electrons and O has 6. But I don't ...
- 123
1
vote
1
answer
6k
views
Why is the empirical formula of sodium chloride NaCl? [duplicate]
Since we know in sodium chloride crystal sodium ions are surrounded by $6$ chloride ions and each chloride ions are again bonded to $6$ sodium ions. What I want to know is that on what basis empirical ...
- 1,005
-5
votes
3
answers
22k
views
Why is the overall charge of an ionic compound zero?
My textbook simply says:
Since an ionic compound consists of equal number of positive and negative ions, the overall charge of an ionic compound is zero.
But why is the number of positive and ...
- 115
1
vote
1
answer
134
views
Air ionization, positive ions
Sharp air cleaners has a technology called PlasmaCluster. They say that it produces negative ions $\ce{O-}$ and positive ions $\ce{H+}$ (the difference with classical ionization is that ionization ...
- 113
-1
votes
1
answer
3k
views
How can one determine the charge of a polyatomic ion? [closed]
I'm stuck on determining the charge on various polyatomic ions according to the rule of charge balance. I keep getting 0 for each of these, but wonder if that's not the case.
$\ce{KMnO4}$
$\ce{K2C2O4}...
- 9
-4
votes
2
answers
14k
views
Chemical Formula for Barium Chloride
Barium Chloride is represented as $\ce{BaCl2}$.
Since chlorine is a diatomic molecule, It should be denoted as $\ce{Cl2}$.
Formulating, we get
\begin{array}{|c:cc|}\hline
\small \rm Element & ...
- 103