Questions tagged [ionic-compounds]
Compounds in which at least some of bonds have ionic character stronger than covalent or metallic. Many compounds called salts are ionic compounds but not all of them.
467
questions
0
votes
1
answer
75
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 ...
- 29
8
votes
1
answer
702
views
Is tropylium cyclopentadienide possible?
Has this ever been tried? The respective aromatic ions are readily accessible, e. g., in the form of sodium cyclopentadienide and tropylium bromide. It shouldn't be hard to just combine these two ...
- 81
4
votes
1
answer
134
views
What factors cause a few sodium salts to be water-insoluble?
We know that almost all salts with sodium as cation are water-soluble. But there are a few examples where the salt is water-insoluble; such as sodium bismuthate, sodium fluorosilicate, and much more.
...
1
vote
1
answer
46
views
Solubility of SrF2 in aqueous solution of NaF
This might be really simple question but I have no idea how to proceed to solve such kind of question.
The solubility product of $\ce{SrF2}$ in water is $\pu{8E-10}$. Calculate its solubility in 0.1M ...
- 23
-2
votes
1
answer
35
views
Calculating salinity from sodium and chloride in water [closed]
let me start by saying that I am definitely no chemist, so this question might (or might not) seem trivial to all you professionals out there.
I have recently found a brand of carbonated water here in ...
4
votes
6
answers
600
views
Does an ionic bond have a dipole?
Is an ionic compound like NaCl considered a dipole? It has a positive side (Na+) and a negative side (Cl-). Or is it true that an ionic bond does not have a dipole because a dipole is, by definition, ...
2
votes
0
answers
48
views
Crown ether complex formation with cesium carbonate
I am searching for some papers which form complex between crown ether and caesium carbonate. But Most papers only use caesium carbonate as a base in the synthesis of crown ether, not ionic compound ...
- 953
0
votes
1
answer
114
views
Magnesium chloride to citrate conversion (reaction/synthesis)
How would one prepare magnesium citrate from magnesium chloride and citric acid? Will it work if I just heat a mixture of magnesium chloride and citric acid in water? I'd expect HCl to vaporize off.
...
4
votes
1
answer
446
views
Why does KCl have FCC structure instead of BCC?
I have this table here.
\begin{array} {|r|r|}\hline \text{Radius Ratio} & \text{Coordination number} & \text{Type of Void} \\ \hline <0.155 & 2 & \text{Linear} \\ \hline 0.155-0....
2
votes
1
answer
125
views
Cannot identify C[Mg+]
I am not able to identify the molecule C[Mg+]. I came across it a number of times in the USPTO-50k dataset, in reactions such as the one shown below:
...
- 41
-4
votes
1
answer
94
views
why chemical bond between Na and Cl happens [closed]
We know that if Cl and Na get too close, they produce ionic bonding.
Cl has 17 proton and 17 electrons and is considered stable.
Na has 11 protons and 11 electrons and is considered stable.
I ...
- 119
-2
votes
2
answers
166
views
Why is Fe3O4 a non-stoichiometric compound? [closed]
Fe combines with O in a whole number ratio 3:2. Even the ions Fe2+ and Fe3+ are in the ratio 1:2. Then, why Fe3O4 is a non-stoichiometric compound?
- 11
-2
votes
1
answer
52
views
Can ionic and/or metallic bonding produce stable long chains? Like polymers, though not necessarily as useful [closed]
Question
Polymers are long chains ⛓️ of covalent bonds.
Can similar structures exist for ionic and/or metallic bonding? They don't have to be as useful.
I know there can be polymers with ionic bonds ...
- 119
3
votes
1
answer
157
views
Can I convert copper(II) acetate or carbonate to copper(II) sulfate?
I am a high school student who does chemistry as a hobby, and as such I really don't know very much. I managed to make some copper(II) acetate and copper(II) carbonate, and now I'd like to convert it ...
1
vote
0
answers
105
views
Hannay smith equation derivation
Our chemistry teacher taught us about Hannay smith equation for calculating the percent ionic character. He did not told how that equation was derived. I could not find any satisfactory result from ...
- 21
2
votes
1
answer
102
views
Why metal hydrides have low lattice enthalpy
Lattice enthalpy is inversely proportional to the distance between the ions. And the trend of lattice enthalpies is: $\ce{MF>MCl>MBr>MI}$. But why do metal hydrides have lesser lattice ...
- 368
1
vote
0
answers
37
views
How to change the counterion of a nucleotide salt?
I need to take the sodium nucleotide salts I have available in my lab and modify them to instead contain some more exotic counterions. Can I do this by binding my nucleotides to a strong anion ...
- 109
19
votes
3
answers
4k
views
Are salts (e.g. NaCl) soluble in liquid metals?
I'm curious whether any salt would at all dissolve in a liquid metal, such as gallium, mercury, or some other metal in the liquid phase?
A Google search of "solubility of NaCl in Mercury" ...
- 391
0
votes
1
answer
204
views
Why should we not add the H+ ion conc coming from water before calculating pH of acidic/basic solution?
For eg:
If we are calculating pH of the soln of a strong acid, we shall do this:
pH= - log [H+]
Where H+ is the concentration coming from that acid.
Why shall we not add to this concentration, the H+ ...
- 11
-2
votes
2
answers
76
views
Are mixtures of finely ground solid fertilizer compounds stable? [closed]
If I had a combination of the following as finely ground powders, would it be relatively stable, or would they react to form other compounds?
Sodium Nitrate
Ammonium Nitrate
Calcium Nitrate
Potassium ...
1
vote
1
answer
1k
views
Compare the covalent character of ZnCl2, CdCl2,HgCl2
I want to know how to arrange the covalent character of ZnCl2, CdCl2, and HgCl2.
By Fajans' rules, We know that a smaller cation equals higher covalent character.
We also know that atomic size ...
- 29
2
votes
3
answers
304
views
Why would a metal form an ionic compound with a nonmetal from a lower period?
Take sodium iodide for example. I understand both elements can obtain a full outer shell via the electron transfer. But doesn't the electron move from a lower-energy orbital ($3s$ in sodium) to a ...
- 131
1
vote
0
answers
88
views
Confusion related to exception in Fajan's rule (Regarding prediction in solubility of compounds in polar solvents)
My teacher taught us that higher the ionic character in a compound, higher is its solubility in polar solvents like water.
To illustrate this statement, he also gave us the following example-
LiOH< ...
- 105
3
votes
1
answer
121
views
Covalent character of bonds in uranium hexafluoride
In one of the questions in a qualifying exam it said that $\ce{UF6}$ is a "covalent compound". This fits the physical properties of the compound well, e.g. low boiling point, existence as ...
- 453
1
vote
0
answers
888
views
How many multivalent elements are there? [closed]
According to this video there are 20 multivalent elements, and from the periodic table, I see 20, but according to multiple websites, including this, it says there are only 5. What am I not ...
- 1
0
votes
1
answer
783
views
How do we know the ionic charge of iron or elements such as iron on the periodic table?
How do we find iron's ionic charge? I was taught that we use roman numerals but I don't see any on the basic periodic table of elements (I'm using this one). So how do we find iron's charge of Fe 2+ ...
- 1
-1
votes
1
answer
181
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
1
vote
1
answer
57
views
How do clay particles form a colloidal mixture?
I have been learning about water coagulation in my chemistry textbook. Apparently, before being treated, water has clay particles, primarily silicates and aluminosilicates, which apparently have a ...
- 29
-1
votes
1
answer
327
views
Safely removing sodium hypochlorite crystals from hard-to-reach surfaces
I have a small bathing whirlpool which wasn’t used for over ten years. It is built into the ground and I cannot reach the disinfectant container to replace it with a new one. I can access the fill-...
- 9
4
votes
0
answers
42
views
How can I transform Thiamine sulfate to Thiamine hydrochloride?
I have got thiamine sulfate and want to have thiamine hydro chloride. Can I obtain it by dissolving thiamine sulfate in water and adding calcium chloride water solution as long as calcium sulfate will ...
- 41
0
votes
0
answers
80
views
Does solid sodium hydroxide react with carbon dioxide and air moisture?
I heard a claim in the context of soapmaking that a stray grain of sodium hydroxide will decay into soda ash, i.e. sodium carbonate, on contact with air. This reaction happens in an aqueous solution, ...
- 101
0
votes
0
answers
244
views
AlCl3, Al2O3, Al(OH)3. What is more ionic?
I tried with fajans' rules.
First I got AlCl3 and Al2O3. There, because O2- has high negative charge I decided that Al2O3 is less ionic. But my teacher told us that we can get the same thing by ...
2
votes
0
answers
51
views
Why is the Conductivity trend same in fused and in dissolved or aqueous state of ionic compounds?
For an example if we take $\ce{KCl}$ and $\ce{NaCl}$ then I have understood the part where in aqueous state $\ce{Na+}$ becomes bigger than $\ce{K+}$ hence the conductivity reverses but in fused state ...
- 31
0
votes
0
answers
45
views
Data for Madelung Constants
Where can I find data for the Madelung constants for various ionic compounds? Specifically, I am looking at silicon tetrachloride, yttrium (III) chloride, zirconium (IV) oxynitrate hydrate, niobium (V)...
1
vote
0
answers
62
views
Which atom carries charge in polyatomic ions?
I have a basic confusion regarding polyatomic ions:
Is it meaningful to say "which atom" in a polyatomic ion is charged?
Consider for instance hydroxide OH$^-$:
The oxygen has greater ...
- 141
-1
votes
2
answers
93
views
Displacement Reaction [closed]
In a displacement reaction I understand that the more reactive metal essentially takes the place of the less reactive metal. But I can't seem to understand how this more reactive metal can break the ...
0
votes
0
answers
60
views
Calculating ionic strength at different concentrations
Zn$^{2+}$ reacts with a molecule, B, in a solution at several different concentrations of NaCl.
Determine the charge of the biomolecule and k$_0$ (second order) (assume that Zn$^{2+}$ does not ...
- 1,085
1
vote
1
answer
399
views
Do both phosphoric acid and sulphuric acid prevent oxidation of ferrous ion in iron titration?
For the Determination of iron by Redox Titration experiment, I am finding the role of sulphuric acid and phosphoric acid. Then I found that other than $\ce{H3PO4}$ masks the yellow color of $\ce{Fe^3+}...
- 21
-4
votes
2
answers
88
views
What happens during a displacement reaction? [closed]
When Zn metal is added to a solution of Cu(II)SO4, Zinc displaces Cu to form ZnSO4 as Zn is more reactive than Cu. What I don't understand is how.
1- What I'm assuming is: Zn metal collides with [SO4]...
- 5
-1
votes
1
answer
76
views
Calculating the Hopping distance in K+ F- bonds
[![enter image description here][1]][1]
This is a graph showing the formation of K+ F- ionic bonds. To my understanding, when the atoms are far apart, their neutral state is more stable. But when they ...
- 7
4
votes
2
answers
307
views
Why aren't ionic crystals stronger than diamond?
If ionic bonds are stronger than covalent bonds, then why aren't ionic crystals stronger than diamond, which is bonded by covalent bonds?
Diamond has tetrahedral structure with carbons forming ...
- 59
0
votes
1
answer
241
views
Balancing a chemical reaction with oxidation numbers
We have been teached how to balance chemical reactions with oxidation numbers in school, but somehow I can't understand it.
This is the equation to balance
$$\ce{Cu(s) + NO3−(aq) + H+(aq) -> Cu^2+(...
- 9
0
votes
1
answer
293
views
Impurities in household baking soda
For a long time, I have been using store bought baking soda (with sodium bicarbonate as the sole ingredient listed) as the sodium bicarbonate in my (qualitative) home experiments, but recently I ...
- 47
2
votes
0
answers
176
views
What is the structure of sodium chloride in the liquid state?
I understand that sodium chloride when solid, is a lattice, so NaCl there is an empirical formula,(so, expresses that the ratio of Na to Cl is 1-1), and not a molecular formula expressing exact ...
- 501
-2
votes
2
answers
561
views
Why are group 13 compounds in the +1 oxidation state more ionic than those in the +3 oxidation state?
I know that for group 13 metals in the p block, the stability of +1 OS is generally more than the stability of +3 OS as it is energetically not favourable to attain the higher OS of +3 and such ions ...
user120098
-2
votes
1
answer
44
views
Why does $\mathrm{NO_3}$ have charge $1-$? [closed]
I'm given the following problem:
Write the molecular equation for the reaction $\mathrm{Iron\;(III)\; Nitrate\; and\; Sodium \;Phosphate}$
I begin by attempting to determine the empirical formula of ...
- 107
-1
votes
1
answer
180
views
What are the Ionic Properties of Co-ordinate Covalent Bonds? [closed]
In my 10th grade book, it says that
A coordinate bond has properties of both covalent and ionic bonds. Therefore, it is also called dative or co-ionic bonds.
I understand that it has properties of ...
1
vote
1
answer
55
views
Isn't my book doing this problem about ionic product wrongly?
Problem:
After adding a $\pu{150 mL}$ $\pu{6.7\times10^{-5} M}$ $\ce{NaOH}$ solution to a $\pu{100 mL}$ $\pu{2.5\times10^{-5} M}$ $\ce{FeCl2}$ solution, green colored $\ce{Fe(OH)2}$ precipitate is ...
user60158
0
votes
1
answer
174
views
If bond types are in reality intermixed, how come different bonds form completely different structures?
According to the bond triangle, compounds don't exist as solely ionic or solely covalent, but rather have ionic, covalent, and metallic character to them. So each bond type is connected and similar in ...
-1
votes
1
answer
56
views
Dissolution of ionic compounds
Where can I find a table that lists the rates of dissolution of common ionic compounds like sodium chloride, potassium permanganate, and ammonium nitrate? Are there tables and equations that relate ...
- 1