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.
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Are Fajans rules relevant to melting and boiling points of alkali metal hydrides?
Among LiH, NaH, KH, RbH, CsH the one with the highest melting point is LiH, and it keeps on decreasing till CsH. The reason for this in my textbook is that the size of cations keeps on increasing down ...
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In a crystal of NaCl, how are the NaCl molecules bonded to other NaCl molecules?
I understand that the sodium and chlorine in an individual NaCl molecule are bonded ionically, but how are the molecules in a crystal containing millions of these molecules bonded to eachother?
I'm ...
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How to Derive the Born-Mayer Equation?
Born-Mayer Equation: $E_{P,min}=-A\frac{N_A|z_1z_2|e^2}{4\pi\varepsilon_0d}(1-\frac{d^*}{d})$
Here is where I have gotten:
$$
E_P=-A\frac{N_A|z_1z_2|e^2}{4\pi\varepsilon_0d}, E_P^*=N_AC'e^{-d/d^*}\\
$$...
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Does chromium chromate — Cr₂(CrO₄)₃ — exist?
Is it possible to synthesise chromium(III) chromate/dichromate? The intended formulas are $\ce{Cr2(CrO4)3}$ and $\ce{Cr2(Cr2O7)3}$ and they feature both trivalent and hexavalent chromium. However, ...
user144956
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Could ammonium azanide exist?
In my first high school chemistry class, I misremembered nitrate as being $\ce{NH2-}$, rather than $\ce{NO3-}$, and wrote down a formula for "ammonium nitrate" that was $\ce{NH4NH2}$ (rather ...
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I have fabricated a starch film impregnated with calcium carbonate, and the film is showing hydrophobic behaviour after addition of calcium carbonate
I have fabricated an extruded starch film, impregnated with calcium carbonate. After addition of calcium carbonate the contact angle of the film has risen suggesting a more hydrophobic surface. I have ...
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How to name LiN(CF2SO3)2?
I found this compound in the list of inorganic lithium salts from this article on ScienceDirect.
It is said to be of the sulfonate group. Let's focus on the anion alone.
I'm not sure if it can be bis(...
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Making an UV inactive salt UV active during purification of charged anion with HILIC purification?
In the context of a purification setup I am asking myself the question: Can a UV inactive charged substance made be UV active by a counter ion that absorbs UV light during a column run?
If so, when no ...
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How to determine the dynamic of progression of two simultaneous precipitation (double replacement) reactions? [duplicate]
We have a solution of mineral water with potassium chromate added to it, and want to titrate the chloride ions in the mineral water. We were told to use silver nitrate for this, which would produce ...
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How would the regions of this graph showing percentage of ionic character, be classified? [closed]
Looking here at this website - Omnicalculator, at the section of the website for calculating percentage of ionic character. Omnicalculator - Percentage Ionic Character
They let you choose elements and ...
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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 ...
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How do you perform an ion exchange of a monovalent cation with Br- counterion to a divalent or trivalent anion?
I tried to react an organic compound I have synthesized containing a di-N substituted imidazole bromide salt with Ag3PO4 with water at room temp to try to replace the Bromide with PO4(3-). I dont ...
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Chemistry of Rutile, CdCl2 and CdI2
During lectures, we were told that 3d transition metal fluorides generally prefer a rutile structure. Chlorides prefer a $\ce{CdCl2}$ structure where $\ce{Cl-}$ adopt a CCP lattice and the metal ...
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Ionic bond formation [duplicate]
When two separate pieces of sodium chloride crystals are physically put together, no wonder that they will not fuse with each other.
But I don’t understand why. Ionic bonds are described to be non-...
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Reduction of di-N-substituted imidazole to imidazoline to remove counterion?
I would like to synthesize a di-N-substituted imidazole (compound 4) in its free base form or reduce it to generate an imidazoline (compound 5) to remove the bromide counterion to the imidazole ring.
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Why is the statement regarding the strength of ionic bonds reasonable? [closed]
In largely ionic compounds (e.g. NaBr and NaI), it seems to be generally true that, the greater the differences of electronegativity between the forming substances (i.e. The compound has more "...
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Is mercury(I) chloride ionic or covalent?
Is mercury(I) chloride ionic or covalent? If I look here, I see arguments either way. The article doesn't mention anything about a cation or an anion.
Some might think there's two mercury ions each 1+ ...
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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 ...
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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 ...
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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.
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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 ...
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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 ...
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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, ...
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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 ...
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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.
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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....
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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:
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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 ...
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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?
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Can ionic and/or metallic bonding produce stable long chains? Like polymers, though not necessarily as useful [closed]
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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 ...
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