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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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 ...
Kshitij Madhu's user avatar
2 votes
1 answer
144 views

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(...
Blacklight MG's user avatar
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Solubility of CsCl

I was just learning in analytical chemistry about classical cation separation and in the $\ce{HCl}$ group I was wondering why $\ce{CsCl}$ is apparently easily soluble in water when $\ce{AgCl}$ ...
Selenimoon's user avatar
2 votes
1 answer
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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 ...
raptorlane's user avatar
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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 ...
Abdelhadi Bouziani's user avatar
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1 answer
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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 ...
barlop's user avatar
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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 ...
Young Jun Lee's user avatar
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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 ...
user85426's user avatar
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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-...
Freeby Freeby's user avatar
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Is polarizing power related to solubility, melting point of a compound? [closed]

It is stated in this websites that "It is found that the greater the possibility of polarization, the lower is the melting point and heat of sublimation and the greater is the solubility in non-...
Seiji's user avatar
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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. ...
toodles's user avatar
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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 "...
蕭力諶's user avatar
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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+ ...
barlop's user avatar
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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 ...
Bobs's user avatar
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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 ...
H. Weirauch's user avatar
4 votes
1 answer
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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. ...
Walter Heisenberg White's user avatar
1 vote
1 answer
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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 ...
izack's user avatar
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-2 votes
1 answer
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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 ...
Henrik Hillestad Løvold's user avatar
4 votes
6 answers
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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, ...
Chemistry Boi's user avatar
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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 ...
Krang Lee's user avatar
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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. ...
Mister Sir's user avatar
4 votes
1 answer
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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....
Aditya Kumar Panda's user avatar
2 votes
1 answer
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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: ...
Njw96's user avatar
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-4 votes
1 answer
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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 ...
Chemistry's user avatar
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-2 votes
2 answers
233 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?
Rohit P L's user avatar
-2 votes
1 answer
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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 ...
Aseku Vena's user avatar
3 votes
1 answer
246 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 ...
Tanner Nelson's user avatar
1 vote
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190 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 ...
Ravindu's user avatar
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2 votes
1 answer
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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 ...
Shub's user avatar
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1 vote
0 answers
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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 ...
toodles's user avatar
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19 votes
3 answers
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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" ...
Tom P's user avatar
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1 answer
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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+ ...
Zeit Shpaga's user avatar
-2 votes
2 answers
87 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 ...
airplantlover's user avatar
1 vote
1 answer
2k 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 ...
Man's user avatar
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2 votes
3 answers
324 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 ...
Adam Herbst's user avatar
1 vote
0 answers
174 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< ...
Pumpkin_Star's user avatar
3 votes
1 answer
187 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 ...
Jono94's user avatar
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1 vote
0 answers
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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 ...
Abdullah's user avatar
0 votes
1 answer
2k 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+ ...
Abdullah's user avatar
-1 votes
1 answer
230 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 ...
blazerunner's user avatar
1 vote
1 answer
75 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 ...
Scratch Cat's user avatar
-1 votes
1 answer
559 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-...
0nelight's user avatar
4 votes
0 answers
46 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 ...
Benzen11's user avatar
0 votes
0 answers
114 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, ...
Haem's user avatar
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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 ...
Binuka Perera's user avatar
2 votes
0 answers
54 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 ...
Mc'Brainzz's user avatar
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0 answers
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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)...
Zachary Ireland's user avatar
1 vote
0 answers
74 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 ...
Asaf Shachar's user avatar
-1 votes
2 answers
124 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 ...
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