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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Why do increasing concentrations of zinc chloride not linearly decrease the freezing point?

I did an experiment on how different concentrations of $\ce{ZnCl2}$ affect the freezing point of demi water. My results were that till a concentration of about $10\ \mathrm{mol\,dm^{-3}}$ the freezing ...
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Can a organic compounds such as hydrocarbons contain an ionic bond?

Can organic compounds like hydrocarbons have types of bonds other than covalent bonds? Can they also possess ionic bonds?
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What is the most stable oxide of Fr?

I read that the heavier alkali metals, like K, Rb, and Cs all prefer to form superoxides. Since Fr is the heaviest alkali metal, I assumed it would follow the same trend as the previous alkali metals, ...
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Why doesn't a fractured salt crystal stick back together? [duplicate]

If you crack a large crystal of a salt like NaCl, why don't the pieces spontaneously bond back together on contact? The bonding is an exothermic process and the charged ions are presumably stuck ...
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Naming of ester alkoxide

I'm trying to name the following compound: I believe the carboxyl group has priority and should make up the parent name. I'm not sure how to name the alcohol derivative portion. My first thought is: ...
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What is the name of the chemical compound: Cr(CO3)3?

Cr(CO${_3}$)${}_3$ This is an ionic compound. Chromium is a transition metal cation and CO${_3}$ is an anion with a charge of 2-, as said in my chemistry textbook. And since CO${_3}$ has a charge ...
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Would distilling a sodium fluoride solution generate hydrogen fluoride to any noticeable extent?

If you have a solution of NaF, and you boil it (to get pure water by distillation) can the fluoride ions in water separate from sodium ions and combine with hydrogen ions to form HF? ...
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Electrolysis of Anhydrous Sodium Hypochlorite

Considering liquid anhydrous sodium hypochlorite: $$\ce{NaClO (l)}$$ Assuming the ions are free, What would be produced if this were electrolysed? As I've found lots of information for it's ...
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How to balance chemical equations with polyatomic ions [closed]

I know that you can not split poly-atomic ions but I am confused on how to balance the following equation: 9PbSO4 -> 10PBSO3 + 3O2 Pb = 9 Pb = 10 S = 9 S = 10 O = 36 O = 36 Obviously the ...
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In my homemade electrolysis setup, only the negative end bubbles?

I've created an electrolysis setup by connecting a $6~\mathrm{V}$ battery to a cup filled with saline water via pencils; I am confused as to why only the negative pencil bubbles though. After running ...
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What kind of unit is this [A*m^2/mol]?

I found a term on this website that gives a unit of [A*m^2/mol]. The equation is: $k_d^{eff}=\frac{2RT\kappa^{eff}}{F}(t^+-1)\left(1+\frac{\text{d}\ln(f)}{\text{d}\ln(c)}\right)$ where R is the gas ...
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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 ...
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Why did my iron nails not dissolve in hydrochloric acid?

I was trying to dissolve iron metal in HCl to make iron chloride, but ran into some problems. I'll give a brief background of my experiment. I took iron nails and put them in a container filled with ...
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How would one compare the magnitude of covalent character between SnCl4 and SnF2 using Fajan's Rules?

It is easy to compare two ionic compounds when one of the ions is same. However, how do we compare two compounds if one of the ions is the same element but just has different charge and the other ion ...
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Nomenclature of polyatomic ions

Is there a way to remember polyatomic ions (i.e $\ce{PO4^{3-}}$, $\ce{SO4^{2-}}$ etc.). For example, our professor will ask on an exam what the equation for iron (III) carbonate. Obviously the (III) ...
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Clarification on Oxidation Number and Ionic Charge

I am confused on the differentiation between ionic charge and oxidation number (state). For example and simplicity, $\ce{NaCl}$ is an ionic compound so it forms $\ce{Na+}$ and $\ce{Cl-}$. Are these (...
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How did Halogens become known as Halogens? They are not the only elements that form salts!

Having never given it a though before, I recently discovered (in a different context) that the prefix halo- actually means 'salt' or 'sea' and the suffix -gen means 'to form' or 'to generate'. So the ...
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What is the correct name for this lab technique in crystallization?

Take a glass rod and rub vigorously the wall of the flask, the substance will crystallize out of the solution. Take a fire polished stirring rod and etch (scratch) the glass of your beaker. The small ...
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Intercalation and Ionic Bonds

What I know: Coming from a physics background and a frequenter of more glib stack exchange sites, I only recently found out that intercalation is a thing when studying Lithium-Ion Batteries. As I ...
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Why do ionic compounds dissociate whereas coordinate complexes won't?

An ionic bond is the bonding between a non-metal and a metal, that occurs when charged atoms (ions) attract after one loses one or more of its electrons,and gives it to the other molecule, for example ...
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Ionic compound gases

Does any molecule containing only ionic bonds exist as a gas in room temperature? In the case of carbon dioxide, it is a covalent molecule which is a gas at rtp. Does the same apply for ionic ...
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Alkalide compounds

I have read much more about metallic hydrides but I am totally confused about "inverse alkali hydrides" or "hydrogen alkalides" while reading refer to this. What are these compounds and how do they ...
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Is KHF2 an ionic compound or a covalent compound?

The statement below is an excerpt from my school textbook:- Because of the tendency of fluorine to form hydrogen bond, metal fluorides are solvated by $\ce{HF}$ giving species of the type $\ce{...
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Why does NaCl dissolve in H2O despite its strong ionic bond? [duplicate]

If $\ce{NaCl}$ is such a strongly bonded ionic compound, why it does it disassociate so readily in $\ce{H2O}$? One would think that because of the very strong ionic bond it would not disassociate it ...
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Is Fe(OH)3 a salt or an alkali?

I know that a neutralization reaction (i.e. a reaction between an acid and a base) results in the formation of a salt and water, but when I came to know that $\ce{Fe(OH)3}$ is salt, I began to have ...
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Is there a word for a compound that has both ionic and covalent bonds?

For example, calcium carbide (CaC$_2$) has covalent C‒C bonds and ionic Ca$^{2+}$‒ C$_2^{2-}$ bonds.
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Type of reaction between metal and salt

What type of reaction is the following? $\ce{ 10Na(l) + 2KNO3 (s) -> K2O(s) + 5Na2O(s) + N2 (g)}$ So far my best guess has been that it's a double replacement reactions with evolution of gas. Is ...
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How to recycle 60 tons/hour of CaCO3?

I hope this is the right place to ask. I'm not a chemist so my question may seem obvious but it's not for me. I work in the egg industry and we produce every hour 60 tons of dried egg shells as waste....
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Ionic compounds dissolve in nonpolar compounds?

I think ionic compounds dissolve in just about any compound including nonpolar. My reasoning is this: Neutral electric charge attracts both positive and negative (This I know from doing things with ...
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Why does an anion not only bind to a single cation?

When $\ce{Na}$ binds with $\ce{Cl}$ to form $\ce{NaCl}$, why does the Na bind with multiple $\ce{Cl}$'s and not only one? A Na-ion is positively charged due to donating an electron and a $\ce{Cl^-}$...
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Naming of hydroxides

In naming of compound, for example in strong base; KOH and $\ce{Ca(OH)2}$ have different formula, in potassium hydroxide, one hydroxyl group is attached while in calcium hydroxide two hydroxyl group ...
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About ionic bonds (and ionic compounds) [closed]

I have a few questions: All ionic bond occurs between a metal and a non-metal. Is this true? In the definition of metal and/or non-metal are the metaloids included? In the definition of non-metal are ...
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Are non-ionic compounds generally as dehydrating as ionic compounds in drinking water?

In order to turn sea water into drinkable water, virtually all of the salt must be removed. By definition, salts are ionic compounds. I am assuming that there are other non-ionic compounds devolved ...
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How to distinguish between CsCl and NH4Cl by a chemical test?

$\ce{CsCl}$ and $\ce{NH4Cl}$ have similar reactions. For example, they can react with $\ce{AgNO3}$ to produce $\ce{AgCl}$ precipitate. So my question is: Can we use a chemical test to distinguish ...
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Shapes of ionic compound

Can anyone explain the shapes of ionic compounds? What does it mean? What does the coordinate number mean? I know that in $\ce{NaCl}$, one $\ce{Na}$ atom is surrounded by 6 $\ce{Cl}$ atoms, and vice ...
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Melting point of ocean salt: eutectic?

I'm interested in the melting point of ocean salt. While sodium chloride has a melting point of 801 °C, ocean salt contains 15 % other ions, mainly sulphate, magnesium, calcium and potassium (the ...
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Barium sulfide vs Ba2S2

I was predicting a very simple chemical equation $$\ce{Ba + S ->}$$ And I had solved it as $$\ce{Ba + S -> BaS}$$ The answer should make sense as barium has a charge of +2, and sulfide has a ...
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Why is MnO2 not a peroxide?

As I know, $\ce{MnO2}$ is called manganese(IV) oxide. Why can't we name it manganese peroxide since manganese(II) exists too? In other words, how do we know that the oxidation number of manganese in ...
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How to make γ-MnO2 in a lab?

I am working on Li-ion batteries, and I need to use γ-$\ce{MnO2}$ (electrolytic manganese dioxide). I have googled and read quite a few papers, but I am not very sure of those methods. I'd love ...
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How to estimate the equilibrium constant of the reaction between NaF and HCl

Since $\ce{HCl}$ is more acidic than $\ce{HF}$, the left hand side of a reaction has a stronger acid than the right hand side. Since $\ce{NaF}$ is more basic than $\ce{NaCl}$, the left hand side has ...
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Why does Cu(OH)2, which is generally insoluble due to low Ksp become soluble in excess of a base, such as NaOH?

Where does the "excess" criteria come into the picture? Also, can the equilibrium $$\ce{Cu^2+ + 6 H2O <=> [Cu(H2O)6]^2+}$$ participate in the solubility process in any case? So there are 2 ...
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Why does KCl come in amber coloured bottles?

I remember from school that photosensitive chemicals are kept in amber coloured bottles. Is KCl photosensitive? I read up the impurities list on the bottle and it says that it may have bromides too? ...
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Can polyatomic ions (CO₃, PO₄, SO₄, NO₃) be considered conjugated systems?

From my perspective these resonance structures allow these specific polyatomic ions to act as donor-acceptor molecules. Many donor-acceptor molecules also tend to be conjugated systems because they ...
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What is the colour of chromium(III) chloride solution?

I had a question asking about the colour of the solution of chromium(III) chloride in my exam, all my colleagues have different answers, I couldn't find any exact answer after searching!
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Does the activity product decrease with increasing ionic strength?

I have a question regarding what happens to the solubility of $\ce{CaSO_4}$ or the rate that $\ce{CaSO_4}$ will dissolve when we add $\ce{NaCl}$ to the solution: $\ce{CaSO_4}$ will dissolve into $\...
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AlCl3: ionic and covalent?

My textbook states that AlCl3 is both an ionic and a covalent compound .How is it so?
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Why are the ozonides of heavier elements more stable?

The ozonides of $\ce{Cs}$, $\ce{Rb}$, $\ce{K}$ are well known and relatively stable, but there is little mention of the ozonides of $\ce{Na}$, $\ce{Li}$. Why is this?
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Why is MnSO4 colourless?

I get it that transition metal salts have colour due to d-d transition from $\mathrm{t_{2g}}$ to $\mathrm{e_g}$ orbitals in octahedral and the opposite in tetrahedral but why would $\ce{Mn^2+}$ not ...
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What will be the reaction between tin (II) chloride and copper (II) chloride?

I just tried conducting an experiment during lunch today. Now, I calculated this reaction 4 days ago dealing with electrochemistry, $$\ce{SnCl2 + CuCl2 -> Cu(s) + SnCl4}$$ Theoretically, I got ...

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