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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1answer
12k views

Does water ionically bond to chloride ion?

This user absolutely insists that when a chloride ion is present in water (for example, when $\ce{NaCl}$ dissolves in water) that $\ce{Cl-}$ ion is ionically bound to the hydrogen atom: https://...
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Is F2 two fluoride ions or just one?

I'm attempting to write the balanced equation of the combination of lithium metal and fluorine gas. I understand that this will produce an ionic solid because it is a reaction of a metal and a ...
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265 views

Smoke alarm ion neutralisation

Smoke alarms are a necessary part of many modern day buildings, especially in laboratories and of course, the family home. According to the World Nuclear Association page Smoke Detectors and ...
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1answer
2k views

Chemical bonding - lattice energy

Question: Why is ionic lattice energy inversely proportional to the radius of the atom? Most heterogeneous covalent molecules are polar to some extent. The degree of polarity, or the dipole moment, ...
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1answer
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What types of chemicals/ionic liquid could perform this type of separation? [closed]

Ionic Liquids separation of oil and sand.
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1answer
843 views

Why do ionic solids change to a structure with a higher coordination number at high pressures?

This seems counter intuitive to me since ionic radius increases with increasing coordination number. Surely the solid doesn't expand under high pressure? Can you explain?
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1answer
70 views

Solubility determination of Ca(OH)₂ in water

In one problem it's asking me to find the solubility of $\ce{Ca(OH)2}$ in water. In that problem it assumes the starting concentration $\ce{OH}$ to be zero. But for other problems like $\ce{BaSO4}$ in ...
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1answer
548 views

What is the meaning of "superionic"?

I see the term "superionic" applied to high pressure water in articles like Giant planets may host superionic water, but I don't understand what the term really means. How is "superionic" ...
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1answer
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Is sodium hypochlorite solution an ionic solution - does it conduct current?

Does an aqueous solution of sodium hypochlorite conduct current?
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Why does Mg2+ have the ionic radii bigger than Ca2+

If they were atoms, $\ce{Mg}$ should have a smaller radii. How does this change?
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2answers
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Comparing the nature of ionic compounds

I want to know how to compare the strength or stability of ionic compounds. Example : $\ce{Mg(HCO3)2}$ and $\ce{NaHCO3}$ I know that polarity and polarizability affect the ionic and covalent nature.
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1answer
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Comparing the strength of metallic bonds

Why is the boiling point of iron higher than magnesium?
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1answer
933 views

X[Y|Z] formulas

I often find formulas of minerals where some element symbols are grouped within square brackets and separated by a vertical bar. An example can be brochantite, whose formula I find expressed as $\ce{...
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1answer
256 views

Is table salt sticking to my laptop?

I was reviewing first posts here, and eating a juicy and salty (table salt) tomato at the same time. Suddenly, I realized that a few table salt crystals have been poured down on my mousepad. I got ...
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Are there any ionic amorphous solids?

This question on NaCl crystalization actually got me wondering: are there any ionic amorphous solids? Like ionic crystals are crystalline materials of electrostatically-attracted ions, can ions form ...
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Why is PbCl₄ covalent?

My answer: The inert pair effect in $\ce{Pb}$ causes it to pull back the electrons, resulting in polarisation. My teacher's answer: An ionisation state of $+4$ is too difficult to achieve, and it is ...
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1answer
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Why are electrons transferred in an ionic bond?

I've been taught at school that in an ionic compound like $\ce{NaCl}$, electrons are transferred from the $\ce{Na}$ to the $\ce{Cl}$ to form $\ce{Na+}$ and $\ce{Cl-}$ which both have full outer shells....
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1answer
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How do we experimentally know the strength of bonds?

How do we experimentally measure the strengths of covalent versus ionic bonds? Also, for a given molecule, how can we know if two pairs of atoms is covalently or ionically bound? Related question: ...
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2answers
2k views

Ionic or covalent bond

Which bond is stronger, ionic or covalent? I have a lot of confusion about this.
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5answers
29k views

Why does a Fluoride ion only have a -1 charge and not a -2 charge or more?

Transition elements can form ions with different charges. Why can't elements other than transition elements form ions with different charges? If it is a Fluoride ion, why does it have to be an anion ...
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1answer
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What is Sodium Chloride like in gas state?

Since sodium chloride is sodium and chlorine atoms bonded as a lattice and there are no discrete molecules, doesn't that mean in gas state, sodium chloride is simply sodium and chlorine atoms separate ...
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1answer
6k views

Why is Aluminium Chloride a Lewis Acid if it's an ionic compound?

In my textbook it says in the reaction $\ce{AlCl3 + Cl- -> AlCl4-}$, Aluminium Chloride ($\ce{AlCl3}$) has six valence electrons and accepts a lone pair from $\ce{Cl-}$, but wouldn't that mean the ...
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3answers
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The Crisscross method for finding the chemical formula

I am reading this wikipedia article that I don't understand. What I don't understand is: suppose we have two elements $X$ and $Y$ having oxidation numbers $x$ and $y$ respectively. Can we prove ...
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1answer
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Ionic Strength of 0.1M of HEPES?

HEPES, the buffer, has the chemical formula $\ce{C8H18N2O4S}$. Using the Ionic Strength formula from Wikipedia. I have calculated that $0.1M$ of HEPES would have a strength of $1.7M$, would it be ...
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2answers
857 views

How to identify ionic compounds

I have a Chemistry lab in which I must design and carry out an experiment to determine the compound in each of eight numbered vials. Each vial contains one of these ionic compounds: BaCl2 CaCO3 Ca(OH)...
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2answers
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How are pure substances (elements, compounds, etc) produced? [closed]

How are large quantities of the substances we use in the lab generally produced? (As in the process from getting the stuff out of the ground to use in the lab) How 'pure' are they? Also: is it ...
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1answer
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How to determine stable electron states in ionic and covalent bonds?

I'm working on a program that needs to determine if a bond between two or more elements will result in a stable state. I understand at a high-level how to fill electron subshells using the Aufbau ...

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