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 aren't the copper(II) ions in CuSO4 precipitated by hydroxide ions from water?

From my own experience and literature, I know that $\ce{CuSO4}$ is well soluble in water and dissociates into $\ce{Cu^2+}$ and $\ce{SO4^2-}$. $\ce{Cu(OH)2}$, however, is not: $K_\mathrm{sp} = 2 \cdot ...
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MgCl2 acidic or neutral in water?

I'm currently taking chemistry 12. On our test we were asked, when given a $0.1~\mathrm{M}$ solution of certain compounds whether the resulting solution when added to water would be acidic, basic, or ...
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How to clean copper(II) sulfate crystals from sulfuric acid?

I am going to prepare copper(II) sulfate by electrolysis with sulfuric acid for crystal growing. How would I separate the copper(II) sulfate from the sulfuric acid left over from the electrolysis ...
featherbits's user avatar
8 votes
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Continuous flow mass spectrometer for isotope analysis

If i took thousands of discrete samples of mineral fragments in a field study using a specialized drill, what mass-spectrometry techniques/equipment would allow me to analyse the samples as fast as ...
bandybabboon's user avatar
1 vote
2 answers
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What determines whether a double displacement reaction will occur?

In normal displacement reactions, reactivity plays a large role and sometimes the reaction doesn't even happen. So is there anything limiting double displacement reactions? For example $\ce{2KI + Pb(...
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Do I need to include lattice energy when calculating the energy required to vaporize NaCl?

I understand that the lattice energy is the energy released when a crystal forms and that's the reason it takes the negative sign. But do we need to add this energy again when we are trying to ...
Abanob Ebrahim's user avatar
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What is the geometrical structure of Pb3O4?

I'm confused by the structure of Pb3O4. There are some sites claiming that it is a six membered ring of alternating Lead and Oxygen atoms with another Oxygen atom in the center bonding with 2 out of ...
Aritra Das's user avatar
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Is potassium bifluoride an ionic or a covalent compound?

The statement below is an excerpt from my textbook (Chemistry Part II, Textbook for Class XII by NCERT, ed. January 2014): Because of the tendency of fluorine to form hydrogen bond, metal fluorides ...
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Has a carbon compound ever been found having an ionic bond?

Though it is highly unlikely, has any carbon compound been found to make an ionic bond and to exhibit ionic properties?
Harshit Garg's user avatar
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what is the difference between a redox reaction and an ionic bond? [closed]

I am new into chemistry... I'd like to know what the difference is between an ionic bond: which involves a bond with an electron transfert, and a redox reaction; which seems to be exactly the same to ...
privetDruzia's user avatar
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Why does silver sulfate not precipitate in this double displacement reaction?

Aqueous silver nitrate is mixed with aqueous sodium sulfate. We were asked to perform this reaction in lab in my chemistry class, and we did not observe a precipitant being formed. However, the ...
vasilescur's user avatar
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Water: What to use H3O+ or H+? [duplicate]

Why can we use $\ce{H+}$ and $\ce{H3O+}$ interchangeably? I have seen in many places that first the reaction is written including Hydronium ion but then in bracket its written that we can write it as ...
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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 magnesium oxide not react with water?

There is a question in my textbook which asks "which of the reactions are not possible to occur". The right answer is $\ce{MgO + H2O}$ and my chemistry teacher confirmed it. Why is that so? I thought ...
Angelina's user avatar
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Intermolecular Forces for Ionic Compound?

So in class we have learned London dispersion, dipole-dipole, ion-dipole and hydrogen bonding for intermolecular forces. Our teacher always uses covalent molecules as examples. So I was wondering ...
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Chemical bond at Aluminum / Aluminum oxide interface

I am trying to find out what chemical bond holds aluminum oxide to the aluminum on which it forms. The only information I was able to find on the internet was in a Google book which suggested that the ...
William Howard's user avatar
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1 answer
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Calculating solubility in water with other species present

I'm very confused about calculating solubility. Everything is in temperature of $298\ \mathrm K$ From Atkins's book, exercise 16.83: Based on solubility constant, calculate solubility of $\ce{Al(...
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Why do elements change their colour in reactions?

We are almost common with the reaction: $\mathrm {CuSO_4+Fe = FeSO_4+Cu }$. In this reaction initially Copper sulphate is bluish in colour, which gradually changes to pale green. I want to know, why ...
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Few basic questions about ionic bonding and batteries (lead)

I've got a few very very basic questions about ionic bonds and their role in batteries. My assumptions (correct me if I'm wrong): Ionic bonds occur between a metal and a non-metal (the non-metal ...
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Produce CuCl2 from CuSO4

I have a large amount of copper sulfate available and I am interested in obtaining copper chloride from it. What is the easiest way to do so? I have considered mixing an aqueous solution of copper ...
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When Compounds are Considered Compounds and Their Types [closed]

I'm a bit new in chemistry, so I need help with a couple of things. Although I don't mind complicated answers, please try to keep it around high school level, and not rocket science. Thanks! Can ...
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Why do different elements form different types of carbides?

What property of the elements make them form different types of carbides like: $\ce{Be}$ and $\ce{Al}$ - $\ce{Be2C}$ and $\ce{Al4C3}$ (Methanides) contains $\ce{C^4-}$ ion $\ce{Na}$ and $\ce{Ca}$ - $...
Nilay Ghosh's user avatar
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3 votes
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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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Why are so many ionic compounds brittle?

Even when ionic compounds are strong (e.g. rubies and sapphires), they are neither malleable nor ductile in the slightest, and if sufficient stress is put on them, they will shatter, not bend. Why is ...
Breaking Bioinformatics's user avatar
1 vote
2 answers
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Calculating valence of oxides

Learning about Oxides. Basically when oxygen is combined with a metal. $$\ce{FeO}$$ This is called "Iron Oxide (II)" according to my book. Apparently, the II represents the valence. But how come? ...
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Can negative (abnormally) lattice enthalpies during the formation of ionic compounds exist?

Why do compounds form bonds? I've got three words for you: Less potential energy. I don't remember a case of positive lattice enthalpies $\ldots$ - My comment This makes me wonder. I remember seeing $...
M.A.R.'s user avatar
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13 votes
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Is an ionic bond more like a covalent bond or an intermolecular force?

I have asked a question loosely asking this, where I confused terms and did not specify what I wanted to know here, so I formed a new question. What are the differences and similarities between ionic ...
Dylan Spano's user avatar
28 votes
1 answer
29k views

Are all NO3- salts soluble in water? If so, why?

All the examples of $\ce{NO3-}$ salts are soluble in water (all that I know about). Is it always so or there is some salt which doesn't dissolve in water? If so what is the reason behind it?
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Will selenium react or bond, ionic or covalent, with vanadium?

I was recently asked if $\ce{Se}$ will bond with $\ce{V}$, creating a compound $\ce{SeV}$ . I am not sure if this is even possible but if so I'd like to find out.
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Can 100% covalent bonds exist?

Every covalent bond has some ionic character and every ionic bond some covalent character. I can understand why a completely ionic bond is an ideal situation. But completely covalent bonds can exist(?)...
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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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2 votes
4 answers
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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 ...
Sebastian Dupont's user avatar
7 votes
1 answer
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Naming ionic compounds with multiple cations and anions

I have seen complex ionic compounds that have mixed anions and/or mixed cations. For Example I have seen this: $$\ce{NaKCl2}$$ Also known as Sodium Potassium Chloride. The only information I can ...
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9 votes
1 answer
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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 ...
user avatar
4 votes
2 answers
24k views

What is the net ionic equation of sodium hydroxide when it dissolves in water?

What is the net ionic equation of sodium hydroxide when it dissolves in water? For the net ionic equation I got $$\ce{NaOH(s) + H2O(l) -> NaH+(aq) + OH- (aq) + H2O(l)}$$ but it was wrong. Then ...
jeterpaul's user avatar
9 votes
1 answer
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Compounds that adopt the zincblende structure

Zinc sulfide, copper iodide and copper bromide all adopt the zincblende structure. My lecture notes suggest that this structure is adopted preferentially over the wurtzite structure if the bonding is ...
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How to write equations for dissociation of ionic compounds in water?

Please write a dissociation-in-water equation for the compounds $\ce{BeI2}$ and $\ce{LiI}$. Make sure to add the states of matter after each compound. Currently, for $\ce{BeI2}$ I have the equation $$...
Bob Umadbro's user avatar
-3 votes
1 answer
92 views

What types of chemicals/ionic liquid could perform this type of separation? [closed]

Ionic Liquids separation of oil and sand.
Dale's user avatar
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1 answer
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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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Why are transition metal hydroxides insoluble?

From what I understand, adding $\ce{NaOH}$ to a solution containing transition metal ions gives transition metal hydroxide precipitates. Why is $\ce{NaOH}$ soluble but transition metal hydroxides ...
Meep's user avatar
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3 votes
1 answer
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How can ionic substances have an infinitely-repeating lattice structure?

The title's pretty much it. At school, we're taught that ionic substances are composed of an infinitely-repeating lattice, with atoms at fixed angles from other atoms. How is this possible when I can ...
drunkBrain's user avatar
1 vote
1 answer
86 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 ...
Caesium-133's user avatar
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Is sodium hypochlorite solution an ionic solution - does it conduct current?

Does an aqueous solution of sodium hypochlorite conduct current?
docscience's user avatar
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12 votes
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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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2 votes
4 answers
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Equation for salt formation for ammonium oxalate?

I'm having trouble finding out the salt formation equation for $\ce{(NH4)2C2O4}$ I thought it was $\ce{NH3 + H2C2O4}$ but that doesn't seem to balance out. $\ce{HC2O4-}$ seems to work, but are ions ...
quidproquo's user avatar
4 votes
3 answers
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Can all water soluble ionic compounds conduct electricity?

I'm taking a first year university chemistry course, and I am reading a lot of contradicting things. Some people say that ionic compounds that are soluble in water are always electrically conductive, ...
Arden's user avatar
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20 votes
2 answers
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Salts that are more hydrophilic than NaCl

What other, rather easy to obtain, salts are more hydrophilic than $\ce{NaCl}$? Is there a hydrophilic scale for substances like the Mohs scale of mineral hardness?
Liviu-Aurelian Rau-Neacsu's user avatar
1 vote
1 answer
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How does one measure the change in enthalpy of hydration?

I am learning about lattice enthalpies, and my textbook talks about determining the lattice enthalpy from the standard change of enthalpy of solution and the change of enthalpy of hydration of the ...
Meep's user avatar
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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?
user13411's user avatar
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1 vote
2 answers
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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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