A compound in which the total number of electrons is not equal to the total number of protons, giving it a net positive or negative electrical charge.

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158 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: ...
4
votes
4answers
461 views

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 ...
4
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1answer
49 views

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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1answer
69 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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0answers
26 views

Inorganic Chemistry: Lattice energy, Madelung constant and Born Exponent

I would like to know if you can find Madelung constants in the data book and how to work out the born exponent for ionic structures such as NaCl, Its something simple but i dont know fully ...
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0answers
45 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 ...
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1answer
34 views

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 ...
-4
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1answer
44 views

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
48 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
44 views

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 ...
2
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1answer
79 views

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 ...
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1answer
31 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
31 views

Is sodium hypochlorite solution an ionic solution - does it conduct current?

Does an aqueous solution of sodium hypochlorite conduct current?
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1answer
79 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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4answers
201 views

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 ...
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3answers
668 views

Can all water soluble ionic compounds conduct electricity?

I'm taking a first yer chemistry course at University, i am reading alot of contradicting things. Some people say that ionic compounds that are soluble in water are ALWAYS electrically conductive, ...
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0answers
71 views

How to measure the enthalpy change of hydration?

I am learning about lattice enthalpies, and my text book talks about determining the lattice enthalpy from the standard enthalpy change of solution and the enthalpy change of hydration of the ions, ...
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3answers
283 views

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
38 views

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
42 views

Comparing the strength of metallic bonds

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

Solubility of gold salt solution?

I was wondering what salts of gold are soluble and which are insoluble. From what I understand, silver is soluble as silver nitrate but insoluble as most other common salts like chlorides and ...
2
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1answer
836 views

Why are ionic compounds bad conductors of electricity in solid state?

I understand the fact that ionic compounds are good conductors of electricity in molten state. But why aren't they good conductors in solid state. Cannot ions vibrate about their mean position and ...
3
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2answers
215 views

How might you use a precipitation reaction to prepare a solution of CaCO3? [closed]

My question is how to write a balanced equation and the net ionic equation for the precipitation reaction. The question also says include state symbols in your equation. Unfortunately, I am not ...
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1answer
77 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 ...
2
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1answer
59 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 ...
2
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3answers
428 views

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
91 views

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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0answers
42 views

Ionic bonds- are electrons transferred?

In an ionic bond, are electrons actually transferred from one atom to the other to form a positive and a negative ion OR are ionic bonds just extremely polar covalent bonds? Sorry if this seems like a ...
5
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1answer
961 views

Why is KF the most ionic compound?

I saw somewhere (can't recall where) that KF is the most ionic compound. I expected CsF. Does the greater polarizability of Cs allow it to more easily form covalent bonds compared to K? Does this ...
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1answer
95 views

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 ...
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1answer
88 views

How do you solve a net ionic equation without a balanced equation?

In class, my professor went over a method for finding the net ionic equation without determining the balanced equation (e.g., if finding the balanced equation was too difficult for us students). It ...
2
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1answer
4k views

Why is the bond in HF ionic while it is covalent in HCl?

Why would a hydrogen atom "donate" to Fluorine in an ionic bond but not in $\ce{HCl}$? Why would $\ce{H}$ and Chlorine share instead of $\ce{Cl}$ just stripping it away like $\ce{F}$ does?
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2answers
750 views

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 ...
2
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2answers
107 views

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 ...
2
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5answers
2k 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
5k views

Dipole moment - calculation of percentage ionic character

Question: The dipole moment of $\ce{HBr}$ is $2.60 \times 10^{-30}$ and the interatomic spacing is $1.41$. What is the percentage ionic character of $\ce{HBr}$? What I know is that the percentage ...
5
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1answer
671 views

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
197 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
846 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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1answer
399 views

Solvent for copper(I) iodide, copper(I) thiocyanate, silver iodide for HTM deposition; safety for methylammonium lead iodide

I'm a student working in a high school laboratory that is looking to pursue research into perovskite cells for next year, but I have some solubility and safety questions. What would be a good solvent ...
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4answers
6k views

Are metallic/ionic bonds weaker than covalent bonds? I was taught the opposite. Now I'm confused

In mineralogy class, I was taught that metallic and ionic bonds are weaker than covalent bonds and that's why quartz and diamond have such a high hardness value. However, in organic chemistry class, I ...
4
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1answer
2k views

Using Activities and extended Debye-Huckel equation, find the ph of the solution 0.020 M NaCl

This is from a study guide for an exam coming up. So the Question is: Use activities to calculate the pH of each of the following solutions, being sure to use $\mathrm{\alpha}$ values and the ...
0
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1answer
154 views

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 ...
2
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3answers
187 views

How do i find out which species is colourless? [closed]

Among the following $$\ce{TiF6^{2-},\ CoF6^{3-},\ NiCl4^{2-},\ CuCl2}$$ how do i find the species which i colorless If possible please provide the concept used to deduce the result it will be very ...
7
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3answers
4k views

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 ...
2
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1answer
380 views

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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1answer
369 views

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 ...
6
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1answer
648 views

Is pyrite (FeS₂) an ionic or a covalent compound?

I have searched all over the web and found a lot of diverse explanations, but none of them are concluding exactly whether $\ce{FeS2}$ (solid - pyrite) is a covalent or an ionic compound. From ...
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2answers
481 views

Reaction between Zinc and Sulfur

Would the reaction between zinc and sulfur be $$\ce{Zn_{(s)} + S_{(s)} -> ZnS_{(s)}}$$ or $$\ce{8 Zn_{(s)} + S_8\ _{(s)} -> 8ZnS_{(s)}}$$ I know that $\ce{S}$ and $\ce{S8}$ are allotropes of ...
2
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2answers
71 views

Chemical Bonding

A Covalent bond involves overlapping of orbitals while an Ionic bond involves charge separation. Why is overlapping of orbitals less stronger than charge separation,i.e., why is an Ionic bond stronger ...