Questions tagged [covalent-compounds]

For questions about covalent compounds - which are compounds in which all intermolecular bonds between atoms are considered mostly covalent - have a stronger covalent than ionic or metallic component. This tag is not to be confused with [bond].

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Why does water ionize on adding dry ammonia to it?

On adding pure dry NH₃ to H₂O, the lone pair in ammonia molecule forms a coordinate covalent bond with the hydrogen ion in water to form ammonium ion. But why will the hydrogen ion separate from water ...
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2answers
185 views

Does lithium form ionic hydride? [duplicate]

It is stated in my chemistry textbook that lithium indeed forms lithium hydrides. However, significant covalent characters could be found in lithium hydrides (like least reactivity). But in some other ...
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How big a role does electron repulsion play in regard to the bond length of a covalent bond? [duplicate]

In a covalent bond, there are several forces acting together to determine the bond length. Electron-electron repulsion increases the bond length. Proton-proton repulsion increases the bond length. ...
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1answer
35 views

Comparing covalent characters of two halides of group 15

Which is more covalent : NCl3 or PCl5 and why? This question was asked on a test, and the given answer was NCl3. Shouldn’t PCl5 be more covalent since pentahalides are more covalent than trihalides?
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Comparing bond length [duplicate]

Compare the length of P-Cl bond in $PCl_3F_2$ and $PCl_2F_3$( Answer is bond length of P-Cl bond greater in $PCl_3F_2$)
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Why does steam store large amounts of energy?

We all know that steam can be used to perform mechanical work and steam has a high capacity for energy storage. But why does steam have such high energy capacity? I tried searching for answers on the ...
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1answer
57 views

Why can covalent compounds dissolve in organic solvents? [closed]

Why can covalent compounds dissolve in organic solvents? I researched about it a little and I found an article which said: "Mostly all organic compounds are non-polar in nature. Also, covalent ...
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3answers
23k views

Why do Magnesium and Lithium form *covalent* organometallic compounds?

Lithium and magnesium are Group 1 and Group 2 elements respectively. Elements of these groups are highly ionic, and I've never heard of them forming significantly covalent inorganic compounds. Yet ...
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1answer
340 views

The order of increasing covalent nature in group 12 (Zn, Cd and Hg)

Suppose $\ce{Zn}$, $\ce{Cd}$ and $\ce{Hg}$ were to form a bond with the same element; say $\ce{ZnCl2}$, $\ce{CdCl2}$ and $\ce{HgCl2}$ Then which of the compounds would be showing most covalent ...
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Bond angles in BrF5

If in an octahedral structure there is one lone pair placed on any two of the axial position then will the lone pair distort all the 90 degree angles due to repulsion from lone pair or the angles will ...
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1answer
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Why is Lithium Chloride (LiCl) soluble in alcohols?

According do J.D. Lee's Concise Inorganic Chemistry, LiCl is soluble in alcohols because it has some covalent nature, althought it is mainly polar. Why would LiCl have covalent character? Why doesn't ...
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1answer
71 views

Are there any coordinate covalent bonds in potassium ferricyanide? [closed]

From my analysis, potassium ferricyanide has 3 ionic bonds between $\ce{K^{+}}$ & $\ce{[Fe(CN)_6]^{-3}}$. Between carbon and nitrogen atoms of 6 $\ce{CN^-}$ ions, there are $3\times 6=18$ covalent ...
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5answers
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Fundamental forces behind covalent bonding

I understand that covalent bonding is an equilibrium state between attractive and repulsive forces, but which one of fundamental forces actually causes atoms to attract each other? Also, am I right ...
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3answers
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Why are pi bonds only formed when sigma bonds are formed?

While studying about bonding there was one statement that "pi bonds can only be formed only with sigma bonds" as we know that in double bond there is 1 sigma bond and 1 pi bond but then one question ...
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5answers
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Percentage ionic character when electronegativity is given

What is the ionic character of a bond, $\ce{A-B}$, in terms of the electronegativities of $\ce{A}$ and $\ce{B}$ ($\chi_\ce{A}$ and $\chi_\ce{B}$)? I have been taught that the percentage ionic ...
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1answer
63 views

How does the position of hydroxyl group in a nucleotide monomer affect the dehydration synthesis of nucleotides?

In dehydration synthesis of nucleotides, the hydrogen atom from the 3' carbon on the deoxyribose sugar of one nucleotide reacts with the hydroxyl group on the phosphate group of another nucleotide to ...
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3answers
111 views

How are compounds within a complicated mixture detected?

I was reading an article about an independent pharmaceutical watchdog group called Valisure which recently released a report stating that they found Benzene, a toxic substance, in many bottles of ...
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2answers
6k views

Which has the largest bond angle between water, oxygen difluoride and dichlorine oxide?

Which one out of $\ce{H2O}, \ce{Cl2O}, \&\ \ce{F2O}$ will have largest bond angle? I think it should be $\ce{H2O}$ because oxygen is most electronegative in this case so electrons will be more ...
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302 views

Determining covalent bond strengths without hybridisation

Assuming pure $\ce{2s}$ and $\ce{2p}$ orbitals of carbon are used in forming $\ce{CH4}$ molecule, which of the following statements is false? (single choice question) Three $\ce{C-H}$ bonds ...
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1answer
341 views

In which of the following chemical compounds are the building blocks molecules?

In which of the following chemical compounds are the building blocks molecules? (A) $\ce{AgNO3}$ (B) $\ce{HNO3}$ (C) $\ce{KNO3}$ (D) $\ce{NaNO3}$ (B) is the correct answer, but I have no idea why. ...
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3answers
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Effect of noble gas configuration on polarising power

I don't understand this statement written in my textbook about the polarising power of cations: If two cations have the same size and charge, then the one with pseudo noble gas configuration ( with ...
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1answer
170 views

How to determine what covalent compound a substance is?

I have been given a substance which is unknown in my class. The substance is white in colour and is in a powder form. I have conducted a few tests and have found out that the substance is a covalent ...
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3answers
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Covalent and Ionic Bonds

Is sodium nitrate a covalent or ionic compound? This is a test question. I put the answer ionic compound but my teacher says that statement is false because it is only partially ionic as there is ...
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2answers
10k views

How can sulfate be nonpolar covalent if it is a polyatomic ion? [closed]

$\ce{SO4^2-}$ is a polyatomic ion as well as a nonpolar covalent compound. How can it be ionic and covalent at the same time? Same applies to sulfite $\ce{SO3^2-}$. It's a polyatomic ion as well as a ...
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1answer
62 views

Lone pairs of electrons and covalent bonding [closed]

Every time I saw a covalent bond structure, I notice that there are always lone pairs or no electrons left in the outer shell of the atoms. Is it compulsory for covalent bonds to have lone pairs or no ...
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How do bond electrons covers both atoms in covalent bond? [duplicate]

I want to know how bonding electrons behave when they have to cover for both atoms. Electrons can spin around only one atom right? If so, then what happens when a covalent bond forms? Let's say we ...
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1answer
939 views

Why does covalent nature in ionic solids increase the lattice energy?

I have observed in my textbooks that ionic solid that have a greater covalent character tend to have higher lattice energy. Can this be generalised as fact?
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1answer
71 views

Why is it that nitrogen hybridizes in ammonia, yet in F2, fluorine does not [closed]

It seems rather arbitrary to me that we have decided that nitrogen sp3 hybridizes in ammonia to stay consistent with VSEPR, yet that fluorine uses its 2p orbital to bond with another fluorine in F2 (I....
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2answers
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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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1answer
556 views

Are Tellurium Fluoride or Antimony Fluoride Ionic?

I would like to know if any of the tellurium fluorides or antimony fluorides are ionic. I am aware that the difference in electronegativity is greater than the 1.665 cutoff indicating ionic bonds. ...
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2answers
80 views

Is this analogy right? [closed]

Is my logic correct in this case ? Since the formal charge represents the charge the element possess in a covalent compounds, is it right to say that formal charge is the equivalent term for covalent ...
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Is Polyethylene Glycol always derived from Ethylene Glycol? If not, how does it differ?

I have heard Polyethylene Glycol is derived from Ethylene Glycol, so was doing some research to see how they differ and found this. Now this states that: Polyethylene glycol is produced from the ...
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1answer
3k views

Why is silicon oxide giant covalent structure?

Why is silicon oxide giant covalent structure? Why it doesn't bond like carbon dioxide?
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65 views

Dielectric constant for gases possessing van der Waals forces [closed]

I've learnt that water can dissolve ionic bonds because it possesses a high dielectric constant. In the cases of covalent compounds (especially the non-polar covalent compounds), where the molecules ...
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1answer
375 views

How can I know which molecule is more stable when bond order it's equal?

So, I was wondering, I have these molecules $\ce{O^+2}$, $\ce{O^-2}$, $\ce{O2}$ and $\ce{C^+2}$. When I try to find their bond order and their magnetic nature I get this: $\ce{O^+2} = \frac{1}{2} \...
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484 views

Covalency in bonding across the periodic table

Bonding between main group elements is obviously almost entirely covalent and it is often easy to see these covalent bonds as 2c-2e bonds localised between two atoms. The bonding in borane, boron ...
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1answer
495 views

Does boron form compounds without covalent bonds?

I have read that boron, due to the very high sum of its first three ionization energies, it is not able to form its +3 ions, and thus it generally forms only covalent compounds. But in a popular ...
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What kind of bond exists between a metal and a non-metal with a difference in electronegativity of less than 1.7? [duplicate]

I'm being taught that the kind of bonds that exist between elements depends on the electronegativity difference between the elements. A difference less than 1.7 is covalent and a difference higher ...
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2answers
3k views

Oxygen and sulfur bonding

Why does oxygen form a double bond in $\ce{O2}$ but sulfur, also from group 16, forms single bonds in $\ce{S8}$?
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1answer
149 views

How is dipole moment of ammonia less than sulphur dioxide? [closed]

Sulphur dioxide has only two bonds at 180º so shouldn't the dipole moment of molecule be 0 and as ammonia has 1 lone pair so it's dipole can't be 0 so how Sulphur dioxide has more dipole moment than ...
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1answer
235 views

If Electronegativity of Cl is greater than H2 then why is the bond angle of Cl2O greater than H2O? [duplicate]

If Electronegativity of Cl is greater than H2 then why is the bond angle of Cl2O greater than H2O? Cl2 has more EN than H2 and size of Cl2 is more than H2 but if we go according to EN then more angle ...
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1answer
40 views

Despite being less reactive,alkanes are highly flammable [closed]

I read in my book that alkanes are saturated compunds and the valencies of carbon are satisfied by single bonds. I knew that propane and butane are highly flammable and could cause explosion. My ...
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1answer
3k views

Why don't covalent compounds have ions? [closed]

When a covalent bond is formed, elements gain shared electrons. Wouldn't this mean covalent compounds contain ions? According to BBC and other sources they don't have any ions at all... How is this so?...
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1answer
367 views

How many covalent bonds are there in carbon suboxide?

Calculate the number of covalent bonds in $\ce{C3O2}$. Structure: I am confused. I can count covalent bonds as 8 by counting single-single bonds, but also I can say that there are 4 "double ...
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2answers
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What is the bond in H2O (water) molecule ? And why? [duplicate]

Is it covalent or coordinate covalent bond? Because it can be a bond between $\ce{O}$ and two $\ce{H}$ atoms and so it will be covalent bond. And it can be a bond between $\ce{H+}$ ion and $\ce{OH-}$ ...
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2answers
29k views

How many hydrogen bonds in these compounds?

We usually get some questions about how many hydrogen bonds these compounds can create, we use it to differentiate between the boiling point of each one of them so it would be great if you could help ...
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1answer
55 views

bonding in polar covalent bonds

I have recently learned that pure ionic and covalent bonds are just the extremes of a spectrum of bonds from this article from Chemguide. But I can't seem to square this with my understanding of how ...
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1answer
4k views

Why are there more fluoride compounds formed with Xenon?

Based on WebElements, of the Noble Gases, $\ce{He}$ and $\ce{Ne}$ do not react with any of the halogens; however: $\ce{HArF}$ has been detected at low temperatures (thank you to @bon and @Martin in ...
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1answer
2k views

Comparison of C-Cl bond length in CH3Cl and CF3Cl

How can one compare the $\ce{C-Cl}$ bond lengths in chloromethane ($\ce{CH3Cl}$) and chlorotrifluoromethane ($\ce{CF3Cl}$)? Bent's rule is also consistent with Gillespie's VSEPR model, and may ...
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2answers
3k views

Lewis Structure of OF+

Would the Lewis Structure for OF+ be drawn so that the more electronegative atom has the more negative formal charge, or would it be drawn to satisfy the octet rule? Here are my thoughts thus far: ...

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