please answer this?

Question

how can one differentiate and tell whether a compound is polar covalent or it is non polar covalent i need a detailed explanation please thanks

Answer 1

covalent bonds are usually formed when sharing of electrons takes place.
when the electronegetivity(It is a measure of the ability of an atom or molecule to attract electrons in a chemical bond) differences between atoms are negligible,non-polar bonds are formed..when the difference in the electronegetivity is large between those two atoms in a compound,then,polar covalent bond is formed..if,in a covalent bond if one atom pulls slightly harder than the other a polar covalent bond will form.

Two scales of electronegativity are in common use: the Pauling scale and the Mulliken scale Another proposal is the Allred-Rochow scale

we can predict polarity lik this in some cases.
Formula Description Example
Polar AB Linear Molecules CO
HAx Molecules with a single H HCl
AxOH Molecules with an OH at one end C2H5OH
OxAy Molecules with an O at one end H2O
NxAy Molecules with an N at one end NH3

Nonpolar
Ax All elements O2
CxAy Most carbon compounds CO2

.

hope this helps u

Answer 2

Well, covalent means that you're not dealing with ions. So no salts.

Imagine the molecule as something that is central atom with other atoms pulling on its sides. If there is equal strength pulling from all sides, you have a nonpolar covalent bond. An example would be methane, CH4. You have the carbon in the middle, then 4 hydrogens "pulling" on it from all sides. Keep in mind that this shape is not a square planar but a tetrahedron. Since all of them are hydrogens, it is pulling with the same amount of strength.

If you have a molecule like CH3F, you have a central carbon atom, and the 3 hydrogens and 1 fluorine atom on the sides. Since Fluorine is a much more electronegative atom than hydrogen, it has a stronger pull than the hydrogens. The carbon is being pulled one way. It is not balanced out. This is a polar covalent molecule.

Answer 3

You should be able to get access to a table of electronegativities. Look up the two elements the bond is between and if the difference is mors than 0.5 the molecule is polar covalent. If not it is considered non-polar.

Hope this helps!

Answer 4

Chemical polarity, also known as bond polarity or just polarity, is a concept in chemistry which describes how equally bonding electrons are shared between atoms. It is a physical property of compounds and affects other physical properties such as solubility, melting points and boiling points. Polarity also affects intermolecular forces, leading to some compounds or molecules within compounds being labelled as polar or non-polar.

Polarity refers to the dipole-dipole intermolecular forces between the slightly positively-charged end of one molecule to the negative end of another or the same molecule. Molecular polarity is dependent on the difference in electronegativity between atoms in a compound and the asymmetry of the compound's structure. For example, water is thought to be polar because of the uneven sharing of its electrons. However, methane is considered non-polar because the carbon shares the hydrogen molecules uniformally.


hope this make sense to you

Answer 5

If the molecules are different,its probably polar convalent.