How can i easily identify which is polar and which is non-polar compound?
2006-08-26 07:32:36 · 4 answers · asked by star123 2 in Science & Mathematics ➔ Chemistry
If you have the Lewis Structure of the compound you can look at the polarity of each individual bond. If these cancel out, the molecule isn't polar. Using the Lewis Structure is also an easy way to see if the compound is symmetrical - this is another sign of a nonpolar compound.
2006-08-26 10:37:01 · answer #1 · answered by Anonymous · 0⤊ 0⤋
It depends on the electron affinity, ionisation energy and such properties of the constituent elements of a compound. Say, for example HCl - Hydrogen chloride or generally known as hydrochloric acid. In HCl, Cl has a greater affinity for the shared pair of electron then H. Hence, the compond becomes polar cause the Cl ion tends to pull the single e- being shared towards itself. Thefore, the Lewis-Dot structure'd be smthng like this - H--->Cl.
2006-08-26 07:45:23 · answer #2 · answered by Leo 2 · 0⤊ 0⤋
These answers are right but you also have to look at the symmetry of the molecule. A molecule which has polar bonds can still be a non-polar molecule if it is symmetric so that the dipoles cancel each other out
2006-08-26 08:11:21 · answer #3 · answered by tiggeronvrb 3 · 0⤊ 0⤋
The electronegativity difference
Anything under 0.4 is nonpolar covalent
Anything between 0.4 and 2.1 is polar covalent
Anything above 2.1 is ionic
2006-08-26 07:46:27 · answer #4 · answered by embem171 4 · 1⤊ 0⤋