Is OH2 polar or nonpolar? – (Polarity of OH2)
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The question is –
Is OH2 polar or nonpolar?
Answer:
⇒ OH2 is polar (net µ = 1.85 Debye).
Explanation:
Water (OH2), more conventionally written as H2O, is polar as the dipole moments of individually polar O-H bonds do not get canceled equally in the bent, angular, or V-shaped molecule.
OH2 consists of two O-H single covalent bonds.
Each O-H bond is polar as it consists of an electronegativity difference of 1.24 units between an oxygen (E.N = 3.44) and a hydrogen (E.N = 2.20) atom.
Oxygen, being more electronegative, attracts the O-H bonded electrons towards itself to a larger extent; thus, it gains a partial negative charge (δ–).
Contrarily, both terminal H-atoms gain partial positive charges (δ+).
The central O-atom carries 2 lone pairs of electrons in OH2, which leads to strong lone pair-lone pair and lone pair-bond pair electronic repulsions.
OH2 thus occupies a bent, angular, or V-shape as opposed to its ideal tetrahedral electron pair geometry.
The O-H dipole moments do not get canceled in the bent molecular shape.
Consequently, OH2 or H2O is overall polar (net µ > 0).
Also, check –
⇒ How to identify polar or nonpolar compounds?
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