MOLECULAR POLARITYFIELD NOTE 112 / 175

Is H2O2 polar or nonpolar?

H2O2 is polar because its O–H bond dipoles occur in a non-planar arrangement and do not cancel.

THE ANSWERPolar.

Hydrogen Peroxide · non-planar

FIGURE 01

The molecule in space

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STRUCTURE / 01
O ×2H ×2
HOOH
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01 / MODEL RECORDPubChem 3D coordinates. Atom sizes and bond thickness are illustrative.How model data is used ↗

THE REASONING

Why H2O2 is polar

Hydrogen peroxide consists of two OH groups joined by an O–O bond in a non-planar, skewed arrangement. Oxygen (3.44) is much more electronegative than hydrogen (2.20), creating polar O–H bonds.

A USEFUL DISTINCTION

What to notice

Hydrogen peroxide has two oxygen centers and a non-planar arrangement. Treating the whole molecule as a simple three-atom bent shape misses its O–O bond and torsion.

QUICK REFERENCE

Common questions about H2O2

  1. 01
    What does the Lewis structure of H2O2 show?

    The connectivity is H–O–O–H. Each O makes two single bonds and has two lone pairs.

  2. 02
    What is the molecular geometry of H2O2?

    H2O2 has a non-planar molecular geometry. The 3D model shows representative bond angles of 95.8°. These angles come from the displayed model coordinates.

  3. 03
    What is the molar mass of H2O2?

    H2O2 has an approximate molar mass of 34.01 g/mol, calculated from its formula using abridged standard atomic weights. Natural isotope variation can change the last digits.

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