MOLECULAR POLARITYFIELD NOTE 113 / 175

Is H2S polar or nonpolar?

H2S is polar because its two S–H bonds form a bent structure rather than opposing each other.

THE ANSWERPolar.

Hydrogen Sulfide · bent

FIGURE 01

The molecule in space

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STRUCTURE / 01
S ×1H ×2
SHH
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01 / MODEL RECORDPubChem 3D coordinates. Atom sizes and bond thickness are illustrative.How model data is used ↗

THE REASONING

Why H2S is polar

Hydrogen sulfide has a bent geometry with a 92° bond angle, similar to water. Sulfur (2.58) is more electronegative than hydrogen (2.20), creating polar S–H bonds.

A USEFUL DISTINCTION

What to notice

H2S is bent like water, though its bond angle and bond polarity differ. The two S–H bond contributions do not cancel.

QUICK REFERENCE

Common questions about H2S

  1. 01
    What does the Lewis structure of H2S show?

    The Lewis structure is H–S–H. Sulfur makes two single bonds and keeps two lone pairs.

  2. 02
    What is the molecular geometry of H2S?

    H2S has a bent molecular geometry. The 3D model shows representative bond angles of 93.4°. These angles come from the displayed model coordinates.

  3. 03
    What is the molar mass of H2S?

    H2S has an approximate molar mass of 34.08 g/mol, calculated from its formula using abridged standard atomic weights. Natural isotope variation can change the last digits.

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