MOLECULAR POLARITYFIELD NOTE 118 / 175

Is HCl polar or nonpolar?

HCl is polar because chlorine pulls bonding electrons more strongly than hydrogen across their single bond.

THE ANSWERPolar.

Hydrogen Chloride · linear

FIGURE 01

The molecule in space

Drag to turn the molecule. A two-atom molecule has no bond angle.

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

THE REASONING

Why HCl is polar

In hydrogen chloride, chlorine (3.16) is more electronegative than hydrogen (2.20), pulling the shared electrons toward itself.

A USEFUL DISTINCTION

What to notice

The H–Cl bond itself is the whole molecular geometry. A 'central atom' or molecular bond angle is not applicable to HCl.

QUICK REFERENCE

Common questions about HCl

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

    H and Cl share one bond. Cl has three lone pairs and H has none.

  2. 02
    What is the molecular geometry of HCl?

    HCl is a two-atom molecule, so its geometry is linear. A bond angle needs three atoms and is not defined here.

  3. 03
    What is the molar mass of HCl?

    HCl has an approximate molar mass of 36.46 g/mol, calculated from its formula using abridged standard atomic weights. Natural isotope variation can change the last digits.

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