Page 25 - E-Science Prep.2 2024-2025 t1 Unit1_Neat

Hydrogen bond:-It’s an electrostatic attraction between molecules of
polar compounds

-Hydrogen bond is weaker than covalent bond.

Hydrogen bond is responsible for the abnormal behavior of water

Physical properties

1- Water Solid ice

exists in Liquid water

threestates. Gas water vapor

2- Water is a Bec. it has a great ability to dissolve:
good polar - Most of ionic compounds (as table salt)
Solvent: - Some covalent compounds (as sugar) by

forming hydrogen bonds.
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2nd Prep. First Term 3
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