The bonding between the hydrogen atom and the polar nature of the water account for adhesion and cohesion characteristics of water.
Further Explanation:
The water molecules have two hydrogen atoms attached to an oxygen atom by a polar covalent bond. Carbon has an electronegativity of 2.55, which is very close to the electronegativity of hydrogen (2.20). Water is a good solvent because it is a polar molecule (polarity of a molecule is the separation of electric charge result to a molecule consisting of an “electric dipole moment” through a positively charged end and negatively charged end). The oxygen atom in the water molecule is more electronegative (tendency to attract electrons, as they are electron deficient.), while hydrogen molecule is electropositive as compared to the oxygen.
Due to this electronegativity difference, the shared pair of electrons is prominently pulled towards the oxygen atom, giving the atom a partially negative charge, and the hydrogen atoms a partially positive charge. The polarity of water is accountable for the “cohesion and adhesion” characteristics of water.
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Answer Details:
Grade: High School
Subject: Biology
Chapter: Water
Keywords:
Water, electronegative, oxygen, atom, negative charge, carbon, electron, tendency, hydrogen, positive charge, polar covalent bond.