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Properties of Water

Discover the essential characteristics of water, from its polarity and cohesion to adhesion and capillarity, enabling various phenomena in nature and essential processes in plants. Learn how water molecules interact with each other and other substances, influencing everyday occurrences like raindrops, surface tension, and capillary action. Witness the wonders of water's behavior and its crucial role in sustaining life on Earth.

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Properties of Water

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  1. Properties of Water

  2. 1. Polarity - Polar molecules have a positive (+) and a negative (-) side. In water, the Hydrogen is positive and the Oxygen is negative.

  3. 2. Cohesion - The positive hydrogens are attracted to the negative oxygen of a neighboring water molecule. The molecules are held together by these Hydrogen bonds.

  4. Examples of Cohesion: • The shape of raindrops • Water beading up on a newly polished car • The convex surface of water when a container is filled to nearly overflowing • Surface tension – an organism can walk on water if it doesn’t break the hydrogen bonds holding the water molecules together. (water strider, basilisk)

  5. 3. Adhesion - Because water molecules are polar they stick to other substances. Ex:water sticks to the side of the graduated cylinder forming a meniscus

  6. The volume is read from the bottom of the meniscus.

  7. 4. Capillarity - Water moves up narrow tubes by a combination of adhesion and cohesion. This is how water gets from the roots to the leaves.

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