The properties of water
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The Properties of Water. The Mickey Mouse Molecule!. Hydrogen. Hydrogen. Oxygen. Structure of a Water Molecule. Water is polar. A polar molecule is a molecule that has an electrical charge. Water is made of: 2 Hydrogen Atoms and 1 Oxygen atom.

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The mickey mouse molecule
The Mickey Mouse Molecule!




Structure of a water molecule
Structure of a Water Molecule

  • Water is polar.

  • A polar molecule is a molecule that has an electrical charge.

  • Water is made of:

    • 2 Hydrogen Atoms and 1 Oxygen atom.

    • The chemical formula for water is:H2O

    • Hydrogen has a positive (+) charge and Oxygen has a negative (-) charge.

4 key properties of water
4 Key Properties of Water

  • Capillary Action

  • Surface Tension

  • Universal Solvent

  • Specific Heat

Capillary action
Capillary Action

  • Capillary action is the combined force of attraction among water molecules and with the molecules of surrounding materials.

  • Examples of Capillary Action of Water:

    • Liquid rising inside a straw

    • Paper towel absorbing water

    • Wet jeans

    • Plant roots absorbing water

    • Sponge

Surface tension
Surface Tension

  • Surface tension is the tightness across the surface of water that is caused by the polar molecules pulling on one another

  • Examples of the surface tension of water:

    • Raindrops forming beads on surface

    • Water strider

    • Paperclip Floating on Water

    • Drops of Water on a Penny

    • Skipping Rocks

    • Meniscus

    • Belly Flops

Jesus lizard
Jesus Lizard

My real name is the “Green Basilisk Lizard “....

But not like the one from Harry Potter!!! 

Universal solvent
Universal Solvent

  • Solution: A mixture that forms when one substance dissolves another.

  • Solvent: substance that does the dissolving.

  • Solute: substance that gets dissolved.

    • Water is the universal solvent because it dissolves so many substances because of its high polarity.

    • Water can dissolve substances such as salt and sugar but cannot dissolve oil.

      - Polar Dissolves Polar.

Specific heat
Specific Heat

  • Water requires a lot of heat (gain or loss) to change its temperature due to the strong attraction among water molecules.

  • Specific heat is the amount of heat needed to increase the temperature of a substance by 10C

  • Example of specific heat:

    - Water temperature vs. sand temperature at the beach during the day.

Why does water have a high specific heat
Why does water have a high specific heat?

  • Water’s high specific heat is due to thestrong attraction among water molecules.

  • The molecules arestuck togetherand it takesa lot of energyto break the strong bonds of the water molecules.

Changing state
Changing State

  • Water exists in 3 forms:

    • solid

    • liquid

    • gas




Molecule movement
Molecule Movement

Molecules move the slowest in a solid.

  • Solid-molecules are close together

    Molecules move the fastest in a gas.

  • Gas-molecules move freely; they are spread apart

Phase changes
Phase Changes

  • Melting-water changes from a solid to a liquid

    • Example: Ice melts into water

  • Freezing-water changes from a liquid to a solid

    • Example: Water freezes into ice





Phase changes1
Phase Changes

  • Evaporation- process by which molecules at the surface of a liquid absorb enough energy to change to the gaseous state

    • Example: boiling water, hair air-drying, wet clothes drying on a clothesline outside, puddle drying up

  • Condensation-process by which a gas changes to a liquid

    • Example: water droplets on the outside of a glass

      fogging up a window