The nature of water
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The Nature Of Water. By Mary Dann . Physical Properties of Water. Water is necessary for life and is the most abundant component of living things Most marine organisms are between 70% and 80% water by mass Excellent solvent High boiling and freezing point.

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The Nature Of Water

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The nature of water

The Nature Of Water

By Mary Dann


Physical properties of water

Physical Properties of Water

  • Water is necessary for life and is the most abundant component of living things

  • Most marine organisms are between 70% and 80% water by mass

  • Excellent solvent

  • High boiling and freezing point


The nature of water

  • Water molecules are composed of two atoms of hydrogen and one atom of oxygen

  • Oxygen carries a slight negative electrical

  • Hydrogen atom carries a slight positive electrical charge

  • Water molecule is polar: positive and negative end


The nature of water

  • Because water molecules are polar, they have a tendency to form hydrogen bonds

  • The high boiling point of water (100⁰C) reflects the amount of energy needed to overcome the attractive forces of the hydrogen bonds

  • When water freezes the molecules move away from each other

  • Solid water (ice) is less dense then liquid water

  • This allows oceans not to freeze completely and for marine life to continue


The nature of water

  • The polar nature of water molecules also accounts for water’s solvent properties

  • Salt is a polar substance that dissolves easily in water

  • Ions are individually charged particles

  • Water is not able to dissolve molecules that are nonpolar like oils and petroleum products


The nature of water

  • Hydrogen bonds cause water molecules to be very cohesive

  • Water has a high surface tension

  • Contributes to the high boiling point of water

  • Many small organisms like water strides have adapted to using surface tension so that they can live on the surface of the water


The nature of water

  • Water is attracted to the surface of objects that carry electrical charges.. This is called adhesion

  • Water can rise in narrow spaces which is called capillary action


The nature of water

  • The amount of heat energy required to change the temperature of 1 gram of a substance 1 degree C is called specific heat or thermal capacity

  • Large bodies of water maintain a constant temperature because of the large amount of heat it takes to change the temperature.


Chemical properties of water

Chemical Properties of Water

  • Compounds are classified as acids or bases based on how they iodize when put into water

  • Acids form hydrogen ions

  • Bases form hydroxide ions

  • pH scale is an indicator of the number of hydrogen ions in a volume of a solution

  • Ranges from 0-14


The nature of water

  • Water 

  • The End


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