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Water, Acids, Bases, and Buffers

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by

Mark Van Arsdale

on 29 August 2016

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Transcript of Water, Acids, Bases, and Buffers

Water has polar covalent bonds, which means water molecules act like magnets.
Water sticks to other surfaces (adhesion.)
Water sticks to itself (cohesion.)
Water has a high specific heat
Water has a high heat of vaporization
Water expands when it freezes.
Water is a powerful solvent
Biological Significance: All of life's chemistry happens in solution (dissolved in water.)
Biological Significance: Aquatic ecosystems thrive below winter ice. Polar organisms thrive on top of the ice.
Biological Significance: It takes a lot of energy to convert liquid H2O into vapor. That helps this guy stay cool.
Biological Significance: Liquid H2O can absorb large amounts of heat with small changes in temperature, moderating local climates and maintaining constant temperatures in bodies with lots of water - like yours.
Biological Significance: surface tension provides some organisms new opportunities and habitats.
Biological Significance: Water is more buoyant and more difficult to move through than air. Trees can pull water up against gravity. What else?
=
Water
H + O = H2O
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