0914 - The Chemistry of Water Water is the most abundant...

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The Chemistry of Water Water is the most abundant molecule in living organisms Water has chemical and physical properties extremely important for sustenance of life on earth Two important things about the structure of water: A. Individual water molecules are polar B. Multiple water molecules form hydrogen bonds
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A. Individual water molecules (H 2 O) are polar : The whole molecule is neither positive or negative One end is slightly negative Other end slightly positive This polarity results in characteristics that are important for living things: 1. Water is a good solvent 2. Water easily ionizes – important for pH
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1. Polarity of water molecules makes a good solvent Water molecules surround other molecules & forms bonds with them – dissolves them Polar and charged molecules dissolve easily (Na + , Cl - ) Non-polar substances do NOT dissolve easily (oil) Polarity of water also means that it can be contained in membranes (which are non-polar) Salt dissolving in water
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2. Water Molecules Easily Ionize
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This note was uploaded on 11/07/2009 for the course BIO 101 taught by Professor Wetherbee during the Fall '08 term at Rhode Island.

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0914 - The Chemistry of Water Water is the most abundant...

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